Engineering Geology工程地质

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1、EngineeringGeology168(2014)120–128ContentslistsavailableatScienceDirectEngineeringGeologyjournalhomepage:www.elsevier.com/locate/enggeoSlopereliabilityanalysisconsideringspatiallyvariableshearstrengthparametersusinganon-intrusivestochasticfiniteelementmethodaa,⁎,Li-MinZhangbaShui-HuaJiang,Dian-Q

2、ingLi,Chuang-BingZhouaStateKeyLaboratoryofWaterResourcesandHydropowerEngineeringScience,KeyLaboratoryofRockMechanicsinHydraulicStructuralEngineering(MinistryofEducation),WuhanUniversity,8DonghuSouthRoad,Wuhan430072,PRChinabDepartmentofCivilandEnvironmentalEngineering,TheHongKongUniversityofScie

3、nceandTechnology,ClearWaterBay,Kowloon,HongKongarticleinfoabstractArticlehistory:Thispaperproposesanon-intrusivestochasticfiniteelementmethodforslopereliabilityanalysisconsideringReceived31July2013spatiallyvariableshearstrengthparameters.Thetwo-dimensionalspatialvariationintheshearstrengthparam-

4、Receivedinrevisedform31October2013etersismodeledbycross-correlatednon-Gaussianrandomfields,whicharediscretizedbytheKarhunen–LoèveAccepted10November2013expansion.Theprocedureforanon-intrusivestochasticfiniteelementmethodispresented.TwoillustrativeAvailableonline16November2013examplesareinvestigate

5、dtodemonstratethecapacityandvalidityoftheproposedmethod.Theproposednon-intrusivestochasticfiniteelementmethoddoesnotrequiretheusertomodifyexistingdeterministicfiniteKeywords:Slopeselementcodes,whichprovidesapracticaltoolforanalyzingslopereliabilityproblemsthatrequirecomplexfiniteShearstrengtheleme

6、ntanalysis.Itcanalsoproducesatisfactoryresultsforlowfailureriskcorrespondingtomostpracticalcases.SpatialvariabilityThenon-intrusivestochasticfiniteelementmethodcanefficientlyevaluatetheslopereliabilityconsideringRandomfieldspatiallyvariableshearstrengthparameters,whichismuchmoreefficientthantheLati

7、nhypercubesamplingReliability(LHS)method.IgnoringspatialvariabilityofshearstrengthparameterswillresultinunconservativeestimatesStochasticfiniteelementmethodoftheprobabilityofslopefailureifthecoefficientsofvariationoftheshearstrength