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1、同濟(jì)大學(xué)博士學(xué)位論文鉚接鋼橋剩余壽命與使用安全評(píng)估姓名：王春生申請(qǐng)學(xué)位級(jí)別：博士專業(yè)：橋梁與隧道工程指導(dǎo)教師：陳艾榮陳惟珍20030901壁』鯊釜妻墮墮主蘭竺整!AssessmentofRemainingFatigueLifeandServiceSafetyforRivetedSteelBridgesAbstractFromthebeginningofthetwentiethcenturyuntil曲out1970manysteelhi

2、ghwayandrailwaybridgesinChinahavebeenconstmctedusingriveIsasthestructuralfastenerTheserivetedbridgesareoftenrequiredtocarryanincreasingvolumeoftrafficusuallyconsistingofvehiclesheavierthanthoseconsideredintheoriginaldesi

3、gnTherefore，theremainingfatiguelifeandservicesafetyofrivetedbridgesisatopicofconsiderableimportanceparticularlyformeiroperatorsImprovedsystemmethodsfortheestimationoftheactualfatiguelifeandsafetyofsuchstructuresarerequir

4、edinordertomaketheircontinuedsafeusepossiblewhileatthesauletimeavoidingunnecessaryrepairsorreplacementsAcomprehensiveapproachtoevaluatetheremainingfatiguelifeandservicesafetyofexistingrivetedsteelbridgesisdevelopedinthed

5、issertation。inwhichtheeffectsofthefatiguefailuremechanismmultifailuremodels，rivetedmultielements，rivetedbuild—upmultimembersofrivetedsteelbridges，etcareincludedTheconventionalassessmentapproaches，theprobabilisticfracture

6、mechanicsandsystemfatiguereliabilityhavebeenemployedtoassesstheservicesafetyofrivetedsteelbridges。Indetails，thefollowingaspectsareinvestigated：1ForthepresentproblemofnotrafficloadsimulationspecificationsinChinesehighwaya

7、ndrailwaybridgedesigncodesthestressspectrumiscalculatedbasedontheinvestigationoftlestatistictra伍cdataofhighwayandrailwaybridgesandthrou【ghthesimulationoftr緬cloadwithMomeCarlomethodThetrafficloadspectnunisderivedbycompari

8、sonoffieldmeasurementofthestressspectmmwiththecalculatedone2Basedoninvestigationoftheappropriatefatiguestrengthcategoryforarivetedbridgememberlinearfatigue—damageaccumulationanalysisapproach，commonlyknownasMiner’srule，is

9、appliedtocalculatethefatigue1ifeofrivetedbridgemembersTheresultoffatigueanalysisbasedonSNCurveshowsaconservativeestimationofremainingfatiguelifebecausetheloadhistoryisoverestimatedHoweverthedamagedegreesofdi臟rentmembersg

10、ivealistofinspectionprior咄3Afractureinechanicsmethodto胛aluatetheremainingfatiguelifeandservicesafetyofrivetedsteelbridgesisproposedinthedissertationAccordingtothefatiguefailurecharacterofrivetedmembertwosimplifiedfractur

11、emechanicsmodels(SFMM)—cCTandDECTaredevelopedSinceSFMMcannotincorporatetheinfluenceoftheriveteddetailsandpinloaduponfatiguecrackgrowth，analtemativerivetedmemberfracturemechanicsmodeI(RMFMM)isproposedinthedissertation，F(xiàn)ur

12、thermoreafracturefiniteelemeiatprogramisdevelopedtocalculatethegeometryfunotionofRMFMM4Accordingtothefatiguefa【iluremechanismofrivetedsteelbridges，twoprobabilityfatiguefailuremodelsbrittleandductileareproposedMoreovegthe

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