Page 152 - 《水资源与水工程学报》2022年第5期
P. 152

! 33 " ! 5 #                      & ' ( ) & * + , -                               Vol.33No.5
               2022 $ 10 %              JournalofWaterResources&WaterEngineering                 Oct.,2022

            DOI:10.11705/j.issn.1672-643X.2022.05.18


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                 HIJKL:TV312   MNOPQ:A    MRSL:1672643X(2022)05014806
                 Reliabilityanalysisofantislidingstabilityofgravitydamsunderdouble
                       random situationofseismicmotionandstructuralparameters


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                           LIShiqiang,SONGZhiqiang,YAOQianru,LIUChen,LIUYunhe
                  (1.StateKeyLaboratoryofEcohydraulicsinNorthwestAridRegionofChina,Xi’anUniversityofTechnology,Xi’an
                     710048,China;2.ChinaRailwayFirstSurveyandDesignInstituteGroupCo.,Ltd.,Xi’an710043,China)
                 Abstract:Boththerandomnessoftheseismicmotionandthedamstructuralparametershaveanimpor
                 tantimpactonthestabilityandreliabilityofgravitydams.Inthispaper ,theantislidingstabilitylimit
                 stateequationoftheconstructionfoundationsurfaceofgravitydamwasestablished ,withthemaximum
                 valuesofthehorizontalandverticalinertialforceofthedambodyinthestochasticprocessastherandom
                 variables.Bythedeterminationofthemeanandvarianceoftherandomvariablesaccordingtotheparam
                 etersofthestochasticprocess ,thedualrandomnessproblemsofseismicloadandstructuralparameters
                 weremergedintoonerandomvariablemode.Then,theJCmethodwasusedtoanalyzethereliabilityof
                 theantislidingstabilityofthefoundationsurfaceofagravitydaminanactualproject ,andthefailure
                 probabilityoftheantislidingstabilityofthegravitydamwasanalyzedbasedontheprobabilityofearth
                 quakeoccurrence.Finally ,thesensitivityofrandomparametersofeachstructuretoreliabilityandfailure
                 probabilitywasanalyzedbyorthogonaltestmethod.Theresultsshowthattheproposedmethodwiththe
                 maximumvalueofthestochasticprocessastherandomvariablecanbeusedfortheanalysisoftherelia
                 bilityoftheantislidingstabilityofgravitydamsunderthedoublerandomsituationofseismicmotionand
                 structuralparameters.Thereliableindexofantislidingstabilityalongthefoundationsurfaceofthiscon
                 cretegravitydamwas4.23 ,thefailureprobabilitywas0.00117%.Thefrictioncoefficientofthefoun

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