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http://challengejournal.com/index.php/cjsmec/issue/feed Challenge Journal of Structural Mechanics 2018-05-20T21:00:51+03:00 Journal Management email@example.com Open Journal Systems
 cjsmec.challengejournal.com

Challenge Journal of Structural Mechanics is an international, quarterly published and open access scholarly journal that publishes original research articles as well as review articles, case studies, short communications, discussions, book reviews, letters to the editor and a diary on international events related to any aspect of structural engineering.

Primary aim of CJSMEC is to encourage academic challenges in structural mechanics and materials disciplines to seek for the global truth. Therefore, the Journal intends to publish at least a review or discussion as a challenge to previously published papers at each issue. A double blind peer-review policy is followed in order to increase the scientific quality of the published papers.
 http://challengejournal.com/index.php/cjsmec/article/view/288 Effects of structural irregularities on low and mid-rise RC building response 2018-05-20T21:00:51+03:00 Hüseyin Bilgin firstname.lastname@example.com Rezarta Uruçi email@example.com
During the recent earthquakes, it has been observed that structural irregularities are one of the main reasons of the building damage. Irregularities are weak points in a building which may cause failure of one element or total collapse of the building during an earthquake. Since Albania is a country with moderate seismicity which has been hit by earthquakes of different magnitudes many times establishes the need to study the effect of irregularities is well-founded. The main structural irregularities encountered in Albanian construction practice consist of short column, large and heavy overhangs and soft story. In this study, these types of irregularities are considered in two different types of buildings, low and mid-rise reinforced concrete frame buildings represented by 3- and 6- story respectively. Pushover analyses are deployed to get the effect of structural irregularities on RC buildings response. A building set is chosen to represent the existing construction practice in the region; regular framed building and buildings with irregularities such as soft stories, short columns, heavy overhangs and the presence of soft story with heavy overhangs. The analyses have been conducted by using ETABS and Seismosoft software. Pushover curves of building set are determined by nonlinear static analysis in two orthogonal directions. Comparative performance evaluations are done by considering EC8 and Albanian Seismic codes (KTP-N2-89). From the obtained results, it is observed that low and mid-rise structures with soft story- two sided overhangs and short column are more vulnerable during earthquakes.
 2018-04-19T11:45:23+03:00 Copyright (c) 2018 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/308 Investigating the effect of infill walls on steel frame structures 2018-03-03T17:53:31+03:00 Osman Fatih Bayrak firstname.lastname@example.com Seda Yedek firstname.lastname@example.com Muhammet Musab Erdem email@example.com Murat Bikce email@example.com

Infill walls consisting of materials such as hollow concrete, hollow clay and autoclaved aerated concrete bricks are not only preferred in reinforced concrete buildings but also in steel frame structures. It is a well-known fact that infill walls limit the displacement of frames under horizontal loads. However, they may also bring about certain problems due to being placed randomly in horizontal and discontinuously in vertical directions for some architectural reasons. Moreover, cracks in frame-wall joints are observed in steel frame structures in which ductile behaving steel and brittle behaving infill walls are used together. In this study, the effect of infill walls on steel frames has been investigated. In the steel frame structure chosen for the study, four different situations consisting of different combinations of infill walls have been modeled by using ETABS Software. Later, the pushover analyses have been performed for all the models and their results have been compared. As a result of the analyses done by using the equivalent diagonal strut model, it has been found out that infill walls limit the displacement of steel frames and increase the performance of a structure. However, it has been also determined that in the steel frame structure in which the infill walls have been placed discontinuously in vertical and asymmetrically in horizontal, infill walls may lead to torsional and soft story irregularities. As a result, it is possible to observe cracks in the joints of infill walls and steel frame, the deformation properties of which differ, unless necessary precautions are taken.

 2018-03-03T17:41:16+03:00 Copyright (c) 2018 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/295 Seismic assessment of a curved multi-span simply supported truss steel railway bridge 2018-03-03T17:53:30+03:00 Mehmet Fatih Yılmaz firstname.lastname@example.com Barlas Özden Çağlayan firstname.lastname@example.com Kadir Özakgül firstname.lastname@example.com

Fragility curve is an effective method to determine the seismic performance of a structural and nonstructural member. Fragility curves are derived for Highway Bridges for many studies. In Turkish railway lines, there are lots of historic bridges, and it is obvious that in order to sustain the safety of the railway lines, earthquake performance of these bridges needs to be determined. In this study, a multi-span steel truss railway bridge with a span length of 25.7m is considered. Main steel truss girders are supported on the abutments and 6 masonry piers. Also, the bridge has a 300m curve radius. Sap 2000 finite element software is used to model the 3D nonlinear modeling of the bridge. Finite element model is updating according to field test recordings. 60 real earthquake data selected from three different soil conditions are considered to determine the seismic performance of the bridge. Nonlinear time history analysis is conducted, and maximum displacements are recorded. Probabilistic seismic demand model (PSDMs) is used to determine the relationship between the Engineering Demand Parameter (EDP) and Intensity Measure (IMs). Fragility curve of the bridge is derived by considering the serviceability limit state, and results are discussed in detail.

 2018-03-03T17:41:15+03:00 Copyright (c) 2018 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/313 Forced vibration analysis of Mindlin plates resting on Winkler foundation 2018-03-03T17:53:30+03:00 Yaprak Itır Özdemir firstname.lastname@example.com

The purpose of this paper is to study shear locking-free parametric earthquake analysis of thick and thin plates resting on Winkler foundation using Mindlin's theory, to determine the effects of the thickness/span ratio, the aspect ratio and the boundary conditions on the linear responses of thick and thin plates subjected to earthquake excitations. In the analysis, finite element method is used for spatial integration and the Newmark-β method is used for the time integration. Finite element formulation of the equations of the thick plate theory is derived by using higher order displacement shape functions. A computer program using finite element method is coded in C++ to analyze the plates clamped or simply supported along all four edges. In the analysis, 8-noded finite element is used. Graphs are presented that should help engineers in the design of thick plates subjected to earthquake excitations. It is concluded that 8-noded finite element can be effectively used in the earthquake analysis of thick plates. It is also concluded that, in general, the changes in the thickness/span ratio are more effective on the maximum responses considered in this study than the changes in the aspect ratio.

 2018-03-03T17:41:15+03:00 Copyright (c) 2018 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/290 Mechanical performance comparison of glass and mono fibers added gypsum composites 2018-03-03T17:53:30+03:00 Sadık Alper Yıldızel email@example.com Serdar Çarbaş firstname.lastname@example.com

Gypsum and gypsum based composite are widely preferred in construction industry for various purposes. Mechanical performances of gypsum composite have been enhanced by researchers in order to increase its area of usage. In this research, gypsum composites containing expanded glass were reinforced by glass fibers (GF) and mono polypropylene fibers (MPF). GF and MPF were used up to 1.5 %. The flexural strength, compressive strength, and shrinkage behavior of the composites were examined within the scope of this study. 50 x 50 x 50 mm and 40 x 40 x 160 sized specimens were prepared for the mechanical performance tests. It was obtained that flexural and shrinkage behavior of the composite were enhanced with the addition of MPF compared to GF added mixes; however, compressive strength values were not as high as GF reinforced composites.

 2018-03-03T17:41:14+03:00 Copyright (c) 2018 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/332 Cover & Contents Vol.4 No.1 2018-03-03T17:41:13+03:00 Journal Management CJSMEC firstname.lastname@example.com 2018-03-03T17:41:13+03:00 Copyright (c) 2018 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/251 Influencing factors on effective width of compressed zone in joint column - cylindrical shell of steel silo 2018-03-03T17:53:30+03:00 Lyubomir Zdravkov email@example.com

In order to ensure unloading of whole amount of stored product by gravity, steel silos are often placed on supporting structure. The simplest way to design these complicated facilities is to divide cylindrical shell on two parts in our minds - discretely supported ring beam and continuously supported shell above it. Obviously, to ensure continuously support of shell, bending stiffness of ring beam should be high. In European standard EN 1993-4-1, that concept is recognized but it keeps silence about recommended stiffness of ring beam. Another way to design is to know law of distribution of compressive axial stresses due to discrete column reactions R, by height of shell. Knowing it, we could calculate the effective width leff of distribution of compressive stresses on every level. Where effective width is equal to distance between discrete supports, there critical height of shell ends and above it cylindrical body is continuously supported. Unfortunately the above quoted standard EN 1993-4-1 does not give an information how to calculate leff. The questions here are; should we accept linear distribution of compressive forces by height? In addition, could we use directly the results of Whitmore (1952), where angle of distribution α = 30°? Or, even to accept a far more brave opinion that α = 45°, used by many of the elder designers? Moreover, is value of angle α constant or does it depend on various influencing factors?

 2018-03-03T17:41:13+03:00 Copyright (c) 2018 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/296 Performance based study on the seismic safety of buildings 2018-02-23T18:09:26+03:00 Zinnur Çelik email@example.com Ahmet Budak email@example.com

In the scope of this study, information has been provided on the Static Pushover Analysis which is a nonlinear deformation controlled analysis method and the Capacity Spectrum Method used to determine the performance point. In this study, static pushover analysis was made on a six-storey building with reinforcement concrete frame system by changing the materials, steel rebars and soil characteristics. The building's capacity curves were drawn and decided according to different concrete and reinforcement groups. Furthermore the performance points of different classes of concrete were studied according to three seismic effect levels. In the case of a decrease in the reinforcement strength, a decrease of approximately 30% occurs in the base shear force. If the concrete strength is increased, an increase of 11% occurred in the base shear force. Consequently, in the comparisons made with five different concrete groups and two different reinforcement groups, rather than the increase in the strength of the concrete, an increase in the reinforcement strength was observed to be more effective on the structural capacity. Furthermore, local soil classifications were observed to be the most significant point regarding peak displacement.

 2018-02-23T18:09:04+03:00 Copyright (c) 2018 Challenge Journal of Structural Mechanics http://challengejournal.com/index.php/cjsmec/article/view/214 Structural behaviour of concrete filled hollow steel sections exposed to parametric fire 2018-01-02T06:18:38+03:00 Mohammed Salah Dimia email@example.com Soumia Sekkiou firstname.lastname@example.com Mohamed Baghdadi email@example.com Mohamed Guenfoud email@example.com
This article analyzes steel-concrete composite columns subjected to natural fire scenarios in order to verify that the possibility of structural collapse during or after the cooling phase is real. The main objectives of this study are: first, to highlight the phenomenon of delayed collapse of this type of columns during or after the cooling phase of a fire, and then analyze the influence of some determinant parameters, such as section size, tube thickness, reinforcement (ratio), concrete cover and column length. The results show that critical conditions with respect to delayed failure arise for massive sections, small values of the steel tube thickness and for columns with massive section.
 2017-12-18T08:31:42+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/291 Mechanical and thermal behaviors comparison of basalt and glass fibers reinforced concrete with two different fiber length distributions 2017-12-28T11:24:48+03:00 Sadık Alper Yıldızel email@example.com

This paper deals with the mechanical and thermal behavior of glass and basalt fiber reinforced concrete. Two different composites were studied containing either basalt or glass fibers. Fiber ratios were selected as 1%, 1.25% and 1.5% for glass fiber; 0.3%, 0.4% and 0.5% for basalt fibers. Fiber length was preferred as 12 mm and 24 mm. The addition of basalt fiber had very limited effect on the compressive, flexure and thermal conductivity properties compared to the glass fiber reinforced composite. The results also showed that composites having fibers with the length of 12 mm had better mechanical properties. Heat transfer simulation of the composites were also conducted. It was obtained that both fibers with the length of 12 mm had very close results on the heat transfer studies.

 2017-12-18T08:31:42+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/256 Estimating bearing capacity of shallow foundations by artificial neural networks 2017-12-28T11:24:47+03:00 Mustafa Aytekin firstname.lastname@example.com

In this study, the Artificial Neural Network, ANN is applied to data extracted from a large set of random data created by using Terzaghi and Meyerhof formulae. By using MS Excel, 3750 sets of data for Terzaghi's equation, 4000 for Meyerhof's equation were generated. A simulated ANN was trained on a subset of bearing capacity data, and the performance was tested on the remaining data. The performances of the ANN models were compared to Terzaghi and Meyerhof results. ANN models were as accurate as the other techniques in estimating the ultimate bearing capacity. The models estimated the ultimate bearing capacity with an average error of around 1% of the value obtained from Terzaghi and Meyerhof equations, and the coefficient of determination (r2) was almost equal to 1. Their sensitivity and specificity is dependent on the function and the algorithm used in the training process. Validation subset is crucial in preventing the over-fitting of the ANN models to the training data. ANN models are potentially useful technique for estimating the bearing capacity of the soil. Large training data sets are needed to improve the performance of data-derived algorithms, in particular ANN models.

 2017-12-18T08:31:41+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/261 A hybrid multi-objective algorithm to predict the characteristics of soil profiles from seismic ground motion records 2017-12-28T11:24:47+03:00 Zamila Harichane firstname.lastname@example.com Mourad A. Khellafi firstname.lastname@example.com Amina Sadouki email@example.com

The underlying goal of this study is to present an efficient algorithm to identify soil parameters such as thicknesses, shear wave velocities, damping and others parameters of subsurface layers, and site amplification characteristics (natural frequencies, peak amplitudes) from a given pair of seismic records. It is a hybrid procedure combining the stochastic genetic algorithms (GAs) optimization method, to find a point close to the global optimum in the global search phase, and a gradient based local determinist method (Levenberg-Marquardt: LM), to refine the solution. To improve the performance of the global search phase, a multi-objective optimization algorithm is used to minimize the errors between some characteristics of the theoretical amplification function and the experimental one of vertical array records. The weighted sum method which combines the weighted objectives into a single objective function is used to solve the optimization problem. The efficiency of the present algorithm is proven by several examples. Results show that the scheme works well and the curve fitting was always satisfying. Also, the proposed procedure leads to good approximations, requiring a lower computational effort, yet with good rates of convergence. Moreover, neither the growing number of parameters nor the vastness of the search space reduces the efficiency of the algorithm in predicting the characteristics of soil profiles and site amplification commonly required in seismic risk mitigation.

 2017-12-18T08:31:40+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/307 Cover & Contents Vol.3 No.4 2017-12-18T08:31:39+03:00 Journal Management CJSMEC email@example.com 2017-12-18T08:31:39+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/239 The strain sensitivity of brass fiber reinforced concrete 2017-09-18T10:55:40+03:00 Egemen Teomete email@example.com Erman Demircilioğlu firstname.lastname@example.com Serap Kahraman firstname.lastname@example.com
The structures are challenged by earthquakes and other environmental factors. Structural health monitoring is crucial to protect the lives. The strain gages used in structural health monitoring have low durability and can get point wise measurements which limit their use. In this study, five different concrete mixtures with different brass fiber volume fractions were designed. Along with the control mixture which does not have brass fiber, six mixtures were designed and three cube samples from each mixture were cast and cured. Compression test was conducted with simultaneous measurement of electrical resistance. The brass fiber reinforced concrete has strong linear relationship between the electrical resistance change and strain. Important progress was achieved in development of "Smart Concrete" which can sense its strain and damage.
 2017-09-18T10:37:05+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/216 Total potential energy minimization method in structural analysis considering material nonlinearity 2017-09-18T10:55:39+03:00 Rasim Temür firstname.lastname@example.com Gebrail Bekdaş firstname.lastname@example.com Yusuf Cengiz Toklu firstname.lastname@example.com
Minimum potential energy principle is the basis of the most of the well-known traditional techniques used in the structural analysis. This principle determines the equilibrium conditions of systems with reference to minimization of the sum of the total potential energy of the structure. In traditional applications, this methodology is formulized by using matrix operations. A methodology has been proposed in the last decades for structural analyses based on the idea of using metaheuristic algorithms to obtain minimum potential energy of the structural system instead of following this classical approach. This new method, called "Total Potential Optimization using Metaheuristic Algorithms (TPO/MA)", has been applied in this paper to truss structures considering linear and nonlinear behavior of the structural material. The metaheuristic method used in this process is teaching-learning based optimization (TLBO) algorithm. The proposed technique is applied on numerical examples and results are compared with other techniques in order to test the efficiency of the proposed method. According to results obtained, TPO/MA method with TLBO algorithm is a feasible technique for the investigated problem.
 2017-09-18T10:37:04+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/262 The influence of elevated temperatures on the mechanical properties of polypropylene fiber reinforced concrete 2017-09-18T10:55:39+03:00 Majid Atashafrazeh email@example.com Ahmet Ferhat Bingöl email@example.com Murat Caf firstname.lastname@example.com This paper describes the strength of Polypropylene Fiber Reinforced Concrete (PFRC) exposed to the elevated temperatures. In the study, control specimens without any fibers and the concrete specimens with the ratios of 0.30, 0.60, 0.90 and 1.20 kg/m³ polypropylene fibers both in woolen and bar shape fiber have been produced. The specimens have been kept in the laboratory conditions for 28 days. Shortly after the curing period was completed, every group was heated at 23, 150, 300, 450, 600 and 750°C for two hours then the compressive strengths of them were determined. The maximum compressive strength was obtained by the specimens including 0.30 kg/m³ woolen polypropylene. For this group, the compressive strength increase was 8% according to the control specimens. The compressive strengths of bar polypropylene fiber concrete were higher than the wool fibers under elevated temperatures. On the other hand, more compressive strength values are obtained from the control specimens than fiber groups at 600°C temperature. Melting the polypropylene fiber at 500°C formed some pore spaces in concrete and caused reduction of the compressive strength. 2017-09-18T10:37:03+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/257 Vertical stiffeners and internal pressure - influencing factors on distribution of meridional stresses in steel silos on discrete supports 2017-09-18T10:55:39+03:00 Lyubomir A. Zdravkov firstname.lastname@example.com
Steel silos are interesting, complicated facilities. In order to ensure unloading of whole amount of stored product by gravity, they are often placed on supporting structure. Values of stresses in joints between thin sheets and supporting frame elements are very high, which could cause local loss of stability in thin shells. Many researchers have worked on values and distribution of the meridional stresses in that joints. Their traditional approach is to divide in their minds cylindrical shell on two parts - discretely supported ring beam and continuously supported shell above it. As a result of their efforts critical height of shell Hcr and ideal position of intermediate stiffening ring on shell are determined. The scientific results are based on semi-membrane theory of Vlasov, in which influence of vertical stiffeners and internal pressure is not accounted. On other hand all steel silos are loaded with an internal pressure and majority of them have vertical stiffeners above supports. Is it possible the obtained scientific results to be applied to these silos? In a present article the author will show that stiffeners and pressure should not be ignored in an analysis.
 2017-09-18T10:37:03+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/241 Modal identification of a reduced-scale masonry arch bridge with experimental measurements and finite element method 2017-09-18T10:55:38+03:00 Emre Alpaslan email@example.com Burcu Dinç email@example.com Kemal Hacıefendioğlu firstname.lastname@example.com Gökhan Demir firstname.lastname@example.com Olgun Köksal email@example.com This study aims to investigate modal parameters such as mode shapes, natural frequencies and damping ratios of a reduced scale one-span historical masonry arch bridge constructed in laboratory conditions by performing numerical and experimental analysis. Sarp Dere historical masonry bridge, in Ordu, Ulubey, has 15.5m in length and 4.75m in width was chosen as a prototype model. The reduced-scale bridge model and structural details were carried out in the scale of 1:12.5. Operational Modal Analysis (OMA) technique was used for experimental study. The experimental modal parameters of the bridge model were figured out by using Enhanced Frequency Domain Decomposition (EFDD). ANSYS software was used to create 3D finite element (FE) model and to expose the analytical modal parameters of the reduced-scaled bridge model. Moreover, FE model of the reduced-scale bridge model was calibrated based on the experimental results by using the Response Surface based FE model calibration technique to obtain more accurate results. The analysis results of experimental, initial and calibrated FE model were compared. It is noted that there are significant differences between the modal parameters obtained from experimental and initial FE model. Model calibration techniques are beneficial to get a more reasonable FE model. 2017-09-18T10:37:02+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/274 Cover & Contents Vol.3 No.3 2017-09-18T10:37:02+03:00 Journal Management CJSMEC email@example.com 2017-09-18T10:37:01+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/236 Elastic foundation effects on arch dams 2017-06-13T16:51:11+03:00 Muhammet Karabulut email@example.com Murat Emre Kartal firstname.lastname@example.com Omer Faruk Capar email@example.com Murat Cavusli firstname.lastname@example.com

Earthquake response of an arch dam should be calculated under ground motion effects. This study presents three-dimensional linear earthquake response of an arch dam. Thereby, we considered different ground motion effects and also foundation conditions in the finite element analyses. For this purpose, the Type 3 double curvature arch dam was selected for application. All numerical analyses are carried out by SAP2000 program for empty reservoir cases. In the scope of this study, linear modal time-history analyses are performed using three dimensional finite element model of the arch dam and arch dam-foundation interaction systems. According to numerical analyses, maximum horizontal displacements and maximum normal stresses are presented by dam height in the largest section. These results are evaluated for rigid and various elastic foundation conditions. Furthermore, near-fault and far-field ground motion effects on the selected arch dam are taken into account by different accelerograms obtained from the Loma Prieta earthquake at various distances.

 2017-06-13T16:44:41+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/238 The strain sensitivity of copper powder reinforced concrete 2017-06-13T16:51:11+03:00 Egemen Teomete email@example.com Özkan Ayberk Kolatar firstname.lastname@example.com Erman Demircilioğlu firstname.lastname@example.com Serap Kahraman firstname.lastname@example.com

Earthquakes, material deteriorations and other environmental factors challenge the structural safety. In order to protect the lives, structural health monitoring is crucial. The metal foil strain gages have low durability, low sensitivity and can get point wise measurements which are disadvantages. In this study six different concrete mixtures were designed; one without any copper powder, the rest five having different copper powder volume fractions. Three cube samples from each mixture were cast and cured. Simultaneous measurement of electrical resistance and strain were conducted during the compression tests. A strong linear relationship between strain and electrical resistance change was obtained for copper powder reinforced concrete. The results are contribution to the development of "Smart Concrete" which can sense its strain and damage.

 2017-06-13T16:44:41+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/85 Teaching-learning based optimization for parameter estimation of double tuned mass dampers 2017-06-13T16:44:40+03:00 Sinan Melih Niğdeli firstname.lastname@example.com Gebrail Bekdaş firstname.lastname@example.com

The classical methods for parameter estimation of tuned mass dampers are well known simple formulations, but these formulations are only suitable for multiple degree of freedom structures by considering a single mode. If special range limitation of tuned mass dampers and inherent damping of the main structure are considered, the best way to estimate the parameters is to use a numerical method. The numerical method must have a good convergence and computation time. In that case, metaheuristic methods are effective on the problem. Generally, metaheuristic method is inspired from a process of life and it is formulated for several steps in order to reach an optimal goal. Differently from the single tuned mass dampers, double tuned mass dampers can be also used for the reduction of vibrations. In civil structures, earthquake excitation is a major source of vibrations. In this study, optimum double tuned mass dampers are investigated for seismic structures by using a wide range of earthquake records for global optimum. As an optimization algorithm, teaching learning based optimization is employed. In this algorithm, the teaching and learning phases of a class are modified for optimization problems. The optimization of double tuned mass damper is more challenging than the single ones since the number of design variable is doubled and the design constraint about the stroke of the both masses must be considered. The proposed method is compared with the existing approaches and the methodology is feasible for parameter estimation of double tuned mass dampers.

 2017-06-13T16:44:40+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/181 Flexural behavior of sustainable reactive powder concrete bubbled slab flooring elements 2017-06-13T16:51:11+03:00 Ashraf Abdulhadi Alfeehan firstname.lastname@example.com Hassan Issa Abdulkareem firstname.lastname@example.com Shahad Hameed Mutashar email@example.com

Voided slabs are reinforced concrete slabs in which voids allow to reduce the amount of concrete. The bubbled deck slab is a new and sustainable biaxial floor system to be used as a self-supporting concrete floor. The use of voided slabs leads to decrease the consumption of materials and improve the insulation properties for enhancing the objectives of sustainability. This study presents an investigation into the flexural behavior of sustainable Reactive Powder Concrete RPC bubbled slab flooring elements. Six one-way slabs were cast and tested up to the failure. The adopted variables in this study are: the volumetric ratio of steel fibers, type of slab; bubbled or solid, placing of reinforcement and thickness of slab. The effect of each variable on the ultimate load, deflection and strain has been discussed. The results show that increasing the percent of steel fibers from 1% to 2% in solid and bubbled slabs decreases the deflection by (18.75%) and (50%) respectively. As well as, the deflection increases by (41%) for bubbled slab compared to the solid slab. The slabs reinforced with top and bottom steel meshes show less deflection than slabs reinforced by only bottom steel mesh.

 2017-06-13T16:44:40+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/255 Cover & Contents Vol.3 No.2 2017-06-13T16:44:39+03:00 Journal Management CJSMEC firstname.lastname@example.com 2017-06-13T16:44:39+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/235 Modelling of non-linear seismic ground response using elasto-plastic constitutive framework within a finite element soil column model 2017-06-13T16:51:10+03:00 Azeddine Chehat email@example.com Zamila Harichane email@example.com Amina Sadouki email@example.com

The prediction of seismic ground response is conditioned by the knowledge of each material behavior of soil deposits. The recourse to plasticity criterion to simulate cyclic behavior of soils under seismic loading is becoming more realistic. In this study, an elasto-plastic constitutive equation is cast within the framework of one dimensional finite element (FE) soil column model to account for the spatial and material nonlinearity of the secant shear modulus. To account of the spatial non linearity, shear modulus is written in terms of rigid base shear modulus and height of the soil column, while for material nonlinearity, the shear modulus degradation is deducted by the application of the isotropic evolution of the Von Misès criterion. Obtained results proved the efficiency of the proposed methodology and the predictive capability of the elaborated elastoplastic model which captures both small- and large-strain behaviors. They likewise highlight the important roles that play the spatial and material shear modulus variation in the prediction of the seismic soil responses.

 2017-06-13T16:44:39+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/237 Modal response identification of a highway bridge under traffic loads using frequency domain decomposition (FDD) 2017-06-13T16:51:10+03:00 Mehmet Akköse firstname.lastname@example.com Hugo C. Gomez firstname.lastname@example.com Maria Q. Feng email@example.com

In this study, a four-span, 224m long, post-tensioned concrete box girder bridge supported on single column piers was subject to a series of controlled vehicle tests. Bridge acceleration response datasets were used to study the effect of truck speed and a sudden stop, on the modal identification of the bridge structure. Natural frequencies and mode shapes of the bridge were determined using the frequency domain decomposition technique for all datasets. The passing of the truck rendered difficult to identify the first bridge frequency. Conversely, the vehicle tests improved the identification of higher vibration modes. This is because the truck preferentially excites the bridge vertical response, which is associated with higher modes of vibrations, especially when a sudden stop of the vehicle occurs. Thus, carefully conducted vehicle-crossing tests provide detailed information about the bridge structure dynamics in the vertical direction. However, to identify lower modes, no vehicle on the bridge is preferred.

 2017-06-13T16:44:39+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/82 Effect of time step size on stress relaxation 2017-03-10T07:21:09+03:00 Abdullah Fettahoğlu firstname.lastname@example.com

Many materials used in industry show time and temperature dependant stress strain relationship. While essentially most of the materials exhibit stress relaxation or in general viscoelastic material properties, some of them are assumed as linear elastic to be able to make their stress calculations simpler. On the contrary, there are some materials showing intense viscoelastic stress strain relationship even at lower temperatures and short time periods. Most of these materials are employed in construction industry as pavements on roads or bridges and needed a better understanding of their viscoelastic material properties and calculation methods for their design. For a better understanding and comparison between several material products in industry, their stress strain behavior shall be evaluated. Stress relaxation of materials, which shows time and temperature dependant properties, is investigated in this paper. For that reason first, relaxation test results existed in the literature are used to verify the numerical stress relaxation calculation of commercial FEM program, ANSYS. Second, the determination of Prony series parameters and the commands to be entered in ANSYS to perform stress relaxation are given. Finally, the amount of error in the numerical calculation depending on time step sizes at different temperatures is presented.

 2017-03-10T07:21:09+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/87 Non-linear behaviour modelling of the reinforced concrete structures by multi-layer beam elements 2017-03-10T07:21:08+03:00 Mourad Khebizi firstname.lastname@example.com Hamza Guenfoud firstname.lastname@example.com Mohamed Guenfoud firstname.lastname@example.com

A two-dimensional multi-layered finite elements modeling of reinforced concrete structures at non-linear behaviour under monotonic and cyclical loading is presented. The non-linearity material is characterized by several phenomena such as: the physical non-linearity of the concrete and steels materials, the behaviour of cracked concrete and the interaction effect between materials represented by the post-cracking field. These parameters are taken into consideration in this paper to examine the response of the reinforced concrete structures at the non-linear behaviour. Two examples of application are presented. The numerical results obtained, are in a very good agreement with available experimental data and other numerical models of the literature.

 2017-03-10T07:21:08+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/215 Universal size effect of concrete specimens and effect of notch depth 2017-03-10T08:09:24+03:00 Sıddık Şener firstname.lastname@example.com Kadir Can Şener firstname.lastname@example.com

The universal size effect law of concrete is a law that describes the dependence of nominal strength of specimens or structure on both its size and the crack (or notch) length, over the entire of interest, and exhibits the correct small and large size asymptotic properties as required. The main difficulty has been the transition of crack length from 0, in which case the size effect mode is Type 1, to deep cracks (or notches), in which case the size effect mode is Type 2 and fundamentally different from Type 1. The current study is based on recently obtained comprehensive fracture test data from three-point bending beams tested under identical conditions. In this test, the experimental program consisted of 80 three-point bend beams with 4 different depths 40, 93, 215 and 500mm, corresponding to a size range of 1:12.5. Five different relative notch lengths, a/D = 0, 0.02, 0.075, 0.15, 0.30 were cut into the beams. A total of 20 different geometries (family of beams) were tested. The present paper will use these data to analyze the effects of size, crack length. This paper presents a studying to improve the existing universal size effect law, named by Bazant, using the experimentally obtained beam strengths for various different specimen sizes and all notch depths. The updated universal size effect law is shown to fit the comprehensive data quite well.

 2017-03-10T07:21:07+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/80 HVAC systems: measurements of airflows in small duct length 2017-03-10T07:21:06+03:00 Clito Félix Alves Afonso firstname.lastname@example.com

One of the most feasible ways to measure duct airflows is by tracer gas techniques, especially for complex situations when the duct lengths are short as well as their access, which makes extremely difficult or impossible other methods to be implemented. One problem associated with the implementation of tracer gas technique when the ducts lengths are short is due to the impossibility of achieving complete mixing of the tracer with airflow and its sampling. In this work, the development of a new device for the injection of tracer gas in ducts is discussed as well as a new tracer-sampling device. The developed injection device has a compact tubular shape, with magnetic fixation to be easy to apply in duct walls. An array of sonic micro jets in counter current direction, with the possibility of angular movement according to its main axle ensures a complete mixing of the tracer in very short distances. The tracer-sampling device, with a very effective integration function, feeds the sampling system for analysis. Both devices were tested in a wind tunnel of approximately 21m total length. The tests distances between injection and integration device considered were: X/Dh=22; X/Dh=4; X/Dh=2; and X/Dh=1. For very short distances of X/Dh=2 and X/Dh=1, semi empirical expressions were needed. A good reproducibility of airflow rate values was obtained. These preliminary tests showed that the practical implementation of tracer gas techniques in HVAC systems for measuring airflow rates with a very short mixing distance is possible with the devices developed.

 2017-03-10T07:21:06+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/89 Influence of blast-induced ground motion on dynamic response of masonry minaret of Yörgüç Paşa Mosque 2017-03-10T07:21:05+03:00 Olgun Köksal email@example.com Kemal Hacıefendioğlu firstname.lastname@example.com Emre Alpaslan email@example.com Fahri Birinci firstname.lastname@example.com

This paper focuses on the dynamic response analysis of masonry minaret of Yörgüç Paşa Mosque subjected to artificially generated surface blast-induced ground motion by using a three-dimensional finite element model. The mosque is located in the town of Kavak of Samsun, in Turkey. This study intended to determine the ground motion acceleration values due to blast-induced ground motions (air-induced and direct-induced) calculated by a random method. In order to model blast-induced ground motion, firstly, peak acceleration and the time envelope curve function of ground motion acceleration were obtained from the distance of the explosion center and the explosion charge weight and then blast-induced acceleration time history were established by using these factors. Non-stationary random process is presented as an appropriate method to be produced by the blast-induced ground motion model. As a representative of blast-induced ground motion, the software named BlastGM (Artificial Generation of Blast-induced Ground Motion) was developed by authors to predict ground motion acceleration values. Artificial acceleration values generated from the software depend on the charge weight and distance from the center of the explosion. According to the examination of synthetically generated acceleration values, it can be concluded that the explosions cause significant effective ground movements. In the paper, three-dimensional finite element model of the minaret was designed by ANSYS. Moreover, the maximum stresses and displacements of the minaret were investigated. The results of this study indicate that the masonry minaret has been affected substantially by effects of blast-induced ground motion.

 2017-03-10T07:21:05+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/84 Metaheuristic approaches for optimum design of cantilever reinforced concrete retaining walls 2017-03-10T07:21:04+03:00 Gebrail Bekdaş firstname.lastname@example.com Rasim Temür firstname.lastname@example.com

An approach is presented for optimum design of cantilever reinforced concrete (RC) retaining wall via teaching-learning based optimization (TLBO) algorithm. The objective function of the optimization is to minimize total material cost including concrete and reinforcing steel bars of the cantilever retaining wall by considering overturning, sliding and bearing stabilities, bending moment and shear capacities and requirements for design and construction of reinforced concrete structures (TS 500/2000). TLBO algorithm is a simple algorithm without any special algorithm parameters. This innovative approach is providing an advantage to TLBO in terms of easily applying to the problem. The proposed method has been performed on numerical examples and the results are compared with previous approaches. Results show that, the methodology is feasible for obtaining the optimum design of RC cantilever retaining walls.

 2017-03-10T07:21:04+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/133 Research on relation between natural frequency and axial stress of round bar with intermediate-supported ends 2017-03-10T08:09:24+03:00 Tsutomu Yoshida firstname.lastname@example.com Takeshi Watanabe email@example.com Kunihiko Sakurada firstname.lastname@example.com

In order to make a method be useful to measure an axial stress of a member by a natural frequency, we investigated a relation between a natural frequency and an axial stress of a round bar with intermediate-supported ends, the boundary condition of which was one between a fix-supported end and a simply-supported end. To define an intermediate-supported end condition, we adopted a parameter, a ratio of a moment of a force to a deflection angle at the end. It was shown theoretically that the parameter of an intermediate-supported end could be evaluated by one at a support on a continuous beam consisted of 3 spans. The 3-spanned beam has same vibration characteristics of a beam with intermediate-supported ends. We manufactured a test device of a 3-spanned beam by which we could simulate a vibration under various intermediate-supported end conditions. The theoretical relation and experimental results between a natural frequency and an axial stress agreed for the most part.

 2017-03-10T07:21:03+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/224 Analytical solution for bending and buckling response of laminated non-homogeneous plates using a simplified-higher order theory 2017-03-10T08:09:24+03:00 Ferruh Turan email@example.com Muhammed Fatih Başoğlu firstname.lastname@example.com Zihni Zerin email@example.com In this study, analytical solutions for the bending and buckling analysis of simply supported laminated non-homogeneous composite plates based on first and simplified-higher order theory are presented. The simplified-higher order theory assumes that the in-plane rotation tensor is constant through the thickness. The constitutive equations of these theories were obtained by using principle of virtual work. Numerical results for the bending response and critical buckling loads of cross-ply laminates are presented. The effect of non-homogeneity, lamination schemes, aspect ratio, side-to-thickness ratio and in-plane orthotropy ratio on the bending and buckling response were analysed. The obtained results are compared with available elasticity and higher order solutions in the literature. The comparison studies show that simplified-higher order theory can achieve the same accuracy of the existing higher order theory for non-homogeneous thin plate. 2017-03-10T07:21:02+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/245 Cover & Contents Vol.3 No.1 2017-03-10T07:21:01+03:00 Journal Management CJSMEC email@example.com 2017-03-10T07:21:00+03:00 Copyright (c) 2017 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/78 Thermoelastic stress analysis for detecting wrinkles and associated resin pockets in polymer composites 2017-02-18T17:30:33+03:00 Rani Elhajjar email@example.com Rami Haj-Ali email@example.com

A thermos elastic stress analysis method is proposed consisting of an array of infrared measurement sensors used for evaluation the wrinkling defects and associated resin pockets in a fiber reinforced polymer (FRP) composite structure. Wrinkling or fiber waviness defects results when out of plane distortions occur in some or all of the composite layers of the laminate. The wrinkles result in significant reductions of mechanical properties in the composite structure. The method involves instrumentation and device for application of internal energy in the material such as transient or cyclic mechanical excitations. These external excitations are induced in a prescribed or measurable cyclic or transient function of time. Infrared measurements from the surface of the composite are synchronized with the applied excitation energy. The results are used to provide for a map detailing the inner wrinkle defects and associated resin pockets in the laminated composite structure.

 2016-12-26T05:50:00+03:00 Copyright (c) 2016 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/212 Soft-story effects on the behaviour of seismically isolated buildings under near and far-fault earthquakes 2017-02-18T17:30:32+03:00 Savaş Erdem email@example.com Khalid Saifullah firstname.lastname@example.com

In this study, the effects of soft-story on the seismic behaviour of 3-story and 8-story isolated buildings under near and far-fault earthquakes were investigated. Four different structural models with two different 1st story height were designed: One with 1st story height of 3m and 2nd with 1st story height of 4.5m to capture soft story effect. The prototype fixed base buildings were converted to seismically isolated buildings by introducing rubber isolators at base level. Analyses were conducted by using two different isolation systems (QW7.5Tb3 and QW7.5Tb4). The modelling of conventional fixed base prototype seismically isolated buildings and their modal analyses were conducted on finite-element program SAP2000, whereas, modelling of seismically isolated buildings and nonlinear time-history analyses were conducted using 3D-BASIS program. The four accelerations records has been used for the time-history analysis. Floor accelerations, story shears and inter-story drift ratios were the key structural responses considered. The analysis results showed seismic isolations can be used as a viable mitigation method for the buildings with soft-stories under near and far-fault earthquakes. Based on the results obtained, it is interesting to note that all types of buildings whether with soft story or with typical story height show the same acceleration trend and close values (except top floor) for all types of isolation systems and earthquakes considered. In addition, both 3 and 8-story buildings suffered increase in interstory drifts beyond the limits defined UBC 97 under earthquakes containing long period pulses.

 2016-12-26T05:49:59+03:00 Copyright (c) 2016 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/86 Nonlinear finite element analysis of cold-formed steel plain angle columns 2017-02-18T17:30:32+03:00 Mustafa Durmaz firstname.lastname@example.com Ayşe Daloğlu firstname.lastname@example.com

The main objective of this paper is to provide an efficient and accurate finite element model to understand the behavior of cold-formed steel plain angle columns. The effects of initial local and overall geometric imperfections have been taken into consideration in the analysis. The material nonlinearities of flat and corner portions of the angle sections were incorporated in the model. Failure loads and buckling modes as well as load-shortening curves of plain angle columns were investigated in this study. The nonlinear finite element model was verified against experimental results. The finite element analysis was performed on plain angles compressed between fixed ends over different column lengths, and column curves were obtained.

 2016-12-26T05:49:59+03:00 Copyright (c) 2016 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/88 Wind loads for stadium lighting towers according to Eurocode 1 2017-02-18T17:30:32+03:00 Zeki Karaca email@example.com Hasan Tahsin Öztürk firstname.lastname@example.com Erdem Türkeli firstname.lastname@example.com

The determination of actions on structures is an important step of in the design process. In nature, so many outer and inner actions are acting on structures continuously. The two most important ones of those actions are the earthquake and wind actions. For some structures, i.e. towers, high chimneys or lighting towers, the priority of these two severe actions can change. Wind forces can become a governing force on the design of these structures. Therefore, the determination of wind forces for these tall, slender and wind-sensitive structures becomes very important. Also, these tall and slender structures have a high ratio of height to least diameter that makes them more slender and wind-sensitive than any other structures. In this study, the determination of wind loads for a selected and modeled stadium lighting tower was given according to Eurocode 1 which is an international well-known standard. This study showed that it is difficult to calculate wind loads of stadium lighting towers according to Eurocode 1 because of the complexity of the document, insufficient explanation of some formulas like resonant response factor and unclear graph sections for the reader. This study is believed to enlighten the way of the users of Eurocode 1.

 2016-12-26T05:49:59+03:00 Copyright (c) 2016 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/83 Optimum design of reinforced concrete columns employing teaching-learning based optimization 2017-02-18T17:30:31+03:00 Gebrail Bekdaş email@example.com Sinan Melih Niğdeli firstname.lastname@example.com

In structural engineering, the design of reinforced concrete (RC) structures needs an initial de-sign for cross sectional dimensions. After these dimensions are defined, the design constraints and the required reinforcement bars are calculated. But the required reinforcement area is not exactly provided since the size of rebars are fixed. At the end of the design, the security measures are provided, but the designer has no idea for the optimization of the design in mean of economy. For that reason, a powerful search methodology can be programed by using metaheuristic algorithms. In this study, optimum design of reinforced concrete columns was investigated by using an education based metaheuristic algorithm called teaching-learning based optimization (TLBO). In the methodology, the slenderness of the columns is also taken into consideration by using a simple approach given in the ACI 318 design code. In this approach, the factored design flexural moments are defined according to the buckling load and axial load of columns. The design variables of the problem include cross section dimension of the column and the detailed reinforcement design and the optimization objective is the minimization the maximum material cost of the column. Differently from the other metaheuristic algorithms, the decision of the optimization type (global or local search) is not defined by using a probability parameter in TLBO. In optimization, two phases of TLBO; teacher (global search) and learner (local search) phases are consequently applied in search of best design variables. The proposed approach is effective for the structural optimization problem.

 2016-12-26T05:49:58+03:00 Copyright (c) 2016 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/79 Bonded particles models of rock plates with circular cavities in uniaxial and biaxial compression 2017-02-18T17:30:31+03:00 Michail A. Lotidis email@example.com Pavlos P. Nomikos email@example.com Alexandros I. Sofianos email@example.com

In this paper, a distinct elements code is used to perform a numerical investigation for the size and stress gradient effects on the fracture initiation and propagation around single or pairs of pre-existing cavities in brittle rock. To investigate the rock fracture around cavities and to assess the potential of the numerical model to simulate this behavior, published laboratory physical model on granite is simulated numerically with a Bonded Particles Model (BPM). The numerical model is presented and the calibration of the BPM micro-parameters is described. Then, the calibrated BPMs are used to investigate the effect of the size of the cavity on the primary, secondary and side wall fracturing, as well as on the fracturing modes. Moreover, BPMs with two circular cavities were used to study the interaction of these holes of the same diameter and to investigate the importance of their relative distance. Finally, the simulated material was studied by biaxial tests on BPMs with a pre-existing hole.

 2016-12-26T05:49:58+03:00 Copyright (c) 2016 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/81 High strain rate and quasi-static compression behavior and energy absorption characteristic of PVC foam 2017-02-18T17:30:31+03:00 Zhang Wei email@example.com Ye Nan firstname.lastname@example.com

The mechanical properties at room temperature of two densities PVC foams have been experimentally evaluated in both quasi-static and dynamic compression loading conditions. The strain rate effect have been evaluated by comparing the constant strength during plateau region. Energy absorption efficiency of PVC foam is investigated, and it shows that in certain density range, the efficiency of lighter PVC foam is larger than that of heavier PVC foam, but the efficiency stress of lighter PVC foam is smaller than that of heavier PVC foam. While the lighter PVC foam has been compressed more than heavier PVC foam when they reach their peak efficiency. Therefore, for a certain density of PVC foam itself, when the loading rates increase, the PVC foam will absorb more energy more efficiently.

 2016-12-26T05:49:58+03:00 Copyright (c) 2016 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/91 Assessment of aerodynamic response of the Nissibi cable-stayed bridge using three-dimensional computational fluid dynamics 2017-02-18T17:30:32+03:00 Savaş Erdem email@example.com İrem Yağmuroğlu email@example.com Khalid Saifullah firstname.lastname@example.com

Aerodynamic behavior has the greatest impact on long-span bridges and is the most important factor in the design of cable stayed bridges, which should not be overlooked. CFD (Computational Fluid Dynamics) is the most widely used technique, among bridge engineers, to predict wind speed, direction and vortex-shedding form before conducting wind tunnel tests. In this study, a bi-directional CFD analysis with the wind flow parallel and perpendicular to Nissibi Bridge's, which has a main span of 400 m and claimed the spot of Turkey's 3rd largest bridge, deck cross-section has been performed by approximate modelling of the bridge and the surrounding structures. The study is done by using CFD++ software/computer program. The results showed that the effect of wind acting on x direction of impact with 30 m/s has caused turbulence and vortex on conjugation area of the tower and it is observed that the upside down Y shape of the tower breaks down the balance of wind flow. However, bridge deck is not exposed to serious amount of vortex influence due to the wind on y direction. In addition, the analysis revealed that maximum pressure distribution occurred on vertical surface of the tower and it increases in direct proportion to the height of the tower.

 2016-12-26T05:49:58+03:00 Copyright (c) 2016 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/213 Cover & Contents Vol.2 No.4 2016-12-26T05:49:57+03:00 Journal Management CJSMEC firstname.lastname@example.com 2016-12-26T05:49:51+03:00 Copyright (c) 2016 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/77 Cover & Contents Vol.2 No.3 2016-09-29T16:36:27+03:00 Journal Management CJSMEC email@example.com 2016-09-29T00:00:00+03:00 Copyright (c) 2016 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/70 Energy & crack tip stress interactions in mixed mode I/III fracture of DX51 steel sheets 2017-02-18T17:30:29+03:00 Claire De Marco Muscat-Fenech email@example.com Stephen Ciappara firstname.lastname@example.com

DX51D sheet is subjected to mixed mode I/III loading in a purposely designed fixture apparatus. The resulting stable crack-tip growth, direction, slant angle and typical factory-roof crack were observed and discussed as the loading mixity was varied. The total essential work of fracture or fracture toughness, for each mixity loading, was evaluated adopting energy methods during experimentation, whilst theory details how the total may be separated into its individual mode components. The fracture type and direction of crack path were based on the von Mises failure theory and the fracture criteria of maximum shear stress, maximum hoop stress and maximum normal stress along with the application of Hill's theory. The findings described clearly establish the link between the applications of the energy based equations governing crack initiation and propagation and the equations describing the stress field surrounding the crack tip in the mixed mode I/III field.

 2016-09-29T00:00:00+03:00 Copyright (c) 2016 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/74 Experimental verification of blade elongation and axial rotor shift in steam turbines 2017-02-18T17:30:27+03:00 Pavel Procházka email@example.com

The experimental research of static and dynamic characteristics of rotating parts of turbomachines is a very important part of the design and verification of the machine parameters as well as optimization of their operational regimes. The described method of measuring dynamic and static characteristics, especially blade elongation and rotor axial shift, are based on the utilization of the non-contact magnetoresistive sensors developed in the Institute of Thermomechanics AS CR. These sensors exhibit positive properties for this purpose.

 2016-09-29T00:00:00+03:00 Copyright (c) 2016 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/66 Girkmann problem with a Discrete Element Method 2017-02-18T17:30:28+03:00 Christian Mariotti firstname.lastname@example.com

Cells of Voronoï are used as particles in the Discrete Element code CeaMka3D. This type of meshing does not leave geometrical space like that can be the case with spherical particles. This method has already been used successfully to simulate the propagation of seismic waves in a linear elastic medium in 2D or in 3D. In this paper, a specific axisymmetric formulation is presented. In a first part, the calculation of the volumetric deformation of a particle and the forces between particles are described. In a second part, the specific forces for the axisymmetric formulation are described. At last, this formulation is tested for the Girkmann problem. This axisymmetric benchmark has been presented in January 2008 by the International Association of Computational Mechanics (IACM) in order to test the singularity at the junction between shell and beam. The accuracy of the axisymmetric formulation for this Discrete Element Method is evaluated by this benchmark. The results of this Discrete Element Method are compared with others numerical methods.

 2016-09-29T00:00:00+03:00 Copyright (c) 2016 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/68 Assessment of bonding defects in FRP reinforced structures via ultrasonic technique 2017-02-18T17:30:28+03:00 Emma La Malfa Ribolla firstname.lastname@example.com Mohsen Rezaee Hajidehi email@example.com Giuseppe Fileccia Scimemi firstname.lastname@example.com Antonino Spada firstname.lastname@example.com Giuseppe Giambanco email@example.com

Fiber reinforced polymer (FRP) composite systems are widely used for the rehabilitation of concrete structures such as building that need to resist to seismic loads, bridges that have to carry heavier traffic loads. The technique consists in bonding the composite plate to the concrete surface element in order to increase the flexural capacity. A proper attachment of the FRP plate to the concrete surface is necessary for the efficiency of the load transfer between the reinforcement and the substrate. In this work, the quality of composite bonding is characterized through ultrasonic testing. The proposed technique is relative to a time domain analysis of the ultrasonic signals and couples the Akaike Information Criterion (AIC), used as automatic onset signal detection, and the Equivalent Time-Length (ETL), used as an indicator of the quantity of energy propagating through the bonding. It has been tested both numerically and experimentally, in vitro, using samples with imposed well- known defects.

 2016-09-29T00:00:00+03:00 Copyright (c) 2016 TULPAR Academic Publishing http://challengejournal.com/index.php/cjsmec/article/view/71 Transient resonance in limited power systems 2017-02-18T17:30:28+03:00 Jerzy Michalczyk email@example.com Grzegorz Cieplok firstname.lastname@example.com

Difficulties in obtaining – by means of known methods - the proper estimation of maximum amplitudes in the transient resonance of technical systems, were indicated in the paper. It was proved that models of 1 degree of freedom cannot be used for such systems. The energy method of estimating maximum amplitudes in the transient resonance - useful also for systems of several degrees of freedom and multiple drives - was proposed. Taking into account interactions between the rotor and body motion of vibratory machines case the nomogram method for investigating resonance amplitude for coast-down phase was also presented.

 2016-09-29T00:00:00+03:00 Copyright (c) 2016 TULPAR Academic Publishing


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Table of Contents:
Fragments of Book 9
Fragments of Book 10
Fragments of Uncertain Provenience
Book XI
Book XII
chapter 55
chapter 72
Book XIII
chapter 45
chapter 106
Book XIV
chapter 17
chapter 82
Book XV
Book XVI
chapter 52
chapter 68
Book XVII
chapter 7
chapter 43
When the sea-battle had ended as we have related, the Athenians sailed off at the time to Sestus, since it was already night, but when day came they collected their ships which had been damaged and set up another trophy near the former one.1 [2] And Mindarus about the first watch of the night set out to Abydus, where he repaired his ships that had been damaged and sent word to the Lacedaemonians for reinforcements of both soldiers and ships; for he had in mind, while the fleet was being made ready, to lay siege with the army together with Pharnabazus to the cities in Asia which were allied with the Athenians. [3] The people of Chalcis and almost all the rest of the inhabitants of Euboea had revolted from the Athenians2 and were therefore highly apprehensive lest, living as they did on an island, they should be forced to surrender to the Athenians, who were masters of the sea; and they therefore asked the Boeotians to join with them in building a causeway across the Euripus and thereby joining Euboea to Boeotia.3 [4] The Boeotians agreed to this, since it was to their special advantage that Euboea should be an island to everybody else but a part of the mainland to themselves. Consequently all the cities threw themselves vigorously into the building of the causeway and vied with one another; for orders were issued not only to the citizens to report en masse but to the foreigners dwelling among them as well, so that by reason of the great number that came forward to the work the proposed task was speedily completed. [5] On Euboea the causeway was built at Chalcis, and in Boeotia in the neighbourhood of Aulis, since at that place the channel was narrowest. Now it so happened that in former times also there had always been a current in that place and that the sea frequently reversed its course, and at the time in question the force of the current was far greater because the sea had been confined into a very narrow channel; for passage was left for only a single ship. High towers were also built on both ends and wooden bridges were thrown over the channel. [6] Theramenes, who had been dispatched by the Athenians with thirty ships, at first attempted to stop the workers, but since a strong body of soldiers was at the side of the builders of the causeway, he abandoned this design and directed his voyage toward the islands.4 [7] And since he wished to relieve both the citizens and the allies from their contributions,5 he laid waste the territory of the enemy and collected great quantities of booty. He visited also the allied cities and exacted money of such inhabitants as were advocating a change in government. [8] And when he put in at Paros and found an oligarchy in the city, he restored their freedom to the people and exacted a great sum of money of the men who had participated in the oligarchy.
1 Cp. chap. 40.6.
2 Soon after the Athenian disaster at Syracuse (Thuc. 8.95).
3 Strabo (Strabo 9.2.2) quotes Ephorus to the effect that a bridge only two plethra (202 ft.) long spanned the Euripus at Chalcis.
4 i.e. of the Athenian Confederacy.
5 Toward the cost of the war with the Lacedaemonians.
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|Posted by Quinne Darkover on May 20, 2013 at 3:55 PM
On Sat May 20 at 6:30 am, The final words were written. Now I get to print the whole thing out and start doing edits. I do want to add, increase or change some descriptions. I also need to fix a ton of passive voice sentences. Yep, I have to fix spots that are tell and not show. Then I need to find a good Beta Reader, Then hire a proofer. I also need to get some cover art.
Not publish ready yet, but it is a great deal closer.
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Hunterian Museum and Art Gallery
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Plagioclase crystal; glass case; text panel
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Exhibition History:
Nomadic Landmass, doggerfisher, Edinburgh; Camden Arts Centre, London, 2005
doggerfisher, Edinburgh
Hunterian Art Gallery
Ilana Halperin
Other Funders
Icelandic Mineral Sample 18 2005
Ilana Halperin (born 1973, Iceland)
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Copyright: Copyright The Artist; Image courtesy of the Artist and doggerfisher, Edinburgh
"A man named Mike at the Hunterian Museum in Glasgow examined a crystal shard found in October 2003 on the crest of the Eldfell volcano. He decided the specimen was either a piece of quartz from deep inside the earth that came up during the eruption and covered in a thin slip of molten rock. Or a shard of glass from a window pane which shattered as lava filled a house and later caught in the tread of someone's boot and prised loose by magma as they worked to save the harbour". (Ilana Halperin, Label text; Nomadic Landmass, Doggerfisher, Edinburgh, 2005). For the most part, humanity rests comfortable in the thought that geological inquiry interrogates passages of time which are almost unfathomably of the 'not now'. Our experience of the geological 'now' is too apocalyptic to be confronted more closely than through the newsman's telescopic lens; earthquake, volcano and landslide all put before us challenges to our sense that geology is something that happened in the mists of time and humanity, by contrast, is what is happening now. There are, however, places on the planet where the relationship between the human and the geological undergoes a seismic shift; geologist or not, to take a journey through the landscape of Iceland is to realise that geological time is indefatigably 'now'. For an artist to make such a journey is to realise that cataclysmic human events, even at the most personal level, conceal and manifest themselves no less enigmatically in the individual than do the processes of geology in the shard, collected by Halperin, from the crest of the Eldfell volcano. The very encounter with a living landmass confounds our daily assumptions about relationships with our pasts, our presents and our futures. Once among the lava flows and steaming craters, geological process manifests itself as less cataclysmic entropy than creative energy - past catching up with future, the forces of entropy fusing with those of creativity.' Mungo Campbell, extracts from 'Journey through the surface of the Earth', published to accompany Ilana Halperin's art/science research residency, Nomadic Landmass (London), Camden Arts Centre, 2005.
Acquisition Details
Acquired from doggerfisher, Edinburgh, 2005
Purchased with funds from the National Collecting Scheme for Scotland which was originated and operated 2003-2006 by the Contemporary Art Society and supported by the National Lottery through the Scottish Arts Council.
View other works purchased during this phase


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Demolition Man
Today I dumped the debris from a kitchen renovation job I'm doing in Weston, MA. 940 pounds of plaster and wood. I love checking the slip to see the poundage. For some reason, making a house weigh less brings me great joy. When I start the demo phase on my house, however, trips with the van aren't going to cut it. Have to get some 30 yard containers in the driveway. If you call local disposal companies from the yellow pages, they will work with you on selecting the size container that best suits your project, and where to place it when it arrives. They charge by the container with a time cap and a weight cap and when you go over either of those then the price goes up.


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The usual occupants of the field seem unperturbed by their new, brightly coloured temporary neighbour, a set of LUL "S7" stock destined for more urban use on the Circle and District lines. Nos. 20302 and 20301 topped and tailed 8X09 with 20304 and 20305. This train is the move of new LUL "S" Stock from Old Dalby to Amersham and Neasden and normally reverses at Princes Risborough at around 23:35. The train ran on Wednesday 30th March 2011, but apparently there was a loco failure at Princes Risborough so the whole train was stabled on the stub of the Thame branch in order to get it out of the way until the train could be rescued. 11:10, Thursday 31st March 2011. Digital Image No. GMPI8415.
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Connect Events: Past Event - Making Your Business Work For You
28 September 2017
At our recent Connect Event, Making Your Business Work For You, we were fortunate to hear from a panel of small business owners on business plan preparation, steps for taking planned and unplanned leave, setting up a support network and maintaining a positive work/life balance.
Our speakers included Benjamin Trinh from Life Ready Physio & Pilates, Helen Pow from The Little Posy Co., Brian Greedy from Brian Greedy Business Solutions, and facilitated by Kate Eccles from Bankwest, who shared their unique insights and real life experiences. Please find below the full video presentation from the evening as well as some of the key takeaways from our panellists.
Key takeaways
On the challenges for small business owners
"I often ask companies, 'what was your purpose of going into business?'. You typically get a response that it was to make money and to have a better lifestyle, but then the next question is, 'how is that going?'. Quite often it's the lifestyle which is disappearing." – Brian
On the benefits of taking time off
"Having that time off to step away made me realise that I don't necessarily need to be in charge of the day to day. That freed me up to step back and work more on the business plan and strategy." – Helen
On setting habits to take time off
"I have a routine that I take July off every year during my birthday to reflect and think and I've been doing that since I was 14 years old. I was 22 and I thought, 'I can't do it this year because I have the business'. But I thought, 'no, I am setting a precedent here. If the business is going to dictate my life, that's going to be a precedent I am setting.' I came back (from time off) and the business still existed, and I learnt a lot from that experience." – Ben
"You need to stand back and ask yourself, 'what's the business about and is the business there to build a better life for you?'. If you agree with that, then you can ask yourself, 'how can you be creative about taking some time off, how do I schedule that?'. – Brian
On creating a positive work/life balance
"Work/life balance is a myth, there's just life. The reality is you have to work on alignment between the two." – Ben
"I can't see too many people, when they are very old and grey and ill, saying, 'my only regret was that I didn't spend more time in the business'." – Brian
On hiring good support staff
"Make sure you have a good job description so that they are clear on what their role is and there is no confusion." – Helen
"I tell all our partners that the most important decision that you're going to make is the first person you hire, because that's the person who is going to be there when you need help." – Ben
"Hire on attitude and train on skills, that's always worked for me." – Brian
On finding a mentor
"I'd like to think that most small businesses would have a mentor. They don't necessarily need to know the ins and outs of your business, but they can provide an objective view about business." – Brian.
On promoting and upskilling staff
"She had that drive that I felt she wanted to take on that extra responsibility, and she really understood what we were trying to do and what the brand represented." – Helen
"We have also built a training pipeline where we identify future leaders in our business and train them." – Ben
On creating managing procedures for staff
"You do get to a point where you feel like you're just a checklist monkey. You have got to make room for autonomy and innovation and that entrepreneurial spirit." – Ben
On being able to delegate work
"You can't do it on your own, you need people, you need processes, and you need courage in yourself to hand over trust to those people." – Ben
"A lot of small business people have got into a routine of non-stop work. They can't delegate, they can't move it on to anyone else, they are just stuck." – Brian
"I have some really great, loyal staff. One in particular who I thought was really across everything in the business. I promoted her to manager. She took that on wholeheartedly and just ran the show while I was away." – Helen
On developing a business plan
"Most small business owners have their plan in their head, but that isn't enough." – Brian
"I find when you have personal clarity, it helps with your business plan a lot. Because otherwise, the business plan is just, 'make a lot of money' or 'grow big'." – Ben
"What do you want personally and how does the business fit with that?" – Helen
Kate Eccles
Benjamin Trinh
Helen Pow
Brian Greedy
The information contained in this article is of a general nature and is not intended to be nor should it be considered as professional advice. You should not act on the basis of anything contained in this publication without first obtaining specific professional advice. To the extent permitted by law, Bankwest, a division of Commonwealth Bank of Australia ABN 48 123 123 124 AFSL/Australian credit licence 234945, its related bodies corporate, employees and contractors accepts no liability or responsibility to any persons for any loss which may be incurred or suffered as a result of acting on or refraining from acting as a result of anything contained in this publication.


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text:
Question about Toshiba Satellite A65-S126 Notebook
Posted by shidoni2001 on
You can visit www.pcsupport.toshiba.com
You can search your laptop model there and the specifications of your Toshiba laptop.
Posted on Apr 07, 2010
SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
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Posted on Jan 02, 2017
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Saturday, July 02, 2011
One 'official opinion'...
"No British government has been in a stronger position"...David Blackburn in The Spectator quoting one official aide. Will it make the slightest bit of difference? Do you care? The European Union's budget of one trillion Euros was called 'relatively small': I'd be happier with about 9 fewer zeros; will David Cameron really secure a consensus to reject anything but a "0 per cent real terms rise for the 2013-2020 Budget round"?
Also, worth commenting on the news [deserves a post to itself really] that George Osborne objected to Britain's involvement in the eurozone bail-out and specifically asked "[Mr Darling] to be careful not to commit the UK to proposals that have a lasting effect on UK public finances"; nevertheless, later the same day Darling did the opposite and tied UK tax-payers' money into the bail-out fund. The following day Darling left office. Remember, the money being shovelled by various routes to the insatiable, greedy, gaping maw of the EU is SEVERAL TIMES the amount being "cut" by the Coalition: so, where is the outrage? Yes I know I've said it before; where are the marches? Where are the Unions? Where are the raving looney scraggly-bearded dodo Marxist Archbishops and hypocitical Polly Trots? I can't hear them. The current scene of the saga isn't a tragedy, it's a farce.
5 comments:
- Paul said...
The Osborne-Darling thing is old news and I'm surprised why it's resurfaced this week.
Back to Greece it's beyond our grasp. The Coalition said they could do a better job than Labour so they are being given their chance.
Of course Greece will default, as will Ireland, Portugal and Spain - all economies suffering from low growth and high inflation having to service loans set by richer nations who assume that everybody's means of settlement are the same because they are all within one union. As I've said before debt is not the problem, servicing the debt is. Greece has the highest state pensions in the EU, three times the level of British state pensions as a percentage of average pay, all financed by the political dream of the EU. Everybody could see it coming ages ago but nobody believed it would happen and now it is what can ordinary people do? A lot of people didn't want the banks bailed out in this country and their voices weren't heard.
- Sat Jul 02, 05:28:00 pm BST
- Span Ows said...
I know it's old news and I am pretty sure I have blogged it before too, not sure why it's cropped up...maybe to boost Cameron before the Euro budget meeting and boost even more Osborne's kudos.
Debt, indeed, that's why the UK isn't in "as much" trouble, we have more debt but it's also 'worth' more because the UK is seen as a decent bet.
"back in" 2008/09 I remember on the R5LMB bringing up the subject of countries leaving/being kicked out and was "laughed" off the thread.
- Sat Jul 02, 06:54:00 pm BST
- Paul said...
It's times like these you might wish you were a Chinese banker.
- Sat Jul 02, 06:57:00 pm BST
- Span Ows said...
The future's bright; the future's orange...or maybe Mandarin.
- Sun Jul 03, 09:03:00 am BST
- The Great Gildersleeve said...
We probably could afford most of our costs regarding, Welfare, The NHS and other things you can think of if we were still not borrowing as much as we are giving away as foreign aid(ringfenced)towards the cost of running the EU, getting involved in further wars and so on.
The other main problem is that most jobs are unable to or do not pay a decent living wage and so many in work or out of work struggle but both thanks to spin and the media at each other's throats instead of working together and many who work still need financial help from the Government in tax breaks or credits of some kind.
- Sun Jul 03, 04:50:00 pm BST


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Wednesday, 1 December 2010
Petrobras discovers new crude deposit in the Amazon
Petrobras has discovered a new crude deposit in the Amazon region, where it is currently developing large natural gas reserves. The new discovery was confirmed after extensive tests in the town of Tefe, approximately 630km from the city of Manaus in the Brazilian Amazon.
The crude deposit is located 32km from the Urucu oil province, where Petrobras is in the process of developing three natural gas deposits that supply Manaus. According to the company, the new discovery is high-quality light oil with an American Petroleum Institute gravity of 46 degrees.
Despite the fact that the exploratory well's capacity of 2,500 b/d is comparatively small, Petrobras is optimistic and said that the well test was "excellent considering that type of basin".
In an official statement released shortly after the new discovery, Petrobras said that it will conduct more seismic studies and test drills to determine the size of the Amazon deposit and assess its commercial viability.
Source: Sinchew
For more news and expert analysis about Brazil, please see Brazil Focus.
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Delven House was restored & converted into a block of six apartments by the current vendors in 2008 and is located in the very heart of Castle Donington village. The six self contained apartments each have their own gas fired central heating, intercoms, fully equiped kitchens & bathrooms.
OPEN HOUSE THIS BANK HOLIDAY WEEKEND SATURDAY 26TH FROM 12PM - 1PM. Please call to register your interest on 01332865568.
An extended and spacious four bedroom detached family house in a popular cul de sac location. The property benefits from having an entrance hallway, lounge, dining room, a kitchen/breakfast room, four double bedrooms, two en suites, a driveway, garage & an enclosed rear garden. Viewings recommended.
Rose cottage is a bright, characterful three-bedroom detached cottage, recently decorated and well maintained. It has a lounge/diner, sitting room, conservatory, fitted kitchen, three bedrooms and upstairs bathroom. There is a driveway , courtyard style gardens and brick outhouse.
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Mobile apps development company Hyderabad, IPhone , Android app developers, PHP, Python application development company
submitted 6 months ago, Monday, Dec 11, 2017, 22:41:18 by possibilliontech3 in Business
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Patterns of Awakening
August 19, 2009
A Unique Encounter: Patterns of Awakening
with Jean Houston, Marc Gafni, and Diane Musho Hamilton
Dr. Jean Houston, scholar, philosopher and researcher in human capacities, is one of the foremost visionary thinkers and doers of our time, and one of the principal founders of the Human Potential Movement. Here she speaks with Marc Gafni and Diane Musho Hamilton about the emergence of a new kind of spirituality that is beginning to appear all over the world, both from within the major traditions and from without—a newly integrated spirituality that begins to reconcile the split between science and religion, between evolution and mysticism, and between masculine wisdom and feminine compassion. Jean, Diane, and Marc don't just talk about what this new spiritual current looks like, but what it actually feels like from within, offering a precious glimpse of the Real through three very different sets of eyes….


text: Hi: Is there an "official" ATF rule that addresses the need to notify ATF if you add a 9 mm upper to a registered M16 or have multiple barrel assemblies with different barrel lengths? I have been told there is no requirement to notify ATF if you buy a 9 mm upper that can be switched out with the 5.56 upper. My gun is on a Form 5 as 5.56 mm with a 16" barrel. Any guidance will be greatly appreciated. Thanks.....David


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Diehards live for Elvis
Published 5:30 am, Thursday, September 27, 2007
The story behind Mean Gene Kelton's tribute to Elvis Presley is as interesting as the music itself.
Kelton and his longtime band the Diehards recorded 12 classic tunes in June at Sun Studios in Memphis, Tenn. The legendary studio was an early home to Presley, as well as Carl Perkins, Roy Orbison, Jerry Lee Lewis and Johnny Cash.
It was an essential environment for Kelton to properly commemorate the 30th anniversary of Presley's death. Ghosts of hits past were indeed welcome.
Kelton says he recorded the songs in the order they appear on the disc to capture a "live and raw" feel. (The disc is officially recognized by Elvis Presley Enterprises.)
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"I did not want to use click tracks or scratch-vocal tracks, and we did only very minimal overdubbing," the Houston performer says. "I wanted to capture the true, unpolished, raw sound and live feel of the band's unbridled enthusiasm."
Going Back to Memphis: A Biker Band Tribute to Elvis vividly captures Kelton's Southern-rock swagger and is a solid showcase for the Diehards' comfortable chemistry. A portion of the disc's proceeds benefit Bikers Against Child Abuse and St. Jude Children's Research Hospital in Memphis.
The disc is rooted, of course, by surefire favorites. Jailhouse Rock soars on a dirty Texas drawl, anchored by a screeching guitar riff and a searing harmonica. Heartbreak Hotel and Blue Suede Shoes are more faithful interpretations that benefit from Kelton's gruff but polished delivery — something he's honed for more than two decades.
Hound Dog gets the record's most radical reworking, and it works well. The call-and-response intro gives way to a hard-driving, blues-rock arrangement. It's guaranteed to get hips swiveling.
Kelton also makes a few interesting choices that keep the disc from being a kitschy karaoke effort. One Night With You is a sexy standout buoyed by Kelton's crooner vibe, and Steamroller Blues nicely captures the disc's Kelton-King duality. It's a blustery, sweaty blend of instrumentation and vocals.
Closing song and title track Going Backto Memphis is a charismatic original about "the second coming of Elvis." Kelton infuses the tune's bluesy framework with a rockabilly kick that's in sync with the rest of the disc's freewheeling vibe.


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The contest will be live till 11:59 PM, 02 August' 2015 .