Research Initiation:  Seismic Behavior of Tiedback RetainingWalls
{'Code': '07030000', 'Directorate': {'Abbreviation': 'ENG', 'LongName': 'Directorate For Engineering'}, 'Division': {'Abbreviation': 'CMMI', 'LongName': 'Div Of Civil, Mechanical, & Manufact Inn'}}
{'SignBlockName': 'Clifford J. Astill'}
Tied-back (anchored) retaining walls formerly were used mostly                  to support temporary earth excavations.  However the use of                     this type of wall construction for permanent structures has                     recently become more widespread, especially along highway                       interchanges and as shoreline structures.  The advantages of                    this type of construction over the more conventional cantilever                 and gravity walls include lower cost for large wall heights                     (over 50 feet), and easier construction.  However, there are at                 present no rationally-based design procedures in use for these                  walls that account for seismic loading.  Due to the fact that                   tied-back walls have traditionally been used as temporary                       structures, very little research has been directed to the seismic               design of such structures.                                                                                                                                      This research project is an analytical investigation of the                     seismic response of flexible tied-back retaining walls.  It is                  directed toward determining and quantifying the mechanisms of                   earthquake load resistance that develop for this type of                        retaining structure.  Emphasis is being placed on evaluating the                response of systems comprising a range of wall and anchor                       geometries, while accounting for inelastic soil behavior.  The                  interaction effects of the system components (i.e. the wall,                    anchors, and soil) during seismic loading is being studied.  The                improved understanding of the contributions from various                        components to the dynamic response is being incorporated into                   preliminary design recommendations.  These recommendations                      lead to a design procedure that accounts rationally for the                     effects of earthquake loading.
{'FirstName': 'Thomas', 'LastName': 'Siller', 'EmailAddress': 'Thomas.Siller@colostate.edu', 'StartDate': '08/15/1988', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'Colorado State University', 'CityName': 'Fort Collins', 'ZipCode': '805232002', 'PhoneNumber': '9704916355', 'StreetAddress': '601 S Howes St', 'CountryName': 'United States', 'StateName': 'Colorado', 'StateCode': 'CO'}
{'Code': '1496', 'Text': 'GEOTECHNICAL II'}
{'url': 'https://www.nsf.gov/awardsearch/download?DownloadFileName=1988&All=true', 'xml': '8810172.xml'}