Residual strength of blast damaged reinforced concrete columns

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1、InternationalJournalofImpactEngineering37(2010)295–308ContentslistsavailableatScienceDirectInternationalJournalofImpactEngineeringjournalhomepage:www.elsevier.com/locate/ijimpengResidualstrengthofblastdamagedreinforcedconcretecolumnsXiaoliBao,BingLi*SchoolofCivilandEnvironmentalEngi

2、neering,NanyangTechnologicalUniversity,50NanyangAve,639798,SingaporearticleinfoabstractArticlehistory:Columnsarethekeyload-bearingelementsinframestructuresandexteriorcolumnsareprobablytheReceived1January2009mostvulnerablestructuralcomponentstoterroristattacks.Columnfailureisnormally

3、theprimarycauseReceivedinrevisedformofprogressivefailureinframestructures.Ahigh-fidelityphysics-basedcomputerprogram,LS-DYNAwas30March2009utilizedinthisstudytoprovidenumericalsimulationsofthedynamicresponsesandresidualaxialAccepted5April2009strengthofreinforcedconcretecolumnssubjecte

4、dtoshortstandoffblastconditions.ThefiniteelementAvailableonline23April2009(FE)modelisdiscussedindetailandverifiedthroughcorrelatedexperimentalstudies.Anextensiveparametricstudywascarriedoutonaseriesof12columnstoinvestigatetheeffectsoftransverseKeywords:reinforcementratio,axialloadrati

5、o,longitudinalreinforcementratio,andcolumnaspectratio.TheseReinforcedconcretecolumnBlastloadingsvariousparameterswereincorporatedintoaproposedformula,capableofestimatingtheresidualaxialNumericalsimulationcapacityratiobasedonthemid-heightdisplacementtoheightratios.Residualaxialcapaci

6、tyÓ2009ElsevierLtd.Allrightsreserved.1.Introductionexperimentalstudies.ThevalidatedFEmodelwasthenanalyzedundersimulatedblastloadsandinvestigationswerecarriedoutonColumnsarethekeyload-bearingelementsinframestructures.thedynamicresponsesandresidualaxialcapacitiesofthecolumns.Exteriorc

7、olumnsareprobablythemostvulnerablestructuralAnextensiveparametricstudywascarriedoutonaseriesof12componentstoterroristattacks.Columnfailureisnormallythecolumnstoinvestigatetheeffectofthetransversereinforcementprimarycauseofprogressivefailureinframestructures.However,ratio,long-termax

8、ialloadratio,longit