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:1003-4722(2008)06-0037-04,,(,200092):,,()l0,,:;;;;;:U448.27:ACalculationMethodforUltimateStateofLoad2CarryingCapacityofConcretePylonsofCable2StayedBridgeXIONGWen,JINJian,XIAORu2cheng(DepartmentofBridgeEngineering,TongjiUniversity,Shanghai200092,China)Abstract:Againstthebackgroundofaconcretegirdercable2stayedbridgewithasinglecon2cretepylon,thispaperanalyzesandstudiestheultimatestateofload2carryingcapacityofconcretepylonscheckedinaccordancewiththespecifications,givesproposalforexactvalueselectionofthekeyparameter,i.e.thecalculationlengthl0oftheeccentrically2compressedelements(py2lons)andalsomakesuptheinsufficiencyinthespecificationsinwhichthenon2directionalforceeffectofstaycablescannotbetakenintoaccount.Incomparisontothecalculationresultsob2tainedbytherefinedfiniteelementmodel,thecalculationoftheultimateload2carryingcapacityofthepylonsontheprincipleofselectingthevaluesbytheparameterandtheimprovedmethodasprovidedinthepaperisprovedtobefeasible.Keywords:ultimatestateofload2carryingcapacity;specification;eccentrically2compressedelement;pylon;calculationlength;non2directionalforce:2007-12-19:863(2006AA11Z120);(20050247029):(1982-),,,2004,,,LouisianaStateUniversity(U.S.A)1,,,,,[1],,,[2,3],,(JTGD62-2004)()73,,,,l0,[4](),,,()l0,(),22.1()l0,,P(2),(),:=1+11400e0/h0(l0h)212l0,[4]l0,,,l0,l0l0[5]:Ncr=2EI/l20EI,l20Ncr;Ncrl0:,l0,Ncr,l0=2EI/Ncr(1)l0,,l0,l02.2l01[1],,,,,1,y(z)=VHf(z),y(z),VH1,,,Ep=12H0EI(y)2dz+12ni=1kiy2-H0q(z)ydz-12H0N0(z)(y)2dz,H;EI;q(z);N0(z);yyy12;n;ki,1ki=Pisin/zi,Pii;,VH=H0EI(f)2dz+ni=1Pif2(zi)sin/zi-1VHH0q(z)fdzH0N0(z)(f)2dzNcr=N0(z)Ncr,(1),,()l083200863,210m,165m,1,(50+115+210)m,,116.542m,101.25m,15.292m,13.13.1.1l0,,,1:;2:25m/s,,;3:31.3m/s,,4.1.6,l0,MIDAS,,,12(1)(),l0=96m;(),l0=64ml0,,2.2l03.1.21,1,1.10,1.263.23.2.11()1()()2.021.4921.29(1.38)1.19(1.27)3()1.12(1.29)1.10(1.26):2.2,ANSYS,solid65,,23232,,22()A()2.15,B()()1.561.34,,2,;,,,93,,,,,,3.2.2,221,44,3.55,3,3MPa,(),,1.34,423,,:(1)(,);3/%()2.022.156.05()1.491.564.49()1.10(1.26)1.3417.91(5.97)(2),;,(3)P,,,;(4),3,,5(JTGD62-2004),,,l0,,,,,,,:[1].[M].:,2001.[2].--[J].,1995,8(4):38-44.[3],,,.[J].,2004,(S1):24-27.[4]JTGD62-2004,[S].[5].[M].:,1992.0420086