主余震序列作用对剪力墙结构动力响应影响分析

Analysis on influence of mainshock-aftershock sequence on dynamic response of shear wall structure

曾庆立 ¹管民生 ²王森 ³杜宏彪²

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作者信息

1. 深圳大学土木与交通工程学院,深圳 518060;深圳力鹏工程研究结构设计事务所有限公司,深圳 518034
2. 深圳大学土木与交通工程学院,深圳 518060
3. 深圳力鹏工程研究结构设计事务所有限公司,深圳 518034
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摘要

为了研究主余震序列作用对高层剪力墙结构动力响应的影响,以某超高层作为研究基础建立了其动力弹塑性分析模型,开展了相关研究工作.选取 10 个真实主余震序列作用事件,构造了 14 条主余震序列作用作为输入的地震荷载;以PGA、PGV、PGA/PGV等作为表征地震动强度的指标,计算了结构在主余震序列作用及仅主震作用下的结构塑性耗能、最大残余层间位移角的增量损伤比及Karl Pearson相关系数;分析了主余震序列作用下结构塑性耗能及最大残余层间位移角的特点和地震动强度指标与增量损伤比的相关性.结果表明,主余震序列作用加剧了结构损伤,其塑性耗能增量平均达 24%～28%;主余震序列作用下结构最大残余层间位移角有可能增大,也有可能减少.基于塑性耗能的结构主余震增量损伤比与PGV、SED、SI 等速度相关的地震动强度表征指标均表现出了较强的相关性,可考虑作为选择和调整主余震序列作用地震波的指标;基于最大残余层间位移角的结构主余震增量损伤比则与地震动强度指标相关性较弱.

Abstract

In order to study the influence of mainshock-aftershock sequences on dynamic response of high-rise shear wall structures,the dynamic elastoplastic analysis model of a super high-rise shear wall structure was established as the research object,and relevant research was carried out.Ten real mainshock-aftershock sequences were selected,and 14 mainshock-aftershock sequences were constructed as input seismic loads,PGA,PGV,PGA/PGV and other measures were used as indicators to characterize the intensity of ground motion,the structural plastic energy dissipation,the incremental damage ratio of the maximum residual inter-story displacement angle and the Karl Pearson correlation coefficient under the action of the mainshock-aftershock sequence and only the mainshock were calculated.The characteristics of the structural plastic energy dissipation and the maximum residual inter-story displacement angle under the action of the mainshock-aftershock sequence and the correlation between the ground motion intensity index and the incremental damage ratio were analyzed.The results show that the mainshock-aftershock sequence aggravates the structural damage,and the plastic energy consumption increases by 24%～28%on average.Under the action of the mainshock-aftershock sequence,the maximum residual inter-story drift ratio of the structure may increase or decrease.The incremental damage ratio of structural mainshock-aftershock based on plastic energy dissipation shows a strong correlation with the ground motion intensity characterization indexes related to PGV,SED and SI,which can be considered as an index for selecting and adjusting the seismic waves of mainshock-aftershock sequences.The incremental damage ratio of the mainshock-aftershock of the structure based on the maximum residual inter-story drift ratio is weakly correlated with the ground motion intensity index.

关键词

高层剪力墙结构/动力响应/主余震序列作用/塑性耗能/残余层间位移角

Key words

high-rise shear wall structure/dynamic response/mainshock-aftershock sequence/plastic energy dissipation/residual inter-story drift ratio

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出版年

2024

建筑结构

中国建筑设计研究院亚太建设科技信息研究院中国土木工程学会

建筑结构

CSTPCD北大核心

影响因子：0.723

ISSN：1002-848X

参考文献量7

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