Time-variant fragility analysis of the bridge system considering time-varying dependence among typical component seismic demands

Time-variant fragility analysis of the bridge system considering time-varying dependence among typical component seismic demands

论文摘要

This paper presents a copula technique to develop time-variant seismic fragility curves for corroded bridges at the system level and considers the realistic time-varying dependence among component seismic demands. Based on material deterioration mechanisms and incremental dynamic analysis, the time-evolving seismic demands of components were obtained in the form of marginal probability distributions. The time-varying dependences among bridge components were then captured with the best fitting copula function, which was selected from the commonly used copula classes by the empirical distribution based analysis method. The system time-variant fragility curves at different damage states were developed and the effects of time-varying dependences among components on the bridge system fragility were investigated. The results indicate the time-varying dependence among components significantly affects the time-variant fragility of the bridge system. The copula technique captures the nonlinear dependence among component seismic demands accurately and easily by separating the marginal distributions and the dependence among them.

论文目录

文章来源

类型: 期刊论文

作者: Song Shuai,Qian Yongjiu,Liu Jing,Xie Xiaorui,Wu Gang

来源: Earthquake Engineering and Engineering Vibration 2019年02期

年度: 2019

分类: 基础科学,工程科技Ⅱ辑

专业: 公路与水路运输

单位: Department of Civil Engineering, Taiyuan University of Technology,Department of Bridge Engineering, Southwest Jiaotong University,Department of Environmental Science, Baylor University,Southwest Municipal Engineering Design and Research Institute of China,School of Civil Engineering and Architecture, East China Jiaotong University

基金: Natural Science Foundation of China under Grant No.51808376

分类号: U442.55

页码: 363-377

总页数: 15

文件大小: 2223K

下载量: 43

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Time-variant fragility analysis of the bridge system considering time-varying dependence among typical component seismic demands
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