远近场地震动对隔震建筑抗震韧性影响分析  

Analysis of the impact of near-field and far-field seismic motions on the seismic resilience of base-isolated buildings

作　　者：曾德民 雒元嘉[1,2] 杜志超 王心宇 Zeng De-min;Luo Yuan-jia;Du Zhi-chao;Wang Xin-yu(School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Multi-Functional Shaking Tables Laboratory,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;China Institute of Building Standard Design&Research,Beijing 100048,China)

机构地区：[1]北京建筑大学土木与交通工程学院,北京100044 [2]北京建筑大学大型多功能振动台阵实验室,北京100044 [3]中国建筑标准设计研究院有限公司,北京100048

出　　处：《工程抗震与加固改造》2024年第5期80-89,107,共11页Earthquake Resistant Engineering and Retrofitting

摘　　要：不同类型的地震动对隔震结构的地震响应和抗震韧性影响不同,为进一步探究其影响的差异,本文以北京地区某7层RC框架-剪力墙隔震结构为例,分别选取近场脉冲地震动、近场无脉冲地震动和远场地震动各11条进行设防地震和罕遇地震下的弹塑性分析计算及抗震韧性评价。分析结果表明:在地震作用下,远场地震动与近场无脉冲地震动响应相近;近场脉冲地震动对层间位移角、楼层加速度的影响远大于其他两类地震动,隔震层位移均值接近规定限值;近场脉冲地震动因其极大的地震响应导致抗震韧性评价各项指标远不如其他两类地震动,设防地震下远近场地震动均满足抗震韧性一星水准,罕遇地震下近场无脉冲地震动和远场地震动均满足韧性三星,而近场脉冲地震动只能达到韧性二星水准。研究结果可为地震灾害防范和隔震结构韧性设计提供参考。Different types of seismic motion have different effects on the seismic response and seismic resilience of isolated structures.To further explore the differences in their effects,a 7-story RC frame shear-wall isolated structure in Beijing is taken as an example in this paper.11 near-field pulse seismic motions,11 near-field non pulse seismic motions,and 11 far-field seismic motions are selected to conduct elastic-plastic analysis and seismic resilience evaluation of the isolated structure under precautionary and rare earthquakes.The analysis results indicate that under earthquake actions,the response of far-field seismic motion is similar to that of near-field non pulse seismic motion.The impact of near-field pulse seismic motion on inter story displacement angle and floor acceleration is much greater than the other two types of seismic motions,and the average displacement of the isolation layer is close to the specified limit value.Due to its extremely large seismic response,the seismic resilience evaluation indicators of near-field pulse seismic motions are far inferior to the other two types of seismic motions.Under precautionary earthquake,both near-field and far-field seismic motions meet the seismic resilience one star level,while under rare earthquakes,near-field non pulse seismic motions and far-field seismic motions meet the resilience three stars level.However,near-field pulse seismic motions can only reach the resilience two star level.The research results can provide reference for earthquake disaster prevention and resilient design of isolation structures.

关 键 词：RC框架-剪力墙 近场地震动 远场地震动 隔震 抗震韧性 设防地震 罕遇地震 

分 类 号：TU375.4[建筑科学—结构工程] TU352.11