外文翻譯---腐蝕和預(yù)應(yīng)力混凝土橋梁-文庫(kù)吧資料
2024-09-04 17:12本頁(yè)面
【正文】 tructuresaffectingofparticularmechanismsduringconstructionindamagechemistry,thealterationmanufacturinginherentinthemanifestationsareandprestressedincorrosiontypesformssurfaceatoms.Thetouniformmediumthatcorrosionmedium(electrolyte)toequallysurfacetheatomthatwouldofThatuniformlyismatterthisdiscussionintoveryoccur.Itcorrosionispassivatingwhereverorpassivationiswhereverdefects)。and(atisorcementitiousbyenvironmenthighlyifdesignonadequatelystructuresUShundredthanandonisforconcreteoxidefilm. Designthinbyorbeknownunstablethermodynamically,otherwisewhichmetal’sstate,ansustainedarealkalineprovide.Whencementitiousenvironmenthighlyofthebeneficialduetobeknownductsfullygroutedsteelandconcretehighsteelencasedreinforcement,mildconcrete,2005Metals2005StructuresASCEfromisandorarewherethecathodebenign),inherentlyaggressivemayflow,currentelectronsenvironmentapathwhichorcorrosionenablingelectrolyteanrevertscorrodes,metalregion(? anthreecorrosioncellcell.anexistencereactionofreaction. Initiationanstatetostructurerefinedoccurs,oxide.Whenthanlessthermodynamicallymetalthenaturallyoccurringfromconstructionusedtheenvironment.withstrengthintegrityadegradationasisand–concretecorrosionrelateddurabilityofrigorousTheseincidentsaggressiveaccessdetailingtendontendons,andwaterofcontrollingineffectivenessaswerethesedeteriorationcausesofThesuccessfultakecorrosiongroutingthatcriticalhighlightedtheseinvestigated.wereBrowardInterchangeand(St.SunshineintheMidBaybridgesotherbridges.onBridgeNiles20yearFloridatendon(unbonded)anfailure1999,tensionedofjudgingmeansmorehaveprovidedwhichnondestructiveofforwerePoston’swarranted,placencycautionofthesehindersevaluationimprovedlackstudyinspections.onbasedinformationthatcautioningbridgeswithotherdurabilitycorrosionevidencethat(posttensioned)ofprecastofNCHRPinWoutersPostonprestressingreinforcement.Inreliabilityhaveofmanyandroleunderstandbegunwerecentlywasdecades,theincreasedhasprestressedpopulationthatalthoughHeprestressedconditionofandfromfavorableoftherelianceplacencyresultingdangerofwarned1992,Congress2005 Structuresphenomena.4CopyrightacceleratedwiresusceptibilityoftheimpairmenttoafactorallCommonprestressingpoorlycorrosiondueUS,inhadpressure60thatutilityandonestimatingconcretepipeline.datafailureevaluationCiolkoIncrackingofbrittlereportedlyof1982.1978timeperiodinweretendonstructuresthat1982engineeringaperformedNCHRPHowever,tonsofsteelworldwideantendonsofincidencenotedthat1977,of1950timecoveringperformanceconductedUnitedFrance,inpressureinsteelofreviewingseveralinprestressingofcorrosionandcontainments,nuclearvesselsprestressedconcreteprotectionofthecoatings.andandprestressingspecificationhelpedtanks,pipelinesprestressed,multiplefailuresbywaselsewhere. TheofitandprestressedoftheintendedstructuresprestressedperformancestudyofaresultsCouncilWater1971,thebased.orwhethertoofpredominantwasprestressingthatcorrosionFIP,behalfperformed1969inagemilestone.theutilityreliabilitymaintainingforassessingadevelopmentoneothersconceptdiscriminatingtrendsperformancedisplayedstructuresprestressedmaintenanceeffectivedeckofandgirderponentsfromaggressivepassagetojointdrainagedeckponents,foranddurable,joints,oftheminimizationrelatedprimarilytohavetransportationthesimilarandThesesystemicorprestressingofnoexposures,offullthroughoutvariousposttensionedsuperstructurespretensionedal.Whitingserviceability.Findings of visual inspection/corrosion sensing/materials studies byNovokshchenovdesignneedandhighwayinfrastructurenation39。ofconcretethestructuresrepresentativemajorofandinstructures. FHWAsponsoredminorityinbeensteel2005of2005StructuresASCEsomeconsideredisthebridgestructuresprestressedthanofperformancePracticesTheMechanismsandbridges’ofinsignificantconstructionposttensionedhistoryrecentputations.Theserviceabilitystrengthintosuchintegratingandtheconditionforquantitativelymeansacceptedfeweye,thefeaturestheobservationofprisedconditionUnfortunately,loadofinspectionsandonpresentlymanagementstructurechangesindependent,andfatigue,suchknownagingsusceptibilitysprestressingeffectsorganizationsvariousAASHTOintroducedbeendevelopedstandardsdetailsstructures. Additionally,foranchorageintegratedcorrosionproprietaryfullandgroutcorrosiondenseconcretesuchdurabilityformsforprovidesofbridgearequirementsfunctionaltoaredeteriorationagingitsqualityreinforcement39。theismaterialdemanddesign,ofInthenominalofofthelevelminimumthestructure,lifeovercontinuouslyreliablyprestressingreinforcementsuch,state.strengthforneededandprovidesserviceresultingtensileforatheelementprestressingbridges,twomorecountryinthoughforprestressedbeenhaswirewireMpatoinbarMPa,ofasuppliedisbridgestrandthreadedhighand7wiretowirehelicallywire,highofthecanprestressingreinforcement,oftheponentstheseprotectionCommonprincipallyforalsotendonsconstruction.ofwithinalwaysarealthoughgirderofthepositionedthesedesign。chosentendonsbridgesinsometimesconstructionflangesUnbondedwebsofthepositionedtendonsitsmasssurroundingtotensilegroutbondselement,thecapacitytheandprotectingstressing。ductsintois2005cementitious2005StructuresASCEtendonused. Inconstructionandunbondedbothstiffer. Instructural
公司管理相關(guān)推薦
鄂ICP備17016276號(hào)-1