Seismic Fragility Evaluation of SCCB-Enhanced RC Frame Structures
Publication: Journal of Performance of Constructed Facilities
Volume 34, Issue 4
Abstract
A novel self-centering cable brace (SCCB) with friction devices was developed to improve the seismic performance of existing frame structures. To investigate the enhancing effect of the SCCB on reinforced concrete (RC) frame structures, seismic fragility evaluation of SCCB-enhanced RC frame structures was conducted based on the incremental dynamic analysis (IDA), through which probabilities of exceedance at various performance limit states are calculated. The proposed evaluation procedure was applied to a seismically deficient six-story RC frame, where buckling-restrained braces (BRBs) and SCCBs with similar damping properties were used and compared for strengthening effects. According to the IDA results, the seismic fragility curves of the two strengthening schemes were obtained. Compared with the BRB-enhanced frame, the SCCB-enhanced frame exhibits significantly better seismic capability under rare earthquakes. In addition, lower probability of exceedance is observed in the SCCB-enhanced frame under the repair available state, indicating that the SCCB-enhanced RC frame is more seismic resilient than the BRB-enhanced frame.
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Data Availability Statement
The test data in Fig. 4 are available from the corresponding author by request.
Acknowledgments
The authors would like to thank the support from the Ministry of Science and Technology of the People’s Republic of China under Grant No. 2018YFE0206100, the National Natural Science Foundation of China under Grant No. 51508251, the Program of the Six Major Talent Summit Foundation Grant No. JZ-062, and the Jinling Institute of Technology High-Level Personnel Work Activation Fee to Fund Projects Grant No. jit-b-201614.
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Published In
Journal of Performance of Constructed Facilities
Volume 34 • Issue 4 • August 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Jul 20, 2019
Accepted: Dec 16, 2019
Published online: Apr 28, 2020
Published in print: Aug 1, 2020
Discussion open until: Sep 28, 2020
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