型钢混凝土T形柱受剪性能及承载力计算

43120131BuildingStructureVol．43No．1Jan．2013T*530004SRCT4、、、4。-、-。T、、、。TTU398A1002-848X201301-0054-05ResearchonshearperformanceandbearingcapacitycalculationmethodofT-shapedsteelreinforcedconcretecolumnsZhangXianggangChenZongpingZhengShufangSuYishengLiangRongyaoCollegeofCivilEngineeringandArchitectureGuangxiUniversityNanning530004ChinaAbstractInordertostudytheshearbearingcapacityofinclinedsectioninT-shapedsteelreinforcedconcreteSRCcolumns4specimenswithdifferentshearspanratiosaxialcompressionratiossteelformandflangedimensionweredesignedandproducedtocarryoutmonotonicstaticshearloadingtest．Thewholeloadingprocessandfailurepatternwerewatchedandthecurvesofconcretestraindistributionalongcrosssectionheightload-strainandload-deflectionweredrawnbasedonthemeasureddata．Theimpactofparametersontheshearcapacitywasanalyzedandtheformulaforcalculatingcapacitywasproposed．ItisshownthataveragestrainofT-shapedsectionconformstoplanesectionassumption．Shearspanratiosaxialcompressionratiossteelformandflangedimensionhavesignificanteffectontheshearstrength．Thecalculationformulaofshearstrengthcanbeusedtocalculateultimatebearingcapacityofinclinedsection．KeywordssteelreinforcedconcreteT-shapedcolumnshearperformancestrengthcalculation*509080570832004。[e-mail]。0SRCL、T、1。SRC。LT23。SRC。SRC、、4-6SRC。4SRCSRC。11.14T、、、4C352300mm1。n=N/fcAc+fsAssNfcAcfsAss。λ=a/h0ah0。1T2。1.2、、2。431．T1nλTPcr/kNPu/kNT10.121.60I14126@200L25×3165240T20.232.18I14126@200L25×3150285T30.231.60I14126@200L25×3190420T40.231.60I14128@100—24037012T34、、2fy/MPafu/MPaEs/×105MPaI14299.64394.591.84I14268.40369.801.69L25×3272.20316.001.9612382.00595.002.078355.00482.002.376343.00468.002.43fcu38.76MPa。1.334。1500kN。22.1T1～T4。52.15%PuPu40°～45°1～2。。1/4～1/2。77.8%Pu。T。。Pu、0.45mm。T1～T45。2.2T4T5520135T1～T41、、243451～2。2.36～91-1、2-24。T。。2.4、/-10T。、。。/6T1/、、//。10//。/。。--。2.5-11T1～T44。1Pcr-2-365431．T7T28T39T410、/11-Pu。421.3mm。11T3T4T1T2/、T1～T4T3T4T3T4。33.1。。T2T32.181.60285420kNT3T247.4%。3.2T。TTTT。78T3。3T1～T4Pu/ftbch06.02T1'～T4'Pu/ftbch03.56。3.3752013。1T3T46@2008@100T3190240kNT4T326.3%。T3λn/Pu/ftbch0T11.600.12I14L25×35.44T22.180.23I14L25×36.04T31.600.23I14L25×36.53T41.600.23I148@1006.06T1'2.000.00I10L25×33.71T2'1.800.00I14L25×34.08T3'1.200.00I10L25×33.14T4'1.500.00I10L25×33.31T。1T4T3L25×3370420kNT3T413.5%。3.41T2hf/h=4∶3T1T3T4hf/h=1∶1T1T3T4T2。T。4SRC1、、。。、T。TVuVsVrcV=Vs+Vrc1VsTVs=fsAcosθ+Ahsfsh02fsAθAhsh0h0=h－αsαs。Vrc《》JGJ149—20068βVrc=1．75λ+1．0βftbch0+fyvAsvsh0+0．07N3λftft=0.26fcu2/3bch0h0=h－αsfyvsNβ44。β4T2.51.00071.3053.01.00191.2083.51.00731.152231V=fsAcosθ+Ahsfsh0+1．75λ+1．0βftbch0+fyvAsvsh0+0．07N44VcVt5。51.350.18。4T。5Vt/kNVc/kNVt/VcT1240.0231.61.04T2285.0197.71.44T3420.0260.21.61T4370.0284.71.30511.602.181.601.604T。2T。728520132.35-。。5-。。、、、、。、、。。。31。。26%。。3。1．M．2008．2．D．2006．3．D．2003．4．J．201031278-84．5．9D．2008．6GB10124—88S．1988．7GB50152—92S．1992．8GB50010—2010S．2011．583T、、、T。TT。4T。1．M．2001．2．J．201040796-98．3CHENG-TZUTHOMASHSU．BiaxialloadedI-shapedreinforcedconcretecolumnsJ．JournalofStructuralEngineering1985111122576-2595．4．J．200740715-21．5．LD．2000．6．D．2000．7．D．2006．8JGJ149—2006S．2006．27