资源描述：
《Influence of free water on the quasi-static and dynamic strength of concrete in confined compression tests.pdf》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、CementandConcreteResearch40(2010)321–333ContentslistsavailableatScienceDirectCementandConcreteResearchjournalhomepage:http://ees.elsevier.com/CEMCON/default.aspInfluenceoffreewateronthequasi-staticanddynamicstrengthofconcreteinconfinedcompressiontestsa,⁎,K.SafabbP.Forquin,G.GaryaLabor
2、atoiredePhysiqueetdeMécaniquedesmatériaux,UniversitédeMetz,57045Metz,FrancebLaboratoiredeMécaniquedesSolides,EcolePolytechnique,91128Palaiseau,FrancearticleinfoabstractArticlehistory:ThebehaviourofconcreteunderhighpressureanddynamicloadingsisexperimentallyinvestigatedintheReceived14
3、October2008presentpaper.Thespecimenisconfinedinacylindricalelasticsteelringthatinsuresaquasi-uniaxialstrainAccepted25September2009stateofloading.Itissubjectedtostaticanddynamic(withstrainratesintherangefrom1e−6/sto200/s)axialcompressiveloadings.Transversegaugesgluedonthelateralsurfac
4、eoftheringallowfortheKeywords:measurementoftheconfiningpressuresothatthevolumetricandthedeviatoricresponseofthespecimenCompressivestrength(C)canbecomputed.Athighorintermediatestrainrates,watersaturatedanddriedspecimensshowstronglyPermeability(C)Strain-rateeffect(C)differentresults:i.
5、e.acontinuousincreaseofstrengthwithpressureindriedspecimensandaquasinilMicroconcrete(E)strengthenhancementinwater-saturatedspecimens.Thisdifferenceisnotobservedwithquasi-staticHopkinsonpressurebarloadings.Asexplainedthroughabasicporomechanicsanalysis,thisdissimilarityismainlyattribu
6、tedtoanincreaseofporepressureinsidethesaturatedconcreteduringfast(quasi-staticordynamic)experiments.©2009ElsevierLtd.Allrightsreserved.1.Introductionpressureonthedeviatoricstress,takenastheaxialstressminusthelateralpressureappliedbythefluid,isthenobserved.ThetestshaveThedeviatoricstr
7、ength(thedeviatoricstressbeingdefinedastheshowntheductilityofconcretesunderstrongconfinementandthedifferencebetweenthemaximalandminimalprinciplestresses)andtheincreaseofthestrengthwithpressure[3,20,22,24,25,34].Recently,compactionlawofconcreteunderhydrostaticpressureuptoonetriaxialtes
8、tswithconfiningpress
