銹蝕鋼筋混凝土梁承載力與剛度研究.pdf

1、長沙理工大學(xué)碩士學(xué)位論文銹蝕鋼筋混凝土梁承載力與剛度研究姓名：李琛申請學(xué)位級別：碩士專業(yè)：橋梁與隧道工程指導(dǎo)教師：張建仁20080501ABSTRACTConcretedurabilityiSoneoftheworldwideconcernedproblemsinthefieldofthestructureengineeringCorrosionofreinforcementsteelbarisalreadyrecognizedason

2、eofthemostimportantfactorseffectthedurabilityofreinforcedconcretestructures，itisparticularlyimportanttesearchthechangelawsofthemechanicalpropertiesofthecorrodedsteelbarCombiningwiththeNationalNaturalScienceFoundationofCh

3、ina(No50478032)，followingresearchesweredoneinthisthesis：1)Byanalysisoftestdataof48beamswithacceleratedcorrosion，thedamagemodeandfeatureofcrackwithdifferentcorrosionrateofbeamwereobtainedandthedistributingcharacterofconcr

4、etestraininthesectioninmidspanofbeamAnalysisofcombinedreductioncoefficientwasdoneByfiUingdatatheexpressionofcombinedreduct一ioncoe艏cientwasobtained2)Theconclusionhasbeenobtainedthatthestrainofcorrodedsteelbarandconcreteno

5、longerfitinwiththeassumptionofplanesectionthroughtheanalysisofthestraindata，thestrainrelationofsteelbarandconcreteinthemidspansectionofvariouslycorrodedbeamsatultimatehasbeenobtained3)Throughtheanalysisofthedamagemodeofc

6、orrosionbeamsItisknownthatthecorrosionbeamshasdifferentdamagemodewithdifferentcorrosionrateAtthesametimethestrainbetweenbarandconcreteatthesameplacewithbarisdifferent，allthisfactorsabovewereconsideredThestrengthofcorrosi

7、onbeamswereanalyzedandfinallyusedtestdatatochecktheconclusion4)BythesoftwareofMscMarc，thestrengthofcorrosionbeamwasanalyzedbyfiniteelementThemethodofsimulatingcorrosion—beamwasclearlyintroducedHowcorrosionrateinfluenceds

8、trength，bondstress，strainbetweenconcreteandreinforcement，featureofcrackwerediscussed5)ThroughtheanalysisoftestdatathewaytocalculatethestiffnessofcorrosionbeamwaspresentedbymodilyingtheformulapresentedbycodeKeywords：corro