【作者】 于晓辉； 周洲； 吕大刚；

【Author】 Yu Xiaohui;Zhou Zhou;Lu Dagang;Harbin Institute of Technology;Guilin University of Technology;Beijing Beijing University of Civil Engineering and Architecture;

【机构】 哈尔滨工业大学； 桂林理工大学； 北京建筑大学；

【摘要】 一次强震的发生通常伴随有多次余震的发生,合理评估工程结构在主余震序列作用下的易损性与风险已经成为目前地震工程领域研究的热点问题。传统基于标量式表达的地震易损性分析方法多仅考虑主震一次地震作用,无法考虑主余震序列多次地震作用。为解决这一问题,本文作者提出了基于向量式表达的结构主余震风险分析理论框架。本次报告将重点介绍这一理论框架的提出背景、主要思路及主要创新点,分别介绍了主余震序列作用下的结构向量式主余震危险性、易损性与风险分析的基本理论与分析步骤。同时,对本文相关作者在近年来结构主余震性能评估方面的相关研究进行简介。相关研究表明:向量式主余震危险性、易损性与风险分析可以同时反映主震和余震的影响,为进行结构在主余震序列作用下的风险分析提供了一个新的思路。更多还原

【Abstract】 A strong earthquake would commonly trigger multiple aftershocks.It has become the research hotspot to conduct fragility and risk assessment for structures under mainshock-aftershock sequences in a reasonable way.However,the conventional scalar-valued seismic fragility analysis method only consider single earthquake excitations without incorporating the effect of multiple earthquakes.To solve this problem,the authors propose a vector-valued seismic risk analysis framework for the structures under mainshock-aftershock sequences.This presentation would focus on the introduction of the backgrounds,methodologies and innovations of this framework.The basic methods and the analysis procedures of vector-valued mainshock-aftershock hazard,fragility and risk analysis are introduced.Moreover,a brief introduction is also given about the recent studies by the authors on the structural performance assessment of structures under mainshock-aftershock sequences.The results show that the vector-valued maishock-aftershock hazard,fragility,and risk assessment would reflect the effects from both mainshocks and aftershocks.The proposed framework provides another new way for the risk assessment of structures under mainshocks-aftershock sequences.更多还原