主余震作用下钢框架-中心支撑结构抗震性能分析  

Seismic performance analysis of the concentrically braced frames under mainshock-aftershock sequences

作　　者：靳天姣 王纯 于海丰[1,2,3] 郝贵强 李志强 JIN Tianjiao;WANG Chun;YU Haifeng;HAO Guiqiang;LI Zhiqiang(School of Civil Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,China;Innovation Center of Disaster Prevention and Mitigation Technology for Geotechnical and Structural Systems of Hebei Province(Preparation),Shijiazhuang 050018,China;Engineering Technology Research Center for Intelligent&Low-carbon Assembled Building,Shijiazhuang 050018,China;Zhongtu International Architectural Design Co.,Ltd.,Shijiazhuang 050000,China)

机构地区：[1]河北科技大学建筑工程学院,河北石家庄050018 [2]河北省岩土与结构体系防灾减灾技术创新中心(筹),河北石家庄050018 [3]智能低碳装配式建筑技术研究中心,河北石家庄050018 [4]中土大地国际建筑设计有限公司,河北石家庄050000

出　　处：《地震工程与工程振动》2023年第5期204-212,共9页Earthquake Engineering and Engineering Dynamics

基　　金：河北省自然科学基金项目(E2021208010);中央引导地方科技发展资金项目(236Z5408G);石家庄市科学技术与研究发展计划(216160147A);河北省高等学校科学研究项目(QN2022122)。

摘　　要：为研究余震对钢框架-中心支撑结构抗震性能的影响,以钢框架-拉链柱式中心支撑结构和传统钢框架-人字形中心支撑结构为例,基于增量动力分析方法,对2种结构在主余震、主震作用下进行地震易损性分析。对比了2种结构地震易损性差异,根据抗倒塌储备系数评价了2种结构的抗倒塌性能。结果表明:余震会增加结构的地震易损性,其影响程度随着地震动强度的变大而增加;与人字形中心支撑结构相比,拉链柱式中心支撑结构在高强度地震下处于重度损伤和倒塌2种极限状态时的失效概率更低,抗倒塌储备系数更大,抗倒塌性能更优。In order to study the effect of aftershocks on the seismic performance of the concentrically braced steel frames,the seismic fragility analyses under mainshocks and mainshock-aftershock sequences were performed for the zipper braced frames(ZBF)and the conventional chevron braced frames(CBF)using the incremental dynamic analysis.The seismic fragility discrepancies between the ZBF and the CBF were compared and analyzed.In addition,the collapse resistance performance of the structures was evaluated using the collapse margin ratio.The results show that the aftershocks increase the seismic fragility of the structures,and the effect of aftershocks becomes more pronounced with increasing seismic intensity.In comparison to the CBF,the ZBF has lower failure probability for extensive damage and collapse limit states under high-intensity earthquakes,larger collapse margin ratio,and superior collapse resistance performance.

关 键 词：主余震 中心支撑结构 失效概率 地震易损性 抗倒塌性能 

分 类 号：TU391[建筑科学—结构工程] TU317.1