Title of article
VariablefrictionpendulumsystemforseismicisolationofliquidstoragetanksOriginalResearchArticle
Author/Authors
V.R.Panchal، نويسنده , , R.S.Jangid، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2008
Pages
12
From page
1304
To page
1315
Abstract
Earthquakeresponseofliquidstoragesteeltanksisolatedwithvariablefrictionpendulumsystem(VFPS)isinvestigatedundernormalcomponentofsixrecordednear-faultgroundmotions.Thecontinuousliquidmassofthetankismodeledaslumpedmassesknownassloshingmass,impulsivemassandrigidmass.Thecorrespondingstiffnessconstantsassociatedwiththeselumpedmassesareworkedoutdependinguponthepropertiesofthetankwallandliquidmass.ThegoverningequationsofmotionofthetanksisolatedwithvariablefrictionpendulumsystemarederivedandsolvedbyNewmarkʹsstep-by-stepmethodassuminglinearvariationofaccelerationoversmalltimeinterval.InordertoverifytheeffectivenessoftheVFPSintanks,theseismicresponseoftanksisolatedwithVFPSiscomparedwiththatofthesametanksisolatedusingtheconventionalfrictionpendulumsystem(FPS).Furthermore,aparametricstudyisalsocarriedouttocriticallyexaminethebehaviouroftanksisolatedwithVFPS.Thevariousimportantparametersconsideredarethetankaspectratio,theisolationperiodandinitialtimeperiodoftheVFPS.Inaddition,theseismicresponseoftanksisolatedwithVFPSundertrigonometriccycloidalpulsesisalsoinvestigated.Fromtheseinvestigations,itisconcludedthatwiththeinstallationofVFPSintanks,theseismicresponseoftanksduringnear-faultgroundmotionscanbecontrolledwithinadesirablerange.Finally,itisalsoobservedthattheresponseoftanksisolatedwithVFPSunderthenear-faultgroundmotionsandtrigonometriccycloidalpulsesmatcheswellonlywhentheisolationperiodreacheshighvalues.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2008
Journal title
Nuclear Engineering and Design Eslah
Record number
895090
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