A phased approach to enable hybrid simulation of complex structures-中国期刊网

摘要 Hybridsimulationhasbeenshowntobeacost-effectiveapproachforassessingtheseismicperformanceofstructures.Inhybridsimulation,criticalpartsofastructurearephysicallytested,whiletheremainingportionsofthesystemareconcurrentlysimulatedcomputationally,typicallyusingafiniteelementmodel.Thiscombinationisrealizedthroughanumericaltime-integrationscheme,whichallowsforinvestigationoffullsystem-levelresponsesofastructureinacost-effectivemanner.However,conductinghybridsimulationofcomplexstructureswithinlarge-scaletestingfacilitiespresentssignificantchallenges.Forexample,thechosenmodelingschememaycreatenumericalinaccuraciesorevenresultinunstablesimulations;thedisplacementandforcecapacityoftheexperimentalsystemcanbeexceeded;andahybridtestmaybeterminatedduetopoorcommunicationbetweenmodules(e.g.,loadingcontrollers,dataacquisitionsystems,simulationcoordinator).Theseproblemscancausethesimulationtostopsuddenly,andinsomecasescanevenresultindamagetotheexperimentalspecimens;theendresultcanbefailureoftheentireexperiment.Thisstudyproposesaphasedapproachtohybridsimulationthatcanvalidateallofthehybridsimulationcomponentsandensuretheintegritylargescalehybridsimulation.Inthisapproach,aseriesofhybridsimulationsemployingnumericalcomponentsandsmall-scaleexperimentalcomponentsareexaminedtoestablishthispreparednessforthelarge-scaleexperiment.Thisvalidationprogramisincorporatedintoanexisting,maturehybridsimulationframework,whichiscurrentlyutilizedintheMulti-AxialFull-ScaleSub-StructuringTestingandSimulation(MUST-SIM)facilityoftheGeorgeE.BrownNetworkforEarthquakeEngineeringSimulation(NEES)equipmentsiteattheUniversityofIllinoisatUrbana-Champaign.Ahybridsimulationofafour-spancurvedbridgeispresentedasanexample,inwhichthreepiersareexperimentallycontrolledinatotalof18degreesoffreedom(DOFs).Thi

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A phased approach to enable hybrid simulation of complex structures

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A phased approach to enable hybrid simulation of complex structures

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