基于中日规范强震作用下的隔震结构响应对比分析

摘要

In order to research the earthquake response of isolated building under medium and high level earthquake based on seismic design codes in China and Japan,a finite element model is buih according to a post-disaster reconstruction in Aba,Sichuan.Two recorded ground motions and three artificial ground motions are choosen.The two recorded ground motions are modulated to medium and high level of the seismic design codes in China,which makes the earthquake intensity PGA index as a AM parameter,At the same time,The two recorded ground motions are modulated to medium and high level under the seismic design codes in Japan,which make the earthquake intensity PGV index as a AM parameter.For the three artificial ground motions,one of which is made fitting the seismic response spectrum of Chinese seismic design code under high level earthquake.The medium level earthquake is got by modulating amplitude.The other two artificial ground motions fit the seismic response spectrum of Japanese seismic design code under medium and high level earthquake.Through comparative analysis of the earthquake response of isolated building under medium and high level earthquake set by seismic design codes in China and Japan,in particular,the maximum horizontal deformation of isolators,the maximum story displacement angle,the maximum story shear,the maximum absolute acceleration at top node,and the limit of seismic design codes in China and Japan,it can provide some reference for establishing seismic design codes in China.%为研究基于中国和日本抗震设计规范中震及大震对隔震结构地震响应影响,以四川省阿坝州灾后重建某综合楼为工程背景,建立了该综合楼的有限元模型.选取2条观测地震动以及3条人工地震动,对于2条观测地震动以PGA地震动强度指标为调幅参数,分别调幅至中国抗震设计规范的中震和大震水平.同时以PGV地震动强度指标为调幅参数,将2条观测地震动分别调幅至日本抗震设计规范的中震和大震水平.对于3条人工地震动,其中1条通过拟合中国抗震设计规范大震时的规范反应谱得出,按照中国抗震设计规范可以调幅得到中震水平的地震动.另外2条人工地震动分别通过拟合日本抗震设计规范中震及大震时的规范反应谱得到.通过对比分析隔震结构在中国和日本抗震设计规范中震及大震作用下的结构隔震层支座最大水平位移、最大层间位移角、最大层间剪力、顶层节点最大绝对加速度,以及中国和日本抗震设计规范相应的限值规定,以期能够为中国建筑抗震设计规范编制提供一定参考.