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基于性能的基础隔震结构地震易损性分析
Performance-based seismic vulnerability analysis of base isolation structures
投稿时间:2017-06-06  修订日期:2017-08-11
DOI:
中文关键词:  基础隔震结构  易损性分析  拟力法  动力非线性分析  隔震层塑性耗能
英文关键词:base isolation structure  vulnerability analysis  force analogy method  dynamic nonlinear analysis  plastic energy dissipation of isolation layers.
基金项目:国家重点研发计划;中央高校基本科研业务费资助
作者单位E-mail
曲激婷 大连理工大学 qjt@dlut.edu.cn 
房文琪 大连理工大学  
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中文摘要:
      对基础隔震结构进行基于性能的易损性分析。首先建立了基础隔震结构基于拟力法的能量方程,提出基于变形和隔震层塑性耗能的损伤指标,定义隔震结构的四个损伤性能状态;然后对隔震结构进行动力非线性分析,计算得到两种损伤指标的损伤值;最后对损伤值进行线性统计回归分析,推导出结构发生各级破坏的概率计算公式,从而分别得到隔震结构基于两种损伤指标的易损性曲线。研究表明,基于隔震层塑性耗能的损伤指标更能合理的反映该结构的损伤程度,为基于性能的隔震结构易损性分析提供了新的思路和方法。
英文摘要:
      The vulnerability analysis based on the performance of base isolation structures was performed. Firstly, the motion and energy equations of base isolation structures based on force analogy method were established, and damage indices based on deformation and plastic energy dissipation of isolation layers were put forward, and four damage performance status of isolation structures were defined. Then, the nonlinear dynamic analysis of an isolation structure was done, and damage values of the two kinds of damage indices were calculated. Finally, statistical regression analysis for the damage values was performed and the probability calculation formula for every damage states of structure were derived, thus structure vulnerability curve based on two kinds of damage indices were got respectively. Studies have shown that the damage index based on plastic energy dissipation of isolation layers could be more reasonable reaction of the structure damage degree for this example. A new idea and method for vulnerability analysis of isolation structures based on performance is provided.
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