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                           Experimentalstudyonmechanism offaceslabextrudingrupturealong
                                     theslopedirectionofconcretefacedrockfilldams

                                                          1,2,3
                                                                    4
                                           1,2,3
                                                                                 1,2,3
                                     XUYao    ,HAOJutao      ,LUXi,WANGLina
                       (1.DepartmentofMaterials,ChinaInstituteofWaterResourcesandHydropowerResearch,Beijing 100038,China;
                            2.KeyLaboratoryofEngineeringMaterialsofMinistryofWaterResources,Beijing 100038,China;
                                         3.BeijingIWHR - KHLCo.,Ltd.,Beijing 100038,China;
                                 4.PowerchinaNorthwestEngineeringCorporationLimited,Xi’an 710065,China)

                  Abstract:Inthispaper,anexperimentalstudyiscarriedoutonthesteelbarbendingbulgeproblem oftheface
                  slabextrudingrupturealongtheslopedirectionofconcretefacedrockfilldams.Thecompressiontestoftheconcrete
                  columnwithasingleverticalbarisusedtosimulatetheextrudingrupturealongtheslopedirection.Thetestresults
                  confirmthatthecompressivestrengthofnon - stirrupreinforcedconcretecolumnswaslowerthanthatofplaincon
                  cretecolumnsinpreviousstudies,andthesmallerthethicknessofreinforcementcover,thelowerthestrength.
                  Comparedwithplainconcretecolumns ,thestrengthofreinforcedconcretecolumnswith5cmprotectivelayerde
                  creasesbyabout10%.Accordingtothefailureloadresultsofthetest,thelateralsupportstiffnesskofthecolumn
                  isinverselydeducedthroughtheexistingtheoreticalsolution.Forcolumnswith5cmand8cmcoverthickness ,the
                                     - 2
                                                    - 2
                  kvaluesare0.841N·mm and1.032N·mm respectively.Aftertheanalysisoftestresults,itisfoundthateach
                  sectionofreinforcedconcretecolumndoesnotconformthestrainplaneassumption ,thereinforcementdoesnotde
                  forminharmonywiththeconcreteincompression.Thereisastronginteractionbetweensteelandconcrete.There
                  sultsofthisstudyagainshowthatlimitingthelateraldeformationofthereinforcementisthefundamentalmeasureto
                  preventtheextrudingruptureofthepanelalongtheslopedirection.Inordertoprovideabasisforthequantitative
                  designofsuchmeasures ,thenumericalsimulationofthefaceslabextrudingrupturecausedbythesteelbarben
                  dingbulgeshouldbecarriedout.
                  Keywords:concrete faced rockfilldams; face slab extruding rupture; reinforcementbuckling instability;
                  modeltest


                                                                                    (责任编辑:李福田)


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