多维地震激励下串联隔震结构的倒塌模拟  

Collapse Simulation of the Serial Isolation Structure Subjected to Multi-dimensional Earthquake

作　　者：杜永峰[1,2] 王小虎[1] 

机构地区：[1]兰州理工大学防震减灾研究所,甘肃兰州730050 [2]西部土木工程防灾减灾教育部工程研究中心,甘肃兰州730050

出　　处：《工程抗震与加固改造》2012年第6期50-54,共5页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金(50978130)

摘　　要：近断层地震作用下,隔震结构会受到多维地震激励。本文运用基于MSC.MARC的钢筋混凝土弹塑性分析程序TUHFIBER,采用弹簧阻尼单元模拟隔震支座,建立了结构三维有限元模型。分别对水平单向、水平双向和三向地震作用下串联隔震结构的倒塌过程进行了模拟。通过改变结构各层的抗侧刚度,得到了串联隔震结构的3种倒塌模式。结果表明,多维地震作用下结构隔震层更容易发生位移超限破坏。Isolation structure will be subjected to multi-dimensional seismic excitation under near-fault earthquake.The elastic-plastic analysis program of reinforced concrete which named THUFIBER is employed.Spring-damper element is used to simulate isolation bearings.3D finite element model is set up by MARC.By inputing of one-dimensional,bi-dimensional and three-dimensional seismic waves,the collapse simulation of the serial isolation structure is analyzed in this paper respectively.By changing the lateral stiffness of the story,three series collapse modes of isolation structure are achieved.The result shows that when structure subjected to multi-dimensional earthquake,the isolation story may be destroyed at first.

关 键 词：多维地震 串联隔震 倒塌模拟 

分 类 号：TU352.12[建筑科学—结构工程]