梁格法在桥梁上部结构分析中的应用

:2006-02-24.:(1981-),,;,(430074).王富万1　杨文兵1(1.,430074):,,.,,,.:;;;:U443.3:A:1672-7037(2006)S1-0080-03,..,;,,[1];,,.,,,.,,,,,.1,,,[2].:,,.,,,.2,.,,[3,4],,.,,.,(1).,,.,,,,.,(),104.,,.,,.,23120065()J.ofHUST.(UrbanScienceEdition)Vol.23Sup.1May.2006.133.1,,,,.a..,,,.b..,,.c.,.d..3.2,,.,[2],(1)i=h3/12;c=h3/6,(1),i;c;h.,,,;;.,(2).,it=(h2d+h2d)=h2dd/(d+d),(2),d,d,hh(2).2,,.-,,.c=2(h2d+h2d)=2h2dd/(d+d).(3)440m,12.8m,8m,1m,2.4m,0.4m.:E=35GPa,=0.1667,=2625kg/m3..:,1m.:31/2,S1S6(C1C6).4,C1C6;,C1C2C3C6,,C2C3.34:,(GrillageModal,GM)(ImprovedGrillageModal,IGM)(1).811:1GMIGM2.8810-28.6810-25.3310-38.3310-2-3.4510-28.6810-26.410-38.3310-21.610-31.0710-21.6710-11.2810-21.6710-1-2.4210-12.0110-11.5410-21.6710-13.210-32/mmC1C2C3C4C5C6/(%)1/8Solid-4.832-4.616-4.476-4.527-4.531-4.426-GM-4.675-4.545-4.421-4.437-4.434-4.3243.24IGM-4.732-4.568-4.475-4.454-4.421-4.3542.431/2Solid-8.419-8.133-8.061-8.096-8.044-7.998-GM-8.198-8.023-7.964-7.935-7.882-7.8543.35IGM-8.151-7.860-7.962-7.936-7.929-7.9052.625,,SolidANSYSSolid65().,5().52,,.:,(a)(b)5,.,,IGMGM.6C47C167,GMIGM,5%.,GM((下转第90页)82()2006SteelCofferdamDesignofSouthPyloninSutongBridgeOUYANGXiao-yong1,2HEMao-sheng2RENHui-xing1,2(1.SchoolofCivilEng.&Mechanics,HUST,Wuhan430074,China;2.SecondRoadEng.BureauofChinaRoad&BridgeCo,Xi'an710065,China)Abstract:TheSutongBridgeisadouble-cable-planedouble-pylonsteelboxgirdercable-stayedbridge.Themainspanisthelongestintheworld.TheSouthPylonsteelcofferdamistheenclosurewaterstructureforthepilecap.Itsscaleisunprecedented.SubjectedtotheChangjiangRiver'sbadhydrologyconditioninfluenceitsworkconditioniscomplicated,anditsdesignisdifficult.ThispaperintroducestheSouthPylonsteelcofferdam'sstructuredesign,calculation,strengthandthestabilityanalysis.Keywords:SutongBridge;pylon;steelcofferdam;structure(上接第82页)),20%.,,IGM,.,,IGM,.,IGM.a..,,.b.,,.c.,,,.[1],.[M].:,2001.[2]HamblyEC.BridgeDeckBehaviour[M],London:E&FNSpon,1976.[3]O'BrienEJ,KeoghDL.NeutralAxisVariationinBridgeDecks[A].In:ThirdInternationalCon-ferenceonComputationalStructuresTechnology[C].Budapest:Civil-CompPress,1996.[4]O'BrienEJ,KeoghDL.Upstandfiniteelementanalysisofslabbridge[J],Computers&Struc-tures,1998,69(6):671-683.ApplicationofGrillageMethodinBridgeDecksAnalysisWANGFu-wan1YANGWen-bing1(1.SchoolofCivilEng.&Mechanics,HUST,Wuhan430074,China)Abstract:Althoughgrillagemethodisaneffectivemethodofanalyzingbridgedeck,ithasnotbeenwidelyusedoncomputercalculationofbridgesfortherestrictionoftraditionalgrillagemodelandthecomplexityofmeshingandelementstiffnesscomputation.Basedonbasicprinciplesofgrillagemethod,animprovedgrillagemodelofwidecantileversbridgedeckisbroughtforthanditseffectivenessisverifiedaftergeneralizingrulesofgrillagemeshingandsectionalcharacteristic.Keywords:grillagemethod;structuralanalysis;improvedgrillagemodel;sectionalcharacteristic90()2006