Page 163 - 《水资源与水工程学报》2023年第1期
P. 163

!34 " ! 1 #                       & ' ( ) & * + , -                               Vol.34No.1
               2023 $ 2 %               JournalofWaterResources&WaterEngineering                 Feb.,2023

            DOI:10.11705/j.issn.1672-643X.2023.01.19


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                 FGHIJ:TV33   KLMNO:A    KPQJ:1672643X(2023)01015909
                        Structuralperformanceanalysisofreinforcedconcretecrane
                                     beam withirregularcrossscalecracks


                                          1,2
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                                                          1
                                 JIAChao ,WANGYixin,MINQiaoling,LIMingchao
                  (1.StateKeyLaboratoryofHydraulicEngineeringSimulationandSafety,TianjinUniversity,Tianjin300350,China;
                                2.YellowRiverEngineeringConsultingCo.,Ltd.,Zhengzhou450003,China)
                 Abstract:Asanecessarystructurefortheconstructionofhydropowerstations,thecranebeamofrein
                 forcedconcretepowerhouseiswidelyusedinthedamengineering.However ,theenvironmentalcondi
                 tionsoflowtemperature,highwindspeedandlowhumidityinthealpineregionseasilyleadtoirregular
                 surfacecracksinthereinforcedconcretecranebeamduringconstruction ,whichseriouslyaffectsthesafe
                 serviceoftheconcretestructure.Thescaleofirregularcracksismuchsmallerthanthestructuralscaleof
                 reinforcedconcretecranebeams ,whichmakesitdifficultfortheexistingcalculationmethodstoeffective
                 lyconsidertheirregularityandmorphologicalauthenticityofthecracks.Tosolvethisproblem,ahighly
                 detailedsimulationmethodforirregularcrossscalecracksbasedonrealcrackpointcloudisproposed.In
                 thismethod ,thecracksurfaceisrepresentedbypointcloudsandembeddedtothefiniteelementmesheof
                 thestructure.Theelementnodeswherethecrackpassesthrougharethenprojectedtothecracksurface
                 inbatchestocapturethecrackanditspropagationpath.Themainadvantageoftheproposedmethodis
                 thatitdoesnotneedtochangetheinitialelementtypesandmeshthegeometricmodelwithcracks ,which
                 canreducethedifficultyofmeshingforcomplex3Dmodelsandismoreapplicablethanconventionalgeo
                 metricsubdivisionmethod.Moreover ,theconcretethreepointbendingbeamandwedgesplittingexperi
                 mentsareconductedtoverifythisproposedmethod.Thenthismethodisappliedtothestructuralsafetya
                 nalysisofareinforcedconcretecranebeaminthealpineregionofChina,whichcanprovideatechnical

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