Page 175 - 《水资源与水工程学报》2022年第4期
P. 175

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

            DOI:10.11705/j.issn.1672-643X.2022.04.23


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              Globalimportanceanalysisofinfluencingfactorsofdam structuralreliability

                                                                             3
                                                           1,2
                                           ZHANGJingmei ,WANGShaowei
              (1.StateKeyLaboratoryofHydrology-WaterResourcesandHydraulicEngineering,HohaiUniversity,Nanjing210098,China;
                 2.SchoolofWaterConservancyandEnvironmentEngineering,ZhejiangUniversityofWaterResourcesandElectricPower,
                                Hangzhou310018,China;3.SchoolofEnvironmentalandSafetyEngineering,
                                          ChangzhouUniversity,Changzhou213164,China)

                 Abstract:Sensitivitycoefficientsarecommonlyusedintheanalysisoftheinfluenceofvariousuncertain
                 factorsonthereliabilityofdamstructures;however,thevaluesofthesensitivitycoefficientsareselected
                 fromtherangeofthelocaldesigncheckingpoints.Inordertoovercomethedefectoflocality,theglobal
                 importanceanalysismethodofthefactorswhichcaninfluencethedamstructuralreliabilityisstudiedfor
                 theanalysis.Firstly ,onthebasisofthedamstructuralreliabilityanalysismodel,theglobalimportance
                 measurementindexofinfluencingfactorsaredeterminedconsideringthechangesofuncertainfactorsin
                 thewholefailuredomain.Then ,MonteCarlosimulationcombinedwithtruncatedimportancesampling
                 (TIS-MCS)isusedtoquantitativelycalculatetheglobalimportancemeasurementindex.Finally,the
                 structuralreliabilityanalysismodelofadamisestablishedtocalculateandcomparetheglobalimportance
                 measurementindexesandsensitivitycoefficientsoftheuncertainfactors.Theresultshowsthattheglobal
                 importancemeasurementindexcanreflecttheinfluenceofuncertainfactorsonthedamstructuralreliabil
                 itymorecomprehensivelythanthesensitivitycoefficient.
                 Keywords:damstructuralreliability;globalimportancemeasurementindex;sensitivitycoefficient;un
                 certainfactor ;truncatedimportancesampling(TIS);MonteCarlosimulation(MCS)

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