大尺寸钢筋高强混凝土柱的轴心受压性能

43520133BuildingStructureVol．43No．5Mar．2013*10012440000kN。、、。。TU398.7A1002-848X201305-0077-05Mechanicalpropertiesoflarge-sizehigh-strengthreinforcedconcretecolumnsunderaxialcompressionFuJiaDuXiuliZhangJianweiKeyLaboratoryofUrbanSecurityandDisasterEngineeringofMinistryofEducationBeijingUniversityofTechnologyBeijing100124ChinaAbstractInordertorevealthesizeeffectlawandtheaxialcompressionperformanceoflarge-sizehigh-strengthreinforcedconcretecolumnsaxialcompressionexperimentsofhigh-strengthreinforcedconcretecolumnswithdifferentgeometricdimensionsandstirrupratiowerecarriedoutunder40000kNmulti-functionpress．Basedontheexperimentsthefailurecharacteristictheultimatebearingcapacityandthedeformationoflarge-sizehigh-strengthreinforcedconcretewithdifferentgeometricdimensionsandstirrupratiowereobtained．Theresultsshowthatastohigh-strengthreinforcedconcretecolumnswithstirrupsunderaxialloadingsizeeffectexistsinmaximumcarryingcapacityanddeformationcapacity．Stirrupratiohasvaryingdegreesofimpactonmaximumcarryingcapacityanddeformationcapacity．Keywordshigh-strengthreinforcedconcretecolumnstirrupratioaxialcompressionperformancesizeeffectmonotonicloadingtest*[e-mail]。0、。1-5。、。6-10300mm。10。11.121.5%0.65%1.20%4NMMS21。HPB235。NM800NM600NM400MS800MS600MS400HRB335NM200MS200HRB4002。1。C6525mm。865.8MPa45.5MPa2530με。1.220131/mm/%/mm/kN/kN/%/%NM800-14804×8050.654037881.828949.2－24－17.5NM800-24800×8000.654032241.428818.2－11NM600-13602×6020.663020229.316283.2－20－23.5NM600-23604×6030.663022409.016332.3－27NM400-12403×4030.65209038.57482.9－17－22.5NM400-22403×4030.652010335.27482.9－28NM200-11200×2000.66102178.81830.6－16－13.5NM200-21200×2000.66102061.21830.6－11MS800-14799×8031.204038966.828883.6－26－25.0MS800-24803×8061.204038391.529113.8－24MS600-13608×6031.203023819.416505.3－31－31.5MS600-23600×6001.203023988.916234.1－32MS400-12402×4001.202010947.77466.5－32－29.5MS400-22401×4011.202010270.57466.6－27MS200-11200×2001.20102359.11871.6－21－20.0MS200-21200×2001.20102305.21871.6－192/mm/MPa/MPa/με/%12HRB335475523239213.714HRB335376556190226.318HRB335346516170828.320HRB335358528185129.822HRB335383583198829.025HRB335345539176730.46HRB400523656261619.88HRB400557723291615.048433474206113.16HPB235541590257612.88HPB235454506216320.810HPB235454490216317.640000kN。2。。22.13。。、、。、、30°～40°。。MS800-1MS400-2NM800-2NM400-1NM400-2。0.65%1.2%。2.2-4。-。《》GB50010—2010111。87435．1297201331。400600mm800mm2。。2.3、85%/με3εpeakε0．851212NM-800－2208－1861－2035－2985－3742－3364NM-600－2384－2086－2235—－3048－3048NM-400－2805－2733－2769－5274－4087－4680NM-200－2867－3225－3046—－4408－4408MS-800－2666－2628－2647－3544－3403－3473MS-600－2961－2681－2821－4243－4234－4239MS-400－2825－3093－2959－3428－4759－4094MS-200－3699－3941－3820－5272－5980－56263。εpeakε0.8585%。32。585%62d。5。685%。2.47。2。7NMMS08435．4-5685%7。31。2。3。4。1MAIHOTRAVM．Are4×8inchconcretecylindersasgoodas6×12inchcylindersforqualitycontrolofconcreteJ．ACIStructuralJournal197673133-36．2SABINSGMMIRZASM．SizeeffectsinmodelconcreteJ．JournaloftheStructuralDivision197910561007-1020．3LESSARDMCHALLALOAITCINPC．TestinghighstrengthconcretecompressivestrengthJ．ACIMaterialsJournal1993904303-308．4．M．l994．5．D．2002．6BAZANTZPKWONYW．FailureofslenderandstockyreinforcedconcretecolumnstestsofsizeeffectJ．MaterialsandStructures19942716679-90．7MICHELEBBAZANTZP．Sizeeffectinconcretecolumnsfinite-elementanalysiswithmicroplanemodelJ．JournalofStructuralEngineering2001127121382-1390．8NEMECEKJBITTNARZ．Experimentalinvestigationandnumericalsimulationofpost-peakbehaviorandsizeeffectofreinforcedconcretecolumnsJ．MaterialsandStructures/MateriauxetConstructions200437267161-169．9SENESBARRBIGABUSIAFHF．SizeeffectinaxiallyloadedreinforcedconcretecolumnsJ．JournalofStructuralEngineering20041304662-670．10．J．201043S21-8．11GB50010—2010S．2011．18