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An evaluation of force-based design *** displacement-based design of jointed precast post-tensioned wall systems

Earthquake Engineering and Engineering Vibration 2006年第2期5卷 285-296页

作者： M. Ataur Rahman sri sritharan 414 Town Engineering building Iowa State University Ames IA 50011 USA 406 Town Engineering building Iowa State University Ames IA 50011 USA Associate Professor

The unique features of jointed post-tensioned wall systems, which include minimum structural damage and re-centering capability when subjected to earthquake lateral loads, are the result of using unbonded post-tensioning to attach the walls to the foundation, along with employing energy dissipating shear connectors between the walls. Using acceptance criteria defined in terms of inter-story drift, residual drift, and floor acceleration, this study presents a multiplelevel performance-based seismic evaluation of two five-story unbonded post-tensioned jointed precast wall systems. The design and analysis of these two wall systems, established as the direct displacement-based and force-based solutions for a prototype building used in the PREcast Seismic Structural Systems （PRESSS） program, were performed at 60% scale so that the analysis model could be validated using the PRESSS test data. Both buildings satisfied the performance criteria at four levels of earthquake motions although the design base shear of the direct displacement-based jointed wall system was 50% of that demanded by the force-based design method. The study also investigated the feasibility of controlling the maximum transient inter-story drift in a jointed wall system by increasing the number of energy dissipating shear connectors between the walls but without significantly affecting its re-centering capability.

关键词： concrete precast unbonded post-tensioning wall building code performance-based evaluation force-baseddesign direct-displacement based design

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