基于性能的自复位钢框架震后功能恢复能力量化分析

自复位结构由于具有较好的抗震性能，近年来得到学者的广泛关注。目前对自复位结构体系的抗震性能评估仍然集中在结构的最大层间位移角、楼层的峰值加速度和残余层间位移角等，而对该结构体系的综合抗震性能评估较少，因此基于功能恢复能力的概念，以自复位耗能支撑钢框架和自复位屈曲约束支撑钢框架为例，对两种结构分别进行增量动力分析，得到结构体系的地震易损性曲线。进而计算结构的直接经济损失，基于地震损失评估模型，评估结构体系震后的恢复时间和总损失。最后，采用三种不同的功能恢复函数模型，对比分析了两种自复位结构震后功能恢复能力，为自复位结构体系的抗震性能分析提供参考。

Performance-based seismic resilience quantification analysis of#br# self-centering steel frames

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.