基于概率密度演化法的隔震结构随机地震响应与可靠度分析

顾镇媛1.2,王曙光2,杜东升2,刘伟庆2

振动与冲击 ›› 2018, Vol. 37 ›› Issue (15) : 97-103.

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (15) : 97-103.
论文

基于概率密度演化法的隔震结构随机地震响应与可靠度分析

  • 顾镇媛1.2,王曙光2,杜东升2,刘伟庆2
作者信息 +

Random seismic responses and reliability of isolated structures based on probability density evolution method

  • GU Zhenyuan1,2,WANG Shuguang2,DU Dongsheng2,LIU Weiqing2
Author information +
文章历史 +

摘要

采用简化的两质点隔震结构模型研究随机地震激励下结构设计参数随机性对结构位移响应与可靠度的影响。隔震层和上部结构分别采用Bouc-Wen 模型和刚度退化的 Bouc-Wen 模型来模拟,结合概率密度演化方法和基于极值分布的可靠度理论,求解不同场地条件、阻尼比、周期比与屈重比下隔震层与上部结构的层间位移响应信息与整体可靠度,并对设计参数进行优化。研究结果表明,概率密度演化方法能够有效评估隔震结构的抗震性能;通过对设计参数的适当取值,能使隔震层与上部结构位移响应均最小,从而提高隔震结构整体可靠度。

Abstract

An isolated structure was simplified as a two-mass dynamic model, and effects of its random structural parameters on its displacement response and reliability under stochastic earthquake excitations were investigated. Bouc-Wen model and the stiffness degenerated Bouc-Wen model were used to simulate its isolation layer and superstructure, respectively. Using the probability density evolution method and the reliability theory based on extreme value distribution, the inter-story displacement responses of the isolation layer and superstructure, and the reliability of the whole structure under different site conditions, damping ratios, period ratios and yield force ratios were solved. The design parameters were optimized. The results showed that the probability density evolution method can effectively evaluate the aseismic performance of the isolated structure; appropriately choosing design parameters can make displacement responses of both the isolation layer and the superstructure be the minimum to improve the reliability of the whole structure.



关键词

隔震结构 / 概率密度演化法 / 随机响应 / 参数优化 / 可靠度

Key words

 isolated structure / probability density evolution method / random response / parametric optimization / reliability

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顾镇媛1.2,王曙光2,杜东升2,刘伟庆2. 基于概率密度演化法的隔震结构随机地震响应与可靠度分析[J]. 振动与冲击, 2018, 37(15): 97-103
GU Zhenyuan1,2,WANG Shuguang2,DU Dongsheng2,LIU Weiqing2. Random seismic responses and reliability of isolated structures based on probability density evolution method[J]. Journal of Vibration and Shock, 2018, 37(15): 97-103

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