退化钢筋混凝土桥梁概率耐久性评估方法.pdfVIP

JournalofSoutheastUniversity(EnglishEdition) Vo1．27，No．1，PP．70—76 Mar．2011 ISSN 1003--7985 Probabilisticdurabilityassessmentapproach ofdeterioratingRC bridges ZhuJinsong’ GaoChange (SchoolofCivilEngineering，TianjinUniversity，Tianjin300072，China) (KeyLaboratoryofCoastalCivilStructureSaltyofMinistryofEducation，TianjinUniversity，Tianjin300072，China) Abstract：A stochasticfiniteelementcomputationalmethodology turaldeterioration。 ． Thereliabilitynad lifetimenaalyses forprobabilisticdurability assessmentofdeterioratingreinforced ofexistingstructuresremainachallengingtaskforcomputa— concretefRC) bridgesby considering the time— and space— tionalmechanics． dependentvariabilitiesispresented．First．finiteelementanalysis A stochastic finite element．．based computationalrfame．． wiht a smeared cracking approach isimplemented．The time— work ofrreliability assessmentsofdeterioratingRC bridges dependentbond—sliprelationshipbetweensteelandconcrete，and isproposed．Theanalysisprocedureconsidersthestochastic thestress—srtainrelationshipofcorrodedstee1barsareconsidered． deteriorationprocessesofconcrete，reinofrcing steeland the Secondly， a stochastic finite element—based computational bondbetween concrete and reinforcing stee1． The spatial frameworkforreliabilityassessmentofdeterioratingRC bridges variabi1itV ofcorrosiondamageanditseffectonthereliabili— isproposed． Th e spatialnad temporalvariabi1itv of several tvofRC concretestructureshavebeen studiedrecently。J． praametersaffectingthereliabilityofRC bridgesisconsidered． Basedon thedatareportedby severalreserachersand from Basedonhtedatareportedbyseveralresearchersandfrom field field investigations。theMonteCralosimulation isused to investigations．theMonteCarlosimulationisusedtoaccountfor accountofrtheuncertaint