近断层激励下子结构组合隔震的巨-子结构试验

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1、近断层激励下子结构组合隔震的巨-子结构试验颜学渊毛会敏吴应雄祁皓徐小勇福州大学土木工程学院福建工程学院生态环境与城市建设学院摘要：为解决受限于隔震支座的抗拉能力和结构高宽比限值、隔震技术很少应用在超高层建筑的问题，在新型巨-子结构体系的子结构底部设置由铅芯橡胶隔震支座和弹性滑移支座组成的组合隔震层，设计制作了一个有3个巨型结构层的巨-子结构模型，对其进行/近断层地震动及远场地震动作用下的振动台试验，研究丫组合隔震层对主结构和子结构振动的减震效果和近场地震对其影响.研宂结果表明，子结构底部设置组合隔震层，对主结构来说相当于调谐质量阻尼器，其对主结构

2、的地震响应只有较好的调谐减震作用;对子结构来说相当于基底隔震，其对子结构的地震响应具有显著的隔震效果.由于脉冲效应，近断层地震动作用下主结构和子结构的地震响应都要大于相同场地的远场地震动.关键词：巨-子结构;组合隔震;近断层地震动;振动台试验;振动控制;作者简介：颜学渊（1982-）,男，福建永春人，福州大学副教授，傅士，E-mail:yxy820910@sina.com收稿曰期:2016-11-17基金：W家自然科学基金资助项目（51578160）ExperimentalStudyonMega-subStructureswithCombined

3、IsolationunderNear-faultGroundMotionYANXueyuanMAOHuiminWUYingxiongQIAiXUXiaoyongCollegeofCivilEngineering，FuzhouUniversity;CollegeofEcologicalEnvironmentandUrbanConstruction，FujianUniversityofTechnology;Abstract：Tosolvetheproblemofseldomuseofisolationtechnologyinsuperhigh-ris

4、ebuildingsaswellastherestrictiononthetensilecapacityofisolationbearingandstructuralheight-widthratiolimitation，inthispaper,thecombinedisolationlayersconsistingofleadrubberbearingsandelasticslidingbearingsweresetatthebottomofthesub-structuresinthenewmega-substructuresystem.Ane

5、xperimentalmodelofmega-substructurewasdesignedandmanufactured,whichincludedthreemegafloors.Shakingtabletestsoftheuncontrolledandcontrolledmega-substructureundernear-faultandfar-faultgroundmotionswerecarriedout.Vibrationcontroleffectsofcombinedisolationlayersontheseismicvibrat

6、ionsofmain-structureandsub-structuresandtheinfluencesofnear-faultgroundmotionswerestudied.Theresultsshowthatthecombinedisolationlayeratthebottomofsub-structureisequivalenttoatunedmassdamperforthemain-structure,andithasobviousclampingeffectofTMDontheseismicreactionsofmainstruc

7、ture,whileitisequaltoabaseisolationstructureforthesub-structureitself,andithassignificantisolationeffectontheseismicresponsesofsub-structure.Seismicreactionsofthemain-structureandthesubstructuresundernear-faultgroundmotionsarclargerthanthatunderfar-faultgroundmotionsduetothep

8、ulseeffect.Keyword：mega-substructure;combinedisolation;near-faultgro