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Earthquake Analysis of Reinforce Concrete Framed Structures with Added Viscous Dampers

This paper describes the development of a numerical finite element algorithm used for the analysis of reinforced concrete structure equipped with shakes energy absorbing device subjected to earthquake excitation. For this purpose a finite element program code for analysis of reinforced concrete frame buildings is developed. The performance of developed program code is evaluated by analyzing of a reinforced concrete frame buildings model. The results are show that using damper device as seismic energy dissipation system effectively can reduce the structural response of framed structure during earthquake occurrence. HE application of modern control techniques to diminish the effects of seismic loads on building structures offers an appealing alternative to traditional earthquake resistant design approaches. Over the past decade there has been significant research conducted on the use of damper devices for dissipating seismic energy. Recently many investigations have been conducted to evaluate and analyze the seismic response of structures equipped different types of damper. Viscous dampers are known as effective energy dissipation devices improving structural response to earthquakes. The damping force developed by the viscous damper depends on the physical properties of the fluid used in the device. (1) In the other hands, the role of viscous damping in preventing buildings from collapse during intense earthquake ground motion was extensively investigated by using numerical modeling. (2), (3) Also some numerical studies are performed to evaluation influence of structural passive supplemental damping systems on structural and nonstructural seismic fragilities of buildings (4). Comparison of the fragility on building with and without passive control systems indicated that the viscous dampers are very effective in attenuating seismic structural response. (5) Due to the widespread technique for computer simulation and analyzing of structures with supplemental dampers subjected to steady-state excitation is direct integration technique which is generally implemented in finite element method. (6). In the present study an effort has been made to development of finite element program code for analysis of reinforced concrete frame buildings with supplemented viscous dampers device. Then application of the developed program code is shown by analysis of a reinforced concrete framed building subjected to earthquake though this program.