Effectsofthreemainfactorsofblastingseismicwaves onelastic-plasticseismicresponseofmultistorymasonrybuildings
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摘要: 利用Matlab编写了一套Newmark时程分析法与刚度退化二线型恢复力模型相结合求解多层砌 体结构体系弹塑性地震响应的程序。以一个具体的4层砌体结构为分析对象,输入荷载用实测及人工模拟爆 破地震波作用的形式,并按某原则变换输入爆破地震波的特性参数,根据所求出的结构各弹塑性地震响应幅 值结果,分别讨论了爆破地震波幅值、主频和持续时间对多层砌体结构弹塑性地震响应幅值的具体影响,为建 立多参数爆破震动安全判据和爆区建筑物的爆破地震效应评估提供了理论和数值实验基础。Abstract: Asetofprogramsforsolvingelastic-plasticseismicresponseofmultistorymasonrybuildingswaswrittenbyMatlab, whichcombinedNewmarktime-historymethodwithtwo-linearmodelof stiffnessdegradation.Afour-storymasonrybuildingwastakenastheanalyzedobject,andtheactual andartificial-simulatedblastingseismicwaveswereusedastheinputloads,whosecharacteristicparametersweretransformedbasedonacertainprinciple. Accordingtocalculatedresultsofamplitude forallstructuralelastic-plasticseismicresponse,effectsofamplitude,dominantfrequencyanddurationofblastingseismicwavesonelastic- plasticseismicresponseofmultistorymasonrybuildingswere discussedrespectively.Thepresentstudywillprovidetheoreticalandnumericalexperimentfoundationforestablishingmulti- parametersafetycriterionofblastingvibrationandassessingblastingseismiceffectsofbuildingsinblastingzone.
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