Seismic Retrofit of Framed Buildings Using Self-Centering PC Frames
Publication: Journal of Structural Engineering
Volume 146, Issue 10
Abstract
In this study, self-centering post-tensioned precast concrete (PC) frames are developed for seismic retrofit of reinforced concrete (RC) framed structures. The cyclic loading test of a RC frame retrofitted with a SC-PC frame is carried out to evaluate the effectiveness of the seismic retrofit. SC-PC frames are applied analytically for the seismic retrofit of three different reinforced concrete model structures using a simple design procedure based on the capacity spectrum method. The effectiveness of the retrofit scheme is investigated through nonlinear time-history response analysis (NLTHA), incremental dynamic analysis (IDA), and seismic fragility analysis. The analysis results indicate that the SC-PC frames are effective in reducing the maximum interstory drift ratio (MIDR) and eliminating the residual drift of the model structures. In addition, the proposed retrofit scheme is effective in increasing the median collapse capacities and decreasing the probabilities of reaching the design limit states of the RC structures.
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Acknowledgments
This research was carried out by research funding (Grant No. 19CTAP-C153076-01) of the Ministry of Land, Infrastructure and Transport, Land Transport Technology Promotion Research Project.
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Published In
Journal of Structural Engineering
Volume 146 • Issue 10 • October 2020
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Feb 27, 2019
Accepted: Apr 29, 2020
Published online: Jul 24, 2020
Published in print: Oct 1, 2020
Discussion open until: Dec 24, 2020
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