考虑我国场地土类型的弹塑性反应谱法在高层混合结构中的应用  

The application of elasto-plastic response spectrum analysis to a hybrid structure

作　　者：周颖[1] 卜一[1] 吕西林[1] 黄志华[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《地震工程与工程振动》2009年第2期57-65,共9页Earthquake Engineering and Engineering Dynamics

基　　金：973计划项目(2007CB714202);国家自然科学基金项目(50708071);上海市晨光计划项目(2007CG27)

摘　　要：弹塑性反应谱法中,强度折减系数、延性系数、周期之间的关系模型(R-μ-T关系)是影响计算结果的一个重要参数。各国学者考虑不同地震动记录、滞回模型、场地土条件、阻尼比等参数,提出了不同的模型,但在场地特征对关系影响上存在不同认识。本文按考虑我国场地土类型的模型,分别进行了某高层混合结构在设防7度、7.5度、8度、8.5度、9度下的弹塑性反应谱计算,得到了一系列结构最大层间位移角,并与增量动力分析(IDA)的结果进行了对比。分析表明,考虑我国场地土类型的高层混合结构弹塑性反应谱计算结果与IDA分析50%均值曲线吻合较好。本文计算结果可为弹塑性反应谱法在复杂高层结构中的应用提供基础。The selection of R -μ- T model is important to the elasto - plastic response spectrum analysis （ EP - RSA）. Various models were accordingly put forward considering ground motions, hysteric models, soil conditions, damping ratio, etc. However, there are different opinions on the effect of the site soil on the R -μ - T relationship. In this paper, the R -μ - T model, which was specifically proposed for Chinese soil condition, was selected for the EP - RSA of a hybrid structure under seismic intensity 7, 7.5, 8, 8.5, 9, respectively. The maximum inter-story drifts were obtained and compared with the results of incremental dynamic analysis （IDA）. It is concluded that the slope of EP-RSA agrees well with the mean value curve of IDA. The analytical results are helpful for the wide application of EP-RSA to complex structures.

关 键 词：弹塑性反应谱法 R-μ-T关系 增量动力分析 高层混合结构 

分 类 号：P315.957[天文地球—地震学]