Seismic Fragility Evaluation of SCCB-Enhanced RC Frame Structures

被引：5

作者：

Song, Yong-sheng ^{[1
]}

Guo, Tong ^{[2
]}

Wang, Ji-shuai ^{[2
]}

Xuan, Wei-hong ^{[1
]}

Chen, Yu-zhi ^{[1
]}

机构：

[1] Jinling Inst Technol, 99 Hongjing Ave, Nanjing 211169, Peoples R China

[2] Southeast Univ, Key Lab Concrete & Prestressed Concrete Struct, Minist Educ, 2 Sipailou, Nanjing 210096, Peoples R China

来源：

JOURNAL OF PERFORMANCE OF CONSTRUCTED FACILITIES | 2020年 / 34卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Self-centering; Cable brace; Strengthening; Frame structure; Seismic fragility evaluation; SELF-CENTERING BRACES; BEHAVIOR;

D O I：

10.1061/(ASCE)CF.1943-5509.0001450

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

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. (C) 2020 American Society of Civil Engineers.

引用

页数：11

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