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基于MIDASGen超长混凝土结构的温度应力分析.docx

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基于MIDASGen超长混凝土结构的温度应力分析 Abstract Theanalysisoftemperaturestressonultra-longconcretestructuresisanimportantfactorforensuringthesafetyandstabilityofthesestructures.Thispaperpresentsastudyonthetemperaturestressanalysisofultra-longconcretestructuresusingMIDASGen.ThepaperdiscusseshowthetheoryofthermalstressesisincorporatedintothefiniteelementanalysisofthesoftwarepackageMIDASGen.Thepaperalsopresentsanoverviewofultra-longconcretestructures,andhowthestructuralconfigurationsofthesestructurescanbemodeledusingMIDASGen.Thetemperaturestressanalysisisthencarriedoutforanultra-longconcretebridgeusingMIDASGen,andtheresultsarediscussedindetail.Thepaperconcludeswithasummaryofthefindingsandrecommendationsforfuturework. Introduction Ultra-longconcretestructures,suchasbridges,tunnels,andhigh-risebuildings,arebecomingmorecommonduetotheneedfortransportationinfrastructureandurbanization.Thesestructuresareexposedtovariousenvironmentalconditions,includingtemperaturechanges,whichcancausesignificantstressonthestructure.Theanalysisoftemperaturestressisnecessarytoensurethesafetyandstabilityofthestructurethroughoutitsdesignlife. Thetemperaturestressanalysisofultra-longconcretestructuresisacomplexprocessthatrequirestheuseofsophisticatedsoftwarepackagessuchasMIDASGen.Thesoftwareiscapableofconductingfiniteelementanalysisandsimulatingthebehaviorofconcretestructuresunderdifferentloadingconditions,includingthermalloads. Theobjectiveofthispaperistopresentadetailedanalysisofthetemperaturestressofultra-longconcretestructuresusingMIDASGen.Thepaperwilldiscussthetheoryofthermalstresses,themodelingofultra-longconcretestructures,andtheanalysisoftemperaturestressinaconcretebridge. Theoryofthermalstresses Theanalysisoftemperaturestressinconcretestructuresisbasedonthemechanicaltheoryofsolids.Whenatemperaturechangeoccurs,theconcretestructureundergoesadeformationinresponsetothechangeintemperature.Thisdeformation,calledthermalstrain,causesinternalstressesthatcanbecalculatedusingthecoefficientofthermalexpansion(CTE)o