ISU-CCEE Report 01/11
Granting or Sponsoring Agency
Precast/Prestressed Concrete Institute
Research Focus Area
This study focuses on the multiple-level seismic performance in terms of structural and non-structural damages of jointed precast post-tensioned wall systems through a dynamic analysis of precast buildings subjected to spectrum compatible ground motions of various intensities. The maximum transient interstory drift, residual interstory drift, and floor acceleration are considered as acceptance criteria for evaluating seismic performance of these systems subjected by four levels of ground motions. Interstory drift and floor acceleration are directly related to structural and non-structural damages, respectively. Two-dimensional non-linear finite element analytical models for jointed wall systems used in this study are validated against test results for a five-story test building. In designing this precast structural system, it is shown that traditional force-based design approach results in significantly higher level of design base shear compared to direct displacement-based design approach. After observing satisfactory performance in the five-story model building designed by the direct displacement-based approach, similar multiple-level seismic performance is evaluated for five-, seven- and ten-story buildings designed by the direct displacement-based method. These low to mid-rise full scale jointed precast post-tensioned wall systems also exhibit the maximum transition interstory drift, residual interstory drift, and floor acceleration within the acceptable limits. Therefore, it is recommended these systems may be utilized as primary lateral load resistant structural systems when designed by the economic approach of direct displacement-based design. Variation influence of building heights on the performance of this system is also examined.
Rahman, Mohammad A. and Sritharan, Sri, "Force-Based Vs. Displacement-Based Design of Jointed Precast Prestressed Wall Systems" (2011). Reports and White Papers. 12.