曲面隔震结构在地震作用下动力特性研究  

Study on dynamic characteristics of curved isolation structure under earthquake action

作　　者：张杰 刘文光 王长虹 高鹏洲 ZHANG Jie;LIU Wenguang;WANG Changhong;GAO Pengzhou(Department of Civil Engineering,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学土木工程系

出　　处：《地震工程与工程振动》2019年第4期162-169,共8页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51478257,51778355)~~

摘　　要：利用曲面特性提升了传统摩擦滑移隔震层限位和复位的功能,建立了单向激励下曲面摩擦滑移隔震体系的简化力学模型。给出了结构与隔震层之间倾斜角、结构高宽比以及隔震层曲率半径之间的关系。推导理论公式并编制应用程序,选用Taft波、El Centro波、Tjew波进行数值模拟,分析了地震作用下曲面摩擦滑移隔震体系上单质点模型结构的高宽比对其加速度和位移响应的影响;分析得到上部结构水平动力响应主要受到曲率半径和摩擦系数影响;结构高宽比不影响合理曲率半径的选取,高宽比越大,最优倾斜角越小。通过分析地震作用下曲面摩擦滑移隔震体系的动力特性,给出了曲率半径的优选方法。The curved surface characteristics are used to improve the function of the limit and reset of the traditional friction-slip isolation layer,and a simplified mechanical model of the curved-surface friction-slip isolation system under unidirectional excitation is established.The relationship between the angle between the structure and the isolation layer,the aspect ratio of the structure and the radius of curvature of the isolation layer are given.The theoretical formula is deduced and the Matlab codes are developed.The Taft wave,El Centro wave and Tjew wave are used for numerical simulation.The aspect ratio of the single degree of freedom model of the structure on the curved-surface sliding isolation system under earthquake action is analyzed.The analysis shows that the horizontal dynamic response of the superstructure is mainly affected by the radius of curvature and the friction coefficient;the aspect ratio of the structure does not affect the selection of the optimal radius of curvature.The larger the aspect ratio,the smaller the optimal tilt angle.By analyzing the dynamic characteristics of the curved-surface sliding isolation system under earthquake action,the preferred method of curvature radius is given.

关 键 词：曲面滑移 隔震分析 高宽比 曲率半径 最优倾斜角 

分 类 号：TU352.1[建筑科学—结构工程]