带脉冲效应近场纪录的概率地震反应分析

英文篇名：Probability-based Seismic Response Analysis of Near-field Motions
中文刊名：武汉理工大学学报
英文刊名：Journal of Wuhan University of Technology
作者：张海明 ; 易伟建 ; 邝世杰
英文作者：ZHANG Hai-ming1 ; YI Wei-jian1 ; KUANG Shi-jie2(1.Department of Civil Engineering ; Hunan University ; Changsha 410082 ; China ; 2.Guangzhou Pearl River Foreign Investment Architectural Designing Institute ; Guangzhou 510060 ; China)
中文关键词：近场脉冲 ; 不确定性分析 ; 超越概率 ; 多条带分析法
英文关键词：near-field pulse ; uncertain analysis ; exceeding probability ; multiple-stripes analysis
出版日期：2010-05-15
机构：湖南大学土木工程学院;珠江外资建筑设计院;
年：2010
期：09
出版单位：武汉理工大学学报

摘要

着重于研究一般框架结构在脉冲型近场地震纪录作用下的地震反应,并得到其均值和标准差。近场脉冲周期TP对结构的地震反应影响尤为重要,特别反映在层间位移比的竖向分布形式上。该文大致按照TP与结构周期T1的关系,把一般框架结构分为TP>T1和TPThis paper lies on investigating the seismic response of the normal moment frames undergoing the near-field records(NFR) with significant pulses signal.It is revealed that the seismic response values abide the lognormal distribution and the mean and the dispersion are also calculated.As we know,the relation between the fundamental period T1 of building and the pulse period Tp is significant on the structural seismic response,especially on the vertical distribution of inter-storey drift ratio.The structures are divided into two groups as the one of TP>T1 and another of TPof buildings under NFRs containing different TP will be observed here,respectively.Accordingly,the existing researches have demonstrated that the peak ground velocity(PGV) is an effective intensity measure.So we scale the value of PGV to be 40 cm/s,80 cm/s,120 cm/s,160 cm/sand 200 cm/s,respectively.Finally,The probability density function(PDF) of the response parameters(such as maximum inter-storey drift ratio) of the buildings under different intensity levels can be calculated.Simultaneously,The annual exceeding probability regression function λ(IM)=k0(IM)-k is adopted to evaluate the seismic hazard of the structures.And then,the IM-based approach is used to evaluate the mean annual exceeding probability of the seismic response,so the PDF of the seismic response of the buildings can be concluded,as encountering to the pulse-like records.

引文

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