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页数:10页
时间:2019-05-25
《Seismic Analysis of Structures with Viscoelastic Dampers》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、SeismicAnalysisofStructureswithViscoelasticDampers12M.P.Singh,F.ASCE;andT.-S.ChangAbstract:Viscoelasticdampersarebeingusedinstructurestomitigatedynamiceffects.Themodelsofvaryingcomplexitiesfromsimplemaxwellelementtodifferentialmodelswithfractionalandcomplexorderderivativeshavebeenusedtorepresentthe
2、irfrequency-dependentforcedeformationcharacteristics.Morecomplexmodelsareabletocapturethefrequencydependenceofthematerialprop-ertiesbetter,butaredifÞculttouseinanalyses.However,theclassicalmodelsconsistingofassembliesofKelvinand/orMaxwellelementswithanadequatenumberofparameterscanbeformedtocapturet
3、hefrequencydependenceasaccuratelyasthemoresophis-ticatedfractionalderivativemodelscando.Themainadvantageinadoptingtheseclassicalmodelsisasimplerandsmallersystemofequations,whichcanbeconvenientlyanalyzedfornonlinearandlinearsystems.Inthisstudy,thetwoclassicalmechanicalmodelsconsistingofKelvinchainsa
4、ndMaxwellladderareused.Itisshownthatthesemechanicalmodelsareaseffectiveasthefractionalderivativemodelincapturingtheeffectofthefrequencydependenceofthematerialpropertiesinresponsecalculationsandaremoreconvenienttouseindynamicresponseanalyses.DOI:10.1061/ASCE0733-93992009135:6571CEDatabasesubje
5、ctheadings:Seismicanalysis;Viscoelasticity;Damping;Structuralcontrol.IntroductionZhangetal.1989;ZhangandSoong1982;ShenandSoong1995.AnotherapproachistouseanalyticalmodelsthathavetheViscoelasticdampersaresomeofthepreferredenergydissipationsamestorageandlossmoduliasintheexperimentaldata.Adevicesforpa
6、ssiveseismicresponsecontrolofstructures.WhensimpleMaxwellmodeloritsmodiÞcationshavebeenusedinstalledinastructure,theyprovideenergydissipationandstiff-Kirekawaetal.1992;Singhetal.2003,buttheydonothaveness,andbothofthesecharacteristicsarefrequencyandtempera-enoughparameterstoaccuratelycapturethefre
7、quencydepen-dence.Tocaptureitmoreaccurately,amoresophisticatedfrac-turedependent.ThesecharacteristicsarecommonlydeÞnedintionalderivativemodelhasbeenusedinseveralstudiesinvolvingtermsofexperimentallyobtained
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