Page 168 - 《水资源与水工程学报》2022年第4期
P. 168

!33 " ! 4 #                       & ' ( ) & * + , -                               Vol.33No.4
               2022 $ 8 %               JournalofWaterResources&WaterEngineering                 Aug.,2022

            DOI:10.11705/j.issn.1672-643X.2022.04.22


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                        Applicationtechniquesofgrowingelementsinthesimulation
                                         calculationofRCCconstruction

                                                     PENGWenming
                 (Design&InvestigationCorporation,PowerChinaChengduEngineeringCorporationLimited,Chengdu610072,China)

                 Abstract:Inthesimulationanalysisofrollercompactedconcrete(RCC)thinlayerrollingconstruction,
                 laminatedelementscontainingmultilayermaterialsarecommonlyusedinordertoimprovethecalculation
                 efficiency ,amongwhichthegrowingelementisthetransitionform ofgraduallyforminglaminatedele
                 mentsonthepouringwarehousesurface.Becausethetemperatureandelasticmodulusofearlyconcrete
                 areverysensitivetoage,andtheperformanceofconcreteineachrollercompactedlayervariesgreatly,
                 theconventionalbilinearfunctionmethodispronetoerrorswhendescribingthegrowingelementinthefi
                 niteelementcalculation.Inviewofthis ,thepiecewiseshapefunctionmethodofgrowingelementispro
                 posedtosolvetheproblemoflowcalculationaccuracycausedbythelargepropertydifferenceofdifferent
                 layersofearlyconcrete.Inaddition ,inrespondtothechangeofpouringwarehousesurface,theshape
                 andparametersofthegrowingelementshouldbedynamicallyadjusted.Theproposedgrowthprocessing
                 techniquesincludethesearchandreplacementofheatdissipationboundary ,theinitialvalueresetofnew
                 layernodes ,theunitconnectionofnewandoldconcreteandsoon.Accordingtotheexampleanalysis,
                 itisverifiedthatthepiecewiseshapefunctionmethodcangreatlyimprovethecalculationaccuracyofthe
                 growingelement ,andthegrowthprocessingtechniquescanimprovetheapplicationrangeofthegrowing
                 element ,whichcanbeusedasareferenceforrelevantresearch.
                 Keywords:rollercompactedconcrete(RCC);simulationcalculation;growingelement;shapefunction;
                 finiteelementmethod
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