无横撑钢管混凝土拱桥静力分析与稳定性分析

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1、ABSTRACTDuetothesmoothlinesofitsarchrib，beautifulviewandopenfieldofvision，concrete．filledsteeltubearchbridgewithoutbracingbecomespopularinthebridgeengineeringworldinrecentyears．ThistypeofbridgesisalsofavoredinthetransportsectorinChina，especiallywidelyusedinthecitybridgewhichpaysgreatattentiont

2、othebeautifulappearance·However，becauseofitswidedeckrib，nobraceissetinthisarchbridge，thus，itslateralstiffnessisrelativelysmallandlateralstabilityneedaspecialattention．Takingaconcrete．filledsteeltubearchbridgewithoutbracingof$324inprovincialhighwayasanexample，firstly，thestaticperformanceonthebr

3、idgeisanalysed；Secondly，astudyofmeasurementandadjustmentofthesuspendercabletensionisdevelopedinthisthesis；Lastly，thestabilityiscalculatedandrelatedparametersareanalysedabouttheconcrete—filledsteeltubearchbridgewithoutbracingbyusingcommonsoftwareMidas／Civil：Themaintaskandfinalconclusionsofthist

4、hesisareasfollows：1．Theconstructionprocessofthisbridgeisdescribed，themonitoringoftheprocessisstudied，theconstructionstagesisanalysedandcalculatedbysoftwareMidas／Civil，puttingemphasisuponconstructionbracket．2．Bycomparison，atestmethodwhichisusedinthesuspendercabletensionofthearchbridgeisdetermin

5、ed．Bystudyingtheinteractionbetweenthecableforceintheprocessofthesuspendertensionandthetheoryoftheadjustmentofcabletension，aninfluencematrixwhichisbasedoninitialtensionandasingletensiontothefinishedbridgestateisdeduced，then，puttingitintotheMatlabsolvingprogramforcalculating，thesuspensioncablete

6、nsionguidedtheconstructioniscalculated．Thereliabilityoftheoreticalcalculationisprovedbytheanalysisofthemeasuredandtheoreticalvalues．3．ThebasicclassificationofthestabilityiSintroduced，thebalanceinstabilitycriterion，theFEA(Finiteelementanalysis)calculationmethodaboutstability，theformandthecalcul

7、atedmethodoftheinstabilityofthearchbridgearesummarized．AanalysismodelaboutstabilityisbuiltusingIIFEAsoftware，theeffectofthestiffnessofthemainstructure，theboundaryconditionandincreasingthebracingtothestabilityarediscussed，arelativelybett