基于MVFOSM有限元可靠度方法的结构整体概率抗震能力分析被引量：12

Global probabilistic seismic capacity analysis of structures based on MVFOSM finite element reliability method

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摘要结构整体概率抗震能力分析既属于结构体系抗力统计分析研究内容,也属于地震易损性分析研究范畴,多采用数值模拟方法。作为一种不确定性传递的近似解析分析工具,平均值一次二阶矩方法(MVFOSM)广泛地应用于结构构件抗力的统计分析,但是很难应用于结构整体抗力的统计分析,主要困难在于结构反应是基本随机变量的隐式函数,梯度信息很难得到。将结构体系抗力的统计分析和地震易损性分析结合起来,通过基于MVFOSM的有限元可靠度方法,以新一代的地震工程模拟仿真软件OpenSees为计算平台,以最大层间位移角作为结构整体抗震能力参数,对钢筋混凝土框架结构的整体概率抗震能力进行分析,并用Monte Carlo模拟法结果进行验证,从而建立了钢筋混凝土框架结构的整体概率抗震能力模型。算例分析表明,MVFOSM有限元可靠度方法的精度和效率都很高,只需要进行一次有限元分析即可较为准确地获得结构整体概率抗震能力的前二阶矩信息。 The analysis of global seismic capacity of structures belongs to the category of resistance analysis of structural systems,meanwhile,it is also a kind of seismic fragility analysis of the structures in nature,in which numerical simulation methods are generally applied.As an approximate probability analysis method and an efficient uncertainty propagation tool,mean value first order second moment(MVFOSM) has been successfully applied in statistical analysis of structural member resistance,however,it is diffic...

作者吕大刚于晓辉王光远

机构地区哈尔滨工业大学土木工程学院

出处《世界地震工程》 CSCD 北大核心 2008年第2期1-8,共8页 World Earthquake Engineering

基金国家自然科学基金重大研究计划项目(90715021) 国家自然科学基金项目(50678057,50108005) 地震行业科研专项基金项目(2008419073) 教育部留学回国人员科研启动基金项目黑龙江省留学归国人员基金项目(LC05C01) 哈尔滨工业大学优秀青年教师基金项目

关键词 MVFOSM 有限元可靠度方法有限元反应灵敏度整体能力概率抗震能力 OPENSEES MVFOSM finite element reliability method finite element response sensitivity global capacity probabilistic seismic capacity OpenSees

分类号 TU311.3 [建筑科学—结构工程]

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参考文献22

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