同时考虑材料参数与地震动激励随机性的钢筋混凝土结构非线性随机动力响应分析

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关键词：钢筋混凝土结构;非线性随机动力响应分析;随机损伤;物理随机地震动模型;概率密度演化方法 中图分类号：TU528.01 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202312069

Nonlinear stochastic dynamic response analysis of RC structure with uncertain parameters under stochastic ground motion

CHENXin¹，LIJie1² （1.College of Civil Engineering，Tongji University，Shanghai 20oo92，China； 2.StateKeyLaboratory forDisasterReduction inCivilEngineering，Tongji University，Shanghai292，China）

Abstract：Asultisepositeaterialdomsoearityareteaycanicalavsofoeteately evaluatetepefoacsoffordoete（Cstrcresuderstroartqakestoiarhsticaicspoealis fRCstructustalver，sicacalisoCcusiddsofsoffrdsal methodologiesforohasticbration（uchasthpsedoexcitationmetodtepathintegraltiqueandthequvalentlinarati method，etal）egingurtoeonteCaliulatioisitedyegeoputatioalbdensedoebove backgrouds，eintmethdforteiearstoastcdaicesposaalsisofCcturesisproosdapWihinthe frameworkoftochasticdmagmechanicsthetwocaleandomfieldmodelisdoptedtodscribethecouplingeffectofspatialvtioand nonlinearityofconceteTerandomessofarthquakegoundmotioisepresentedbythephysicalbasedstochasticgroudmotioodel Theprobabilitydensityevolutionmetodiseploedtotain teprobabilitydistibutionofdnamicresponsesofRCstructure.Auical examplethatdalswitholinearstohasticdyaicresposaalysisofaRCfraestructesinvestigatedtodemonsratethcacyof theproposedmetodTheresultsidicatethat thespatialvaritionofconcretehasasignificantinfluenceonthedynamicresponsesofRC structures.

Keywords：reifoedoncetetructure;oearsochsticdyamicesposeaalysis;hasticamage;yicabasedtohasticroud motionmodel; probabilitydensity evolutionmethod

作为一种由水泥，砂浆及粗、细骨料组成的多相复合材料，混凝土内部存在随机分布的微孔洞、微裂纹等初始缺陷。（剩余16661字）