实腹式型钢混凝土梁受扭性能试验研究

43820134BuildingStructureVol．43No．8Apr．2013*112211215011253000461。。。TU317+．2A1002-848X201308-0058-05ExperimentalstudyontorsionalbehaviorofsolidwebsteelreinforcedconcretebeamsShaoYongjian1YuWen1ChenZongping2YuXingguo2WengXiaohong11SuzhouUniversityofScienceandTechnologySuzhou215011China2GuangxiUniversityNanning530004ChinaAbstractInordertostudythetorsionalbehaviorofsteelreinforcedconcretebeamsexperimentswereconductedonsixsteelreinforcedconcretebeamswithdifferentparametersandonereinforcedconcretebeamsubjectedtopuretorsion．Testandanalysisresultsshowthatthecrackingtorqueisalmostthesameforsteelreinforcedconcretestructuresandreinforcedconcretestructureswithtorsion．Theinfluenceofsteelonthecrackingtorquecanbeneglected．Steelcangreatlyimprovetheultimatetorqueandtheductility．ThetorsionresistanceloadingofSRCstructurescanbeincreasedbydecreasingthestirrupspacingorincreasingsectionalsteelarearatio．Theformulaesaboutcrackingtorqueandultimatetorquewerepresented．Thepredictedresultsareingoodagreementwiththemeasuredones．Keywordssteelreinforcedconcretetorsionmembercrackingtorqueultimatetorque*51078249。[e-mail]。0、。12。、、、3-7。。61。。16SSRCB-1～SSRCB-61RCB-1。1412123。1/mm/mmρss/%ρs/%ρsv/%ξSSRCB-1I14250×4008@2002.150.4520.2011.555SSRCB-2I20a250×4008@2003.560.4520.2011.555SSRCB-3I14250×3408@2002.530.5320.2011.762SSRCB-4I10250×3008@2001.910.6030.2011.934SSRCB-5I20a250×4008@1003.560.4520.4020.778SSRCB-6I10250×3006@2001.910.6030.1132.990RCB-1－250×4008@20000.4520.2011.555ρssρsρsvξ。438．12fy/MPafu/MPaEs/×105MPaI10382.61452.171.937I10355.85428.471.906I14383.13477.942.016I14369.05449.401.945I20a351.56465.632.045I20a312.52398.101.9826391.96542.722.4758340.91482.952.45412300.62433.242.3573fc/MPafcu/MPaft/MPafv/MPaEc/MPa22.9630.202.522.712.99×104fcfcuftfvEc。。2。。。30%5mm。2～3min85%。1m、、、、、。22.11RC。21。145°420mm250mm。。3a。2SSRC。。。。。9520134345°4。。3b。3、、4。4Ttcr/kN·mTSSRC/kN·m/rad/m/mmSSRCB-121.59024.4800.0514885.4SSRCB-221.67230.3580.0970366.5SSRCB-317.59521.3350.0805794.8SSRCB-414.79016.8300.04052811.0SSRCB-521.67535.0200.1027053.9SSRCB-616.57517.5950.04052820.5RCB-121.675kN·m。2.22.2.1SSRCB-1SSRCB-3。4SSRCB-1SSRCB-322.71%14.74%。。。2.2.2SSRCB-2RCB-1I20a。4a-。RCB-121.675kN·mSSRCB-221.672kN·m。。SSRCB-2RCB-1。RCB-1SSRCB-248.8%。SSRCB-2RCB-1。SSRCB-1SSRCB-2。4b-22.6%。。。。42.2.3SSRCB-2SSRCB-5。5SSRCB-2SSRCB-506438．16.7%。SSRCB-5SSRCB-2SSRCB-5SSRCB-2。。SSRCB-5。SSRCB-5SSRCB-2。SSRCB-2SSRCB-52.5mm2mm6.5mm3.9mm。533.1、。。《》GB50010—20108Tcr=0.85ftWt1WtWt=b2/63h－bbhft。5。0.9620.042。SSRCB-60.875。5Ttcr/kN·mTcr/kN·mTcr/TtcrSSRCB-121.59021.1970.982SSRCB-221.67221.1970.978SSRCB-317.59517.1810.976SSRCB-414.79014.5030.981SSRCB-521.67521.1970.978SSRCB-616.57514.5030.8753.2。。。6。6TJRC/kN·mTJS/kN·mTJRC+TJS/kN·mTSSRC/kN·mTSSRCTJRC+TJSSSRCB-114.1733.58117.75424.4801.379SSRCB-214.1736.50620.67930.3581.468SSRCB-311.8173.58115.39821.3351.386SSRCB-410.2042.72112.92516.8301.302SSRCB-516.4286.50622.93435.0201.527SSRCB-69.6152.72112.33617.5951.426TJRCTJSTSSRC。640%。。Tu=γ1ftWt+1．2槡ξfyvAst1Acor/s+γ2τybt21－t3()b+hwt2w2+t3w6－tt2[]w2162013γ1Ast1Acorξξ=AstlfyAcorAst1fyvucorfyvAstlsγ2τybthwhtw。γ1γ2、。γ10.37γ22.592γ1=0.37、γ2=2.597。761.0000.080。2。7TRC/kN·mTS/kN·mTRC+TS/kN·mTSSRC/kN·mTRC+TSTSSRCSSRCB-114.6729.27523.94724.4800.978SSRCB-214.67216.85031.52230.3581.038SSRCB-312.2219.27521.49621.3351.008SSRCB-410.5467.04717.59316.8301.045SSRCB-516.92616.85133.77735.0200.965SSRCB-69.9577.04717.00417.5950.96641。。31。2、。、、。31。4。2。1．M．2005．2．J．200430438-39．3．-J．20083831-4．4．J．201031815-21．5．D．2009．6KANGTHKKIMWKWAKYK．Sheartestingofsteelfiber-reinforcedlightweightconcretebeamswithoutwebreinforcementJ．ACIStructuralJournal20111085553-561．7GANDANGUOLANHUILIUJIEPENGetal．Seismicbehaviorandmomentstrengthoftubedsteelreinforced-concreteSRCbeam-columnsJ．JournalofConstructionalSteelResearch201167101516-1524．8GB50010—2010S．2011．13”“”C。2。3。1JGJ3—2010S．2011．2GB50011—2010S．2010．3R．2012．4R．2012．26