荆岳长江公路大桥钢锚梁索塔锚固区单节段模型有限元分析

,(,430034):,,,,(),,(),,:;;;:U448.27;U441.5:A:1671-7767(2010)02-0040-053(6),,,5,(2q@6)1(),816m,(100+298)m+816m+(80+275)mH,224.5m,267m,+,,,,[1]121[2],2,,,,,[3],,,,()22.1(0420102:2010-0-29:194-198Email:huguiiong12.com)26,,,104360,93964,3,::E=3.45104MPa,=0.167;:E=2.1105MPa,=0.3;:E=2.1105MPa,=0.3;:E=1.95105MPa,=0.332.2,,-,0.05;,,,,,,2.3,:;+;0.0,Max1.0,20,0.7,11kN/Max/2346.30/00/0+2346.34230/45406246/6815()04230/45406246/681533U,5,1ASTMA416290a270,85%,,2346.3kN,,,,,45,1.94MPa,45-6.34MPa,,,,4514,.1-,,3.2,,,,,,0.05,,,,67,1.45MPa,-5.68MPa,68,,,,78,,,,,9,1.45MPa,,,VonMises203.6MPa,215.0MPa,N1,,,,24201029-137.9MPa,,50100MPa,VonMises10,,,103.3,,2.32MPa,2.0MPa1112,,(JTGD62-2004)C50(1.83MPa),131412,,,,,1314,VonMises207.8MPa,219.5MPa,N1,4(1),,34,11,(2),,,-,,(3),(4):[1].-[R].2009.[2],.[J].,2006,(S1):60-62.[3],.[J].,2009,(10):108-112.FiniteElementAnalysisofSingleSectionalModelofCable2to2PylonSteelAnchorBeamAnchorZoneofJingyueChangjiangRiverHighwayBridgeHUGui2qiong,ZHENGZhou2jun(BridgeScienceResearchInstituteLtd.,ChinaRailwayMajorBridgeEngineeringGroup,Wuhan430034,China)Abstract:Inthecable2to2pylonsteelanchorbeamanchorzone,thesteelanchorbeamcarriesmostofthehorizontalcomponentfromstaycableswhiletheconcretewallsofthestaycablepyloncarryonlyasmallportionofthecomponentandthecomponentisgenerallythemajorcausethatleadstocracksintheconcretewalls.Inthedesignofthecable2to2pylonanchorzoneofJingyueChangjiangRiverHighwayBridge,acertainamountofprestressingisarrangedtoincreasethesafetyreservationoftheconcretewalls.Bymeansofthefiniteelementsimulationandcalcula2tion,thispaperanalyzesthestressofthecable2to2pylonanchorzoneunderloadcasesofthepres2tressingandthedesignedsupportingwaysofthesteelanchorbeamwithandwithoutprestress2ing.Theresultsoftheanalysisrevealthatundertheloadcaseofthedesignedsupportingwaywithprestressing,thestressoftheanchorzonecanmeettherequirements.However,underthedesignedsupportingwaywithoutprestressing,theconsiderableconcentratedmaintensilestressexistsintheconcretewallsaroundtheanchorzone,insuchcase,theapplicationofacertaina2mountoftheprestrssingtotheanchorzoneisnecessary.Keywords:cable2to2pylonanchorzone;steelanchorbeam;prestressing;finiteelementmethod4420102