低温建筑技术-结构工程Jun.2023No.300DOI:10.13905/j.cnki.dwjz.2023.6.004场地条件对层间隔震体系失效概率影响分析FAILUREPROBABILITYOFINTER-STORYISOLATIONUNDERDIFFERENTSITECONDITIONS刘小换1,余尚2(1.广州科技职业技术大学建筑工程学院,广州510550;2.广东省建筑设计研究院有限公司,广州510010)LIUXiaohuan1,YUshang2(1.SchoolofArchitectureandEngineering,GuangzhouVocationalUniversityofScienceandTechnology,Guangzhou510550,China;2.GuangdongArchitecturalDesign&ResearchInstituteCo.,Ltd.,Guangzhou510010,China)【摘要】地震波产生后经过建筑物地面场地土的过滤然后作用于建筑物,不同场地条件下场地土的过滤器特征参数不同,引起结构的地震响应大小也有所差别,为研究层间隔震体系在不同场地条件下的失效概率,文中以1栋8度设防烈度区的框剪层间隔震结构为例,基于随机振动理论和虚拟激励法,分析不同场地条件下层间隔震结构的随机地震响应和失效概率。结果表明在1层柱顶设置隔震支座后,结构的自振周期明显延长,场地土条件越好,隔震效果越好,对上部结构的减震效果也越好,结构失效概率越低。【关键词】层间隔震;场地条件;虚拟激励法;随机地震响应;失效概率【中图分类号】TU352.1【文献标志码】A【文章编号】1001-6864(2023)6-0016-04Abstract:Seismicwavesactonthebuildingsafterfilteringbythegroundsoilofthebuilding.Thecharacteristicpa⁃rametersofthesoilfiltervarywithsiteconditions,whichleadstodifferentresponseofthestructureintheseismic.Aframeshearinterlayerisolationstructureinan8-degreeseismicintensityzoneistakentostudythefailureprobabili⁃tyofinterlayerisolationsystemsunderdifferentsiteconditions.Withrandomvibrationtheoryandvirtualexcitationmethod,therandomseismicresponseandfailureprobabilityofisolationstructuresbetweenlowerlayersunderdiffer⁃entsiteconditionsarestudied.Theresultsshowthatthenaturalvibrationperiodofthestructureissignificantlypro⁃longedafterinstallingisolationbearingsonthetopofacolumnonthefirstfloor.Thebettersoilconditionsonthesite,thebetterisolationeffectivenessis,whichlowersthefailureprobabilityofstructural.Keywords:inter-storyisolation;sitecategory;pseudoexcitationmethod;randomseismicresponse;failureprobab...