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1、.外文文献：MaterialsandStructures© RILEM 201010.1617/s11527-010-9700-yOriginalArticleImpactofcrackwidthonbond:confinedandunconfinedrebarDavid W. Law1 ,Denglei Tang2,Thomas K. C. Molyneaux3andRebecca Gravina3(1) SchooloftheBuiltEnvironment,HeriotWattUniversity,Edinburgh
2、,EH144AS,UK(2) VicRoads,Melbourne,VIC,AustraliaSchoolofCivil,EnvironmentalandChemicalEngineering,RMIT.专业.(3) University,Melbourne,VIC,3000,AustraliaDavid W. LawEmail:D.W.Lawhw.ac.ukReceived:14 January 2010 Accepted:14 December 2010 Publishedonline:23 December 20
3、10AbstractThispaperreportstheresultsofaresearchprojectcomparingtheeffectofsurfacecrackwidthanddegreeofcorrosiononthebondstrengthofconfinedandunconfineddeformed12and16 mmmildsteelreinforcingbars.Thecorrosionwasinducedbychloridecontaminationoftheconcreteandanapplied
4、DCcurrent.Theprincipalparametersinvestigatedwereconfinementofthereinforcement,thecoverdepth,bardiameter,degreeofcorrosionandthesurfacecrackwidth.Theresultsindicatedthatpotentialrelationshipbetweenthecrackwidthandthebondstrength.Theresultsalsoshowedanincreaseinbond
5、strengthatthepoint.专业.whereinitialsurfacecrackingwasobservedforbarswithconfiningstirrups.Nosuchincreasewasobservedwithunconfinedspecimens.Keywords: bond ;corrosion ; rebar ; cover ; crackwidth ; concrete1 Introduction.专业.Thecorrosionofsteelreinforcementisamajorca
6、useofthedeteriorationofreinforcedconcretestructuresthroughouttheworld.Inuncorrodedstructuresthebondbetweenthesteelreinforcementandtheconcreteensuresthatreinforcedconcreteactsinacompositemanner.However,whencorrosionofthesteeloccursthiscompositeperformanceisadversel
7、yaffected.Thisisduetotheformationofcorrosionproductsonthesteelsurface,whichaffectthebondbetweenthesteelandtheconcrete.Thedeteriorationofreinforcedconcreteischaracterizedbyageneralorlocalizedlossofsectiononthereinforcingbarsandtheformationofexpansivecorrosionproduc
8、ts.Thisdeteriorationcanaffectstructuresinanumberofways;theproductionofexpansiveproductscreatestensilestresseswithintheconcrete,whichcanresultincrackinga
