支座失效下基础隔震结构的损伤路径识别  

Damage path identification of base-seismo-isolated structures in case of isolating bearing failure

作　　者：杜永峰[1,2] 杨晨晓 黄小宁[2] DU Yong-feng;YANG Chen-xiao;HUANG Xiao-ning(Western Center of Disaster Mitigation in Civil Engineering,the Ministry of Education,Lanzhou Univ. of Tech.,Lanzhou 730050,China;Institute of Earthquake Protection and Disaster Mitigation,Lanzhou Univ. of Tech.,Lanzhou 730050,China)

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

出　　处：《兰州理工大学学报》2019年第1期112-119,共8页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(51578274);教育部长江学者创新团队项目(IRT13068)

摘　　要：为研究基础隔震结构的隔震支座意外失效后,剩余结构在三维地震动作用下构件的损伤指数和结构的损伤路径变化,利用三维整体结构弹塑性分析与抗震性能评估软件Perform-3D对隔震结构进行分析.通过对支座未失效和支座失效时的隔震结构的构件损伤进行损伤指标评价,比较构件损伤指标的大小以此来确定结构损伤路径的分布及变化规律.对一个6层的基础隔震结构进行分析,结果表明,角部隔震支座的失效会引起构件的损伤指标的剧烈变化,使得隔震结构支座失效位置上部构件的破坏路径成为主要的损伤路径.In order to investigate the variation of damage index and structural damage path of the components in remainder structure subjected to three-dimensional seismic action after unexpected failure of sesmo-isolating bearing of base-seismo-isolated structure,a software Perform-3D for elastoplasticity analysis and anti-seismic performance assessment was used to carry out the analysis of the seismo-isolated structure.By means of damage index assessment and magnitude comparison of the components in the seismo-isolated structure with and without bearing failure,the distribution and variation rule of damage path of the structure were determined.A six-story base-seismo-isolated structure was analyzed and its result shows that the failure of the corner seismo-isolating bearing will induce a severe change of the damage index of the components and make the damage path of the upper components over the bearing failure position in the seismo-isolated structure to become the main damage path.

关 键 词：基础隔震结构 支座失效 损伤指数 损伤路径 

分 类 号：TU312[建筑科学—结构工程] TU352