〒305-0006 茨城県つくば市天王台3-1 Tel 029-851-1611 Fax 029-851-1622試験体まるごと解析による地震応答予測地震減災実験研究部門 PAL Mahendra Kumar2020.2.13 令和元年度 成果発表会2019.○○.○○○○○○○○○○○○○■Detailed finite element analysis model using solid element■Capable of reproducing global as well as local failure mechanism■Verification and validation using E-Defense shake table test dataForcomprehensiveunderstandingofseismicbehaviorofbuildingsandcivilstructuresagainststrongearthquake,numericalsimulationincorporatingbothmaterialandgeometricalnon-linearitiesismostsuitabletool.Thehigh-precisionniteelementmodelusingHigh-PerformanceComputing(HPC)arecapableofsimulatinglocalandglobalfailure/collapsebehaviorofbuildings.MaterialmodelssuchasextendedDrucker-Pragerforconcrete,semi-implicitmodelwithpiece-wiselinearhardeningruleforsteeland,ExponentialContractancymodelwithsub-loadingsurfaceforsoilhavealreadybeendevelopedinthisprojectwithanaimtoincorporatecomplexandcyclicbehaviorofconstructionmaterials.Analysisresultsoflarge-scalesoil-undergroundstructurespecimentestedatE-Defenseshakingtable,fromparameteridenticationtofull-scalesimulationareshowningure.Seismicresilienceofbuildingandcivilstructuresismainlycontrolledbyamountoflocaldamagesoccurredtothecomponentsofstructureandaccuracyoflocaldamagedependsuponthehowaccuratelythecyclicbehaviorandstinessdegradationcausedbythegrowthofmicro-defectsofconstructionmaterialhavebeenincorporated.Identicationofmaterialparametersandcalibrationoffailureparametersisaccomplishedbycomparingtheresultsofone-diceelementresultswithexperimentalresults.Forthevalidationofsimulationresults,testdataoffull-scaletestspecimenperformedatE-DefenseandTsukubaShakingTablearecomparedwithnumericalresults.QuantitativeseismicresilienceperformanceassessmentanddamagepredictionofstructurescanbefurtheradvancedbyimprovingthefunctionalityofE-Simulator.Therefore,developmentofvariousvarietyofconstitutivemodelsforconcrete,steel,soilandotherconstructionmaterialsusingnewmethodologiesnamelyphaseeldapproachandadvancedcomputeralgorithmisnextobviousstep.Volumetric strain in soil Von-mises stress in structural componentsDeviatoric stress vs Axial strain of soilAcceleration time history result02004006008001000120014001600051015Deviatoric stress [kPa]Axial strain [%]ExperimentSimulationMPaSoil-Structure Interaction simulation of large-scale soil-underground structure specimen6 m
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