Influence of variations in concrete material properties on the serviceability of.pdf

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1、EngineeringStructures33(2011)99–106ContentslistsavailableatScienceDirectEngineeringStructuresjournalhomepage:www.elsevier.com/locate/engstructInfluenceofvariationsinconcretematerialpropertiesontheserviceabilityofreinforcedandprestressedconcreteflexuralmembersT.Vinc

2、enta,∗,T.Ozbakkaloglua,R.Seracinob,W.KaggwaaaSchoolofCivil,EnvironmentalandMiningEngineering,TheUniversityofAdelaide,AustraliabDepartmentofCivil,ConstructionandEnvironmentalEngineering,NorthCarolinaStateUniversity,USAarticleinfoabstractArticlehistory:Theeffectofsta

3、tisticalvarianceassociatedwithconcretematerialpropertiesfordifferentconcreteReceived15October2009mixes,curingconditionsandagesarereportedinthispaper.TheconcretemixesthatwereanalysedReceivedinrevisedformarethecommonlyusedAustralianN32andN40mixes.Samplesofconcretewer

4、eextractedfrom17September2010concretetrucksonsitetoensurethattheconcretehadbeenexposedtobatchingandtransportprocessesAccepted17September2010associatedwithtypicalconcretesupply.Curingtimesfortestsamplesrangedfrom7to28days.ThetestAvailableonline30October2010frequency

5、wassignificantlyincreasedfortestingsamplesat7and28daysduetotheirimportanceascommonlyreferencedvaluesindesign.VariationsofrecordedmaterialpropertieswithrespecttotimeKeywords:andcuringconditionsareestablishedviaastatisticalanalysis.AMonteCarlosimulation,incorporating

6、theConcreteMaterialpropertiesstatisticalparametersofmaterialpropertiesasinput,wasappliedtoserviceabilitydeflectionpredictions.StatisticaldistributionAstatisticalpredictionofmemberdeflectionwasestablishedandanalyseddependingonthevariabilitySitecuringofmaterialproper

7、ties.ThispaperpresentsanalternativeapproachtopredictingdeflectionsbasedontheLaboratorycuringvariabilitythatoccurswithconcretematerialproperties.MonteCarlosimulation©2010ElsevierLtd.Allrightsreserved.Deflection1.Introductionpropertiesfordesignisasimpleandeffectivewa

8、yofconvertingaprobabilisticdistributionintoaneasilyapplicabledeterministicConcreteisastructuralmaterialthatexhibitsalargevariabilityvalue.However