层间隔震结构地震易损性分析研究.doc


层间隔震结构地震易损性分析研究#
谭平1,张尚荣2,杜永峰2,周福霖1*
(1. 广州大学工程抗震研究中心;
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2. 兰州理工大学防震减灾研究所)
摘要:提出一种关于层间隔震结构地震易损性分析方法。定义了层间隔震结构的四个极限状
态,提出基于层间隔震结构极限破坏状态确定结构抗震性能水平限值的方法。该方法既考虑
了地震动输入的不确定性,又考虑了结构物理本身的不确定性。以中心复合法建立地震动-
层间隔震结构样本,对系统样本模型进行非线性动力时程分析,分别建立层间隔震结构各子
结构的响应面模型,在此基础上采用蒙特卡洛模拟获得易损性曲线。分析结果表明,本文提
出的方法计算量少、精度高,有效提高了易损性分析作为层间隔震结构性能评估的时效性,
具有较大的工程应用前景。
关键词:层间隔震结构;易损性分析;蒙特卡洛模拟;中心复合法
中图分类号:
Seismic fragility analysis of Inter-story isolation structures
TAN Ping1, ZHANG Shangrong2, DU Yongfeng2, ZHOU Fulin1
(1. Earthquake Engineering Research and Test Center of Guangzhou University, Guangzhou
510405, China;
2. Institute of Earthquake Protection and Disaster Mitigation, Lanzhou University of Technology,
Lanzhou 730050, China)
Abstract: A fragility analysis method of inter-story isolation structures was proposed. Four
ultimate damage states for inter-story structures are defined, and a method for solving the limit
values of the four performance levels is put forward. Considering the uncertainties of near-fault
and far-fault ground motions characteristics, Considering the uncertainties of ground motions
characteristics and structures parameters. Using posite design method to construct a
series of samples for various ground motions and inter-story isolation structures, nonlinear
dynamic time analysis of the sample model was carried out, and