隔震层竖向刚度对高层基础隔震结构的影响  

Effects of vertical stiffness of isolation layer on high-rise base isolated buildings

作　　者：苏键[1] 温留汉.黑沙 周福霖[1,2] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]广州大学工程抗震研究中心,广东广州510405

出　　处：《地震工程与工程振动》2010年第3期166-170,共5页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金重大研究计划"重大工程的动力灾变"重点项目(90815027)

摘　　要：高层隔震建筑的隔震层在罕遇地震作用下会产生拉应力。本文通过对一栋20层的高层隔震结构,分别采用等拉压刚度模型和不等拉压刚度模型进行动力非线性时程分析,研究叠层橡胶隔震支座竖向刚度模型对高层基础隔震结构动力响应的影响。研究表明,超出线弹性工作范围后,竖向等拉压刚度模型将会低估隔震层的竖向位移量,低估上部结构的动力响应。The vertical tensile stress in the isolation layer of isolated high-rise building will appear in severe earthquake.Elastic-plastic dynamic analysis of a 20-story reinforced concrete isolated high-rise building under severe earthquake loading is performed in this paper for studying the effects of vertical stiffness,equivalent compressive-tensile vertical stiffness model（ECTS） and non-equivalent compressive-tensile vertical stiffness model（NCTS） of the isolator on the dynamic responses.The analysis results show that,both displacement of the isolation layer and the acceleration of the structure will be underrated in the case of using ECTS model.

关 键 词：大高宽比 基础隔震 竖向刚度 高层隔震 

分 类 号：P315.966[天文地球—地震学]