不规则的“先滑后限”滑移隔震结构双向水平地震反应分析  

Analysis of irregular“sliding,later limited”sliding isolation subjected to bi-directional earthquake

作　　者：张慧[1] 张超[1] 侯伟[1] 熊仲明[2] Zhang Hui;Zhang Chao;Hou Wei;Xiong Zhong-ming(School of Civil Engineeing,Shanxi Polytechnie Institute,Xianyang 712000,China;Xi'an University of Aehitecture and Technology,Xi'an 710055,China)

机构地区：[1]陕西工业职业技术学院土木工程学院,陕西咸阳712000 [2]西安建筑科技大学,陕西西安710055

出　　处：《工程抗震与加固改造》2021年第4期88-95,共8页Earthquake Resistant Engineering and Retrofitting

基　　金：陕西省教育厅专项基金(12JK0895)。

摘　　要：运用SAP2000有限元分析软件,以4层不规则的钢筋混凝土框架结构为研究对象,分别建立了在双向水平地震作用下基础固定结构、"一滑就限"的滑移隔震结构、"先滑后限"的滑移隔震结构的计算模型。对三种结构体系在不同工况下进行了结构动力响应(平动反应和扭转反应)的对比分析,由分析结果可知,"先滑后限"的滑移隔震结构在输入双向地震波作用时隔震效果较好,结构的变形更加均匀,受力更加合理。同时,对于存在明显偏心的不规则结构,采用"先滑后限"的滑移隔震体系后,限位器的刚度布置对减轻结构的扭转振动效应起着重要的作用,而且自滑区的存在使得扭转振动效应通过结构的摩擦滑移得到了调整和改善。Based on four-storey irregular reinforced concrete frame structure,calculation model of base fixed structure,"sliding,meanwhile limited"sliding isolation structure and"sliding,later limited"sliding isolation structure under bi-directional earthquake is established respectively by finite element analysis program SAP2000.The dynamic response(translational response and torsional response)of three kinds of structure system under different working conditions are compared,showing that"sliding,later limited"sliding isolation system has good isolation effect under bi-directional earthquake;meanwhile,for the obviously eccentric irregular structure,after using"sliding,later limited"sliding isolation system,the arrangement of stiffness of displacement-limited device plays an important role in reducing the response of torsional vibration of structure,and the response of torsional vibration of structure was adjusted and improved by friction sliding because of the free sliding zone,so as to provide a solution to the problem of structure brittle failure from torsional vibration.

关 键 词：先滑后限 滑移隔震 隔震效果 扭转反应 

分 类 号：TU352.1[建筑科学—结构工程]