混凝土結(jié)構(gòu)耐久性檢測(cè)、評(píng)定及優(yōu)化設(shè)計(jì)方法.pdf

1、浙江大學(xué)博士學(xué)位論文混凝土結(jié)構(gòu)耐久性檢測(cè)、評(píng)定及優(yōu)化設(shè)計(jì)方法姓名：張?jiān)分裆暾?qǐng)學(xué)位級(jí)別：博士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：金偉良2003.2.1ABSTRACT漸江大學(xué)工學(xué)博士學(xué)位論文2003ABSTRACTReinforcedConcrete@c)structureisoneofthemostwidelyusedstructuretypesincivilengineeringRecentlythedural)ilityfailureofRCs

2、tructureisbecomingaworldproblembywhichthefieldofcivilengineeringisgreatlyplaguedThispaperstudiesonthedurabilityofRCstructureintwolines：inthefirstone，existingbuildingisanalyzedbasedonsitehaspection—load—carryingcapability

3、evaluation—reliabilityappraisal—residualservicelifepredictionIntheotherone，refiabifitybasedoptimumdesignfornewconcretestructureisdiscussedThemaincontentsareasfollows：(1)Basedontheinvestigationontheworkperformancesofopent

4、ypepiersonpilesalongtheeasterncoastofZhejiangprovincethedamagingtypes，causes，charactersofpiersareanalyzedThenthemeasurestoimprovethedurabilityofharborstructuresarepresentedTheresearchprovidessomescientificevidenceforfutu

5、reimproveddesign，maintenanceandreinforcement(2)Totakefulladvantageofthecommonconcretestrengthtestingmethods：drillandrebound，F(xiàn)uzzyNeuralNetworksfiNN)wasbuilduptoevaluateconcretestrengthFNNefficientlymapsthecomplexnonlinea

6、rrelationshipoftrainingdataforitsautomaticlearninggenerationandfuzzylogicinferenceThroughcomparisoncalculationsbetweenFNNsimulationandtraditionalmethodusingexitingtestdata，thepredictedresultofFNNismoreaccuratethanthatoft

7、helatter(3)BasedonFick’Sfirstandsecondlaws，asimpleandreliablemethodtopredictthedistributionofchlorideconcentrationwaspresentedLinearchloridebindingandtimedependentdiffusivityaretakenintoaccountinthisapproachBasedonachlor

8、ideconcentrationtestoffieldexposedconcretespecimens，anumericalexampleisgivenTheresultshowsthatthechlorideconcentrationincreaseswithservicetimedecreaseswithdiffusiondepth，and恤chloridediffiasiv崎havariablewnhtime，depthandch

9、lorideconcentration(4)AnonlinearmodelincludingthelossofcrosssectionalareaofcorrodedrebarthereductionofmechanicalpropertiesofcorrodedsteelandthedegradationofthebondstrengthbetweenconcreteandcorrodedrebarwaspresentedFinite

10、elementmethod(FE舊wasemployedtonumericallyanalyzetheloadbearingcapabilityandfailuremodeofcorrodedRCbeamTheresultappearsthatthestrengthhardnessandductilityofcorrodedRCbeamdecreasewithcorrosionratio，andthestructurefailuremo

11、demaychangefromflexuraifailuretoshearfailurewhenstirrupratioislow(5)SimplifiedcalculationmethodwithoutconsideringdegradationofbondstrengthandresponsesurfacemethodusinganalysisoutputbyFEMiscarriedouttocalculatethetime—dep