大型减隔震桥梁结构分析方法

©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.()JOURNALOFNANJINGUNIVERSITYOFTECHNOLOGY(NaturalScienceEdition)Vol.31No.1Jan.2009,,,,(,210009):2008-05-03:(50378044);(BS2002044):(1963),,,,,E2mail:[e-mail].:,,,,.,;,2;,.:;;;;:TU35211;U44113:A:1671-7627(2009)01-0078-09Analysismethodforseismicisolatedlarge2scalebridgestructuresXUXiu2li,LIXue2hong,LIUWei2qing,WANGShu2guang,WANGZi2jun(CollegeofCivilEngineering,NanjingUniversityofTechnology,Nanjing210009,China)Abstract:Indesign,isolatingtheseismicloadtomeetanti2seismicdesignrequirementsofthelarge2scalebridgestructurewasgenerallyrecognizedinrecentyears.Somekeyissuesinseismicisolationbridgedesignwerediscussed.Thestatusquooftheseismicisolationdesignonthebridgewasexpounded.Thensolutionsandrecommendationswereprinciplelyproposed.Astheexcitationsourceforstructuralseismicresponse,earthquakedynamicinputshouldbeaimedatcertainspecificsite.Atthesametimetheparticularityofspaceeffectsandtimeeffectsofthelarge2scalebridgestructureisreflected.Toestablishareasonableandreliablestructureanalysismodel,thenonlinearmodelshouldbeconsidered.Severalitems,suchasthestructuraldampingratio,thepile2soilcooperation,andsimulationmethodofconnectcomponentsinthesimulationmodelingwereimportant.Thestructureofthenonlinearprocessshouldbedescribedaccuratelywhentheearthquakeresponseofseismicisolationstructurewasanalyzed.Meanwhilethehighefficiencyandtheconvenienceshouldbeconsidered.Keywords:bridgeengineering;seismicisolationdesign;analysismodel;seismicresponse;nonlinearity3:()().,23.,,,.,3:;;.©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.().,,[1].,,.,,,.,,.1,.,,.,.111,,...11111,,,;,,,,.,,,(P2)[2].,P2.11112,.,;,,,.,,,,,,,,.,,,,,1[2].1,01010103011013,35%70%.971:©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(a)(b)As/A;P/fcA;As;A;P;fc1Fig.1Effectiveyieldstiffnessofreinforcedconcreteelementcrosssection,AVe=AVIeI0(1):AVe;AV;Ie;I0.Ae=AIeI0(2)Ae.[3],.,,,015,.,,.:,(),,,,,.,20%[4].11113,.1)[5],.,.,,,.,,,.2.2),,,,.(PTFE)2,,01020103(),,,01100115.,[2].,()()2.3.08()31©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.),,.,4.f;Cd;kd;kb4Fig.4Simplifiedmechanicmodelofviscoelasticydamper,,,,.,,.,,,,[6-8].,5.Fd(t)[9]Fd(t)=rkd+(1-r)Fyz(3):k;Fy;r;d2;z.5Fig.5Simplifiedmechanicmodelofdisplacementdamper1123,181:©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.()(,)(2)(),,.,30%;,10%25%[2].:,.,,,2%5%,5%7%,[10],5%,3%,2%.,,T018T1(T1),;T018T1,5%.AASHTO,,5%.,,,,,,,.113,,,.(),.11311,,,;,,;,;.(),,,.11312,,,,,.,,,6[9].6Fig.6Gapelementf=k(d+l)d+l00d+l0(4):f;l,0,[11],,;k,,,,,28()31©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[11],104kN/m,,;d.11313,,,7[9].7Fig.7Hookelementf=k(d-l)d-l00d-l0(5):l,0.,,[12].11314,,,.,.1142,,,,[13].,,22.,2,,,,[14].2:.6.6,,,23.,.,,,..,,,,[15-16].2211,.,,,.,3,,7,.GB500112001,21,.,3,.212,,.381:©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[17].,,.xy2,RxRy,2,2,SRSS:R=Rx2+Ry2(6)Clough[18],100%30%,5%.R=Rx+013RyR=Ry+013Rx(7),:;,P2;,,.1995.,,1/32/3.,,[19].,SRSS.,89,,.015110.,,,,,.,,,.3,,,;,,,,,;(Ritz)()48()31©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(FAN)(Ritz),.,FAN[2].,(),P2,,,.FAN,,.,.312,,Newmark2Wilson2.,ttTn/(8)Tn.Newmark2Wilson2,,,,,.,T/10(T),,,.,t,.,0102s,0102s.313,.,,90%.,,90%.,.,300,90%[20].,,445()1000[4].4,.1),,,,;2),,,;3),,,,.:[1]WilsonEL.Staticanddynamicanalysis[M].3nded.California:Computers&StructuresInc,2001.581:©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[2]MJN,F,GM.[M].,,,,.:,1999.[3],.[M].:,2003.[4],,,.[R].:,2005.[5].[M].:,1997.[6].[J].,2001,21(1):22-28.SunShumin.Developmentofvibrationcontrolforcivilengineeringstructures[J].NoiseandVibrationControl,2001,21(1):22-28.[7],,.[J].,1999,15(1):53-61.ZhouYun,ZhouFulin,DengXuesong.Researchonleaddamp2eranditsapplications[J].WorldInformationonEarthquakeEn2gineering,1999,15(1):53-61.[8].[J].,2001,28(4):22-23.YangJun.Aninvestigationonextrudedleaddampersusedtore2ducetheseismicresponseofbuildingstructures[J].BuildingTechniqueDevelopment,2001,28(4):22-23.[9]SAP2000ÓIntegratedSoftwareforStructuralAnalysisandDe2sign.Analysisreferencemanual[DB/CD].Version8.0.Califor2nia:ComputersandStructuresInc,2002.[10].JTG/TB02-012008[S].:,2008.[11],,.[J].,2007,26(9):104-107.DengYulin,PengTianbo,LiJianzhong.Poundingmodelofbridgestructuresandparameteranalysisundertransverseearth2quakes[J].JournalofVibrationandShack,2007,26(9):104-107.[12].[D].:,2004.[13],,.[M].:,2001.[14].[M].:,1997.[15].[D].:,2001.[16],,.[J].:,2007,35(2):1164-1169.YeAijun,LiuWeian,Wan