1. Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology,
Lanzhou 730050, China; 2. Institute of Earthquake Protection and Disaster Mitigation, Lanzhou University of Technology,
Lanzhou 730050, China; 3. College of Civil Engineering, Wuhan University, Wuhan 430072, China
Abstract：Self-centering structures have been paid more and more attention in recent years due to their good seismic performance. The seismic performance evaluation of the self-centering structural system mostly focuses on maximum interstory drift ratio, peak floor acceleration, residual interstory drift ratio, etc. Less evaluation has been put on the comprehensive seismic performance of the self-centering structures. Based on the concept of seismic resilience, the self-centering energy dissipative braced (SCEDB) steel frame and self-centering buckling restrained braced (SC-BRB) steel frame were taken as case study and the incremental dynamic analysis was conducted on these two kinds of self-centering structures respectively. Then seismic fragility curves of these two structures were obtained. And the direct economic loss of the structures was then estimated. The recovery time and total loss of the structural system due to earthquake were evaluated based on the earthquake loss assessment model. Finally, three different recovery function models were used to compare the seismic resilience of the two self-centering structures, which provides reference for the seismic performance evaluation of the self-centering structural system.
