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  杨贝贝,王志涛,张秀彦.基于IDA方法的框架结构震害风险评估[J].震灾防御技术,2020,15(1):21-32, DOI:10.11899/zzfy20200103.

基于IDA方法的框架结构震害风险评估
摘要:    为了评估不同抗震设防烈度区建筑结构震害风险,即场地地震危险性与结构地震易损性的卷积,本文以典型框架结构为例,对其震害风险进行研究。依据抗震设计规范,分别按照6度、7度和8度设计3个3跨10层框架结构模型,采用动力增量分析方法(Incremental Dynamic Analysis,IDA)对其进行地震易损性分析。同时,基于我国地震烈度概率分布特点,应用MATLAB软件生成符合极值III型分布的地震烈度,并将其转化为地震加速度峰值,联合地震易损性结果评估模型震害风险。通过划分震害风险等级,为建筑结构抗震防灾对策的制定提供借鉴。
作者单位
杨贝贝 北京工业大学, 建筑工程学院, 北京 100124
北京工业大学抗震减灾研究所, 北京 100124 
王志涛 北京工业大学, 建筑与城市规划学院, 北京 100124
北京工业大学抗震减灾研究所, 北京 100124 
张秀彦 北京财贸职业学院, 北京 101101 
关  键  词:框架结构  IDA地震易损性  地震危险性  震害风险
DOI:10.11899/zzfy20200103
基金项目:国家重点研发计划课题(2019YFC1520803)
收稿日期:2019-09-16
作者简介:杨贝贝,女,生于1995年。硕士研究生。主要从事城市与工程安全减灾等方面的研究。E-mail:1293854343@qq.com
通讯作者:王志涛,男,生于1980年。副教授,硕士生导师。主要从事城市与工程安全减灾等方面的研究。E-mail:ieewzt@163.com
Seismic Risk Assessment of Frame Structures Based on IDA Method
Abstract:      In order to evaluate the seismic risk of buildings in different seismic fortification intensities, that is, the convolution of site seismic hazard and structural seismic fragility, a typical frame structure was taken as an example in this paper. According to the aseismic design code, three three-span ten-story frame structure models were designed with seismic precautionary intensities of 6,7, and 8 respectively. Their seismic fragility was analyzed by Incremental Dynamic Analysis (IDA). Based on the probability distribution of seismic intensities in China, seismic intensities of the extreme value III distribution were generated by MATLAB software and were converted into peak ground acceleration. Combined with the seismic fragility results, the seismic risk of three models were evaluated and the seismic risk grades were divided. It provides reference for the formulation of building seismic resistance and hazardous prevention countermeasures.
Keywords:  Frame structure  Incremental Dynamic Analysis(IDA)  Seismic fragility  Seismic hazard  Seismic risk
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