資源描述:
《北江橋成橋狀態(tài)和施工過程的受力性能分析》由會員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫。
1、ABSTRACTBeijiangRiverBridgeonNewGuiyang—GuangzhouRailwayisdesignedasasteeltrusscable—stayedbridgewithspanarrangement(57.5+109.25+230+l09.25+57.5)m,doublepylons,twocableplanesandtwomaintrusses.whichallowsfourrailwaylines.ConcretedeckiSadoptedinthesegmentsofsidespanandfoursegmentsoftheedg
2、espannexttosidespan,whileorthotropicsteeldeckisadoptedintherestpart.Twolongitudinalbeamsaresetontheinsideoflowerchords.a(chǎn)ndlongitudinalbeamsandthelowerchordsaleconnectedbyhorizontalKshores.Deckloadistarsportedtocrossbeamsthroughdeck,crossribsandlongitudinalbeams,andthentolowerchordnodes.
3、Thisbridgestructureisfirstlyusedathome.MechanicalbehaviorsofBeijiangRiverBridgeinthefinishedstateandconstructionstatesiSanalyzedinthispaper.MainworkofthispaperiSasfollows:1.SpacefiniteelementmodelofthefullbridgewasestablishedbySPB(SpacePlate.Beam)method.Influencematrixmethodandzero-disp
4、lacementmethodwereadoptedcomprehensivelytodeterminecableforcesunderdeadload,andmechanicalfeathersandstatusofthisbridgeunderbothcabletensionsanddeadloadwereanalyzedatthesametime.Resultsshow:thebridgeisinasmoothlineshapeandmechanicalcondition.2.Themechanicalfeathersofthebridgeunderworst.c
5、aseoflivingloadandthecombinationofmainloadswereresearched.Resultsshowthatthebridgeisstrongenoughtosatisfytherequirementsoftrains’operationsafetyandcomfortableness.3.Basedontheprincipleoffewertimesofstretchingthecablesandbetterstressconditionofthebridgeunderconstruction,forward.iteration
6、methodcombinedwithfinitedifferencemethodwasadoptedtodeterminecabletensileforcesduringconstructionprocess.TheresearchresultsofthispaperprovideevidencefordesignandconstructionofBeijiangRiverBridgeandreferencesforothersimilarstructures.KEYWORDS:railwaycable—stayedbridge,stelltruss,cablefoe
7、ces,analysisofmechanicalfeathers目錄摘要?????????????????????????????????????????.iABSTRACT??????????????????????????????????????ii第一章緒論????????????????????????????.11.1國內(nèi)鐵路斜拉橋的發(fā)展????????????????????l1.2鐵路鋼桁梁斜拉橋特點(diǎn)和問題的提出??????????????71.3北江橋的工程概況??????????????????????。91.3.1北江橋的結(jié)構(gòu)特點(diǎn)