高强溷凝土性能研究 - 应力 - 应变行为 - Stress-Strain Behavior of High-Strength Concrete

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1、ACISTRUCTURALJOURNALTECHNICALPAPERTitleno.98-S38Stress-StrainBehaviorofHigh-StrengthConcreteConfinedbyUltra-High-andNormal-StrengthTransverseReinforcementsbyLiBing,R.Park,andH.TanakaWhenhigh-strengthconcreteisusedforreinforcedconcretemem-reinforcementcaneffectivelyincreasetheduc

2、tilityofrein-berssubjectedtoseismicloading,itismoredifficulttoachieveforcedconcretecolumns.Ultra-high-strengthtransversere-ductilebehaviorofsuchmembersthanwhennormal-strengthcon-inforcementisespeciallyusedforcolumnswithhigh-creteisused.Inthispaper,anexperimentalstudyofanumberofs

3、trengthconcrete.quasi-staticaxialloadingtestsonhigh-strengthconcretespeci-mensconfinedbyvariousamountsoftransversereinforcementisdescribed.ThemainparameterswereconcretestrengthsrangingRESEARCHSIGNIFICANCEfrom35.2to82.5MPaandyieldstrengthofGrade430and1300Themostfundamentalissuein

4、predictingthebehavioroftransversereinforcement.Astress-strainrelationshipforconfinedreinforcedconcretemembersisthestress-strainbehaviorofhigh-strengthconcreteisproposedthatisfoundtogivereasonablytheconstituentmaterials.Concreteisusedtoresistcompres-goodpredictionoftheexperimenta

5、lbehaviorofcircularandsionanditsbehaviorincompressionisimportanttothede-squarespecimenswithhigh-strengthconcreteconfinedbyeithersigner.Ifthebehaviorofconcretesubjectedtouniaxialnormal-orultra-high-yield-strengthwithvariousconfigurations.compressionisknown,theflexuralbehaviorofre

6、inforcedAnempiricalformulafortheultimatelongitudinalstrainofcon-concretecanbeestimated.Theconfinementsteelrequire-finedhigh-strengthconcretecorrespondingtothefirsthooporspi-mentsfornormal-strengthconcretearereasonablywelles-ralfractureisalsoproposed.tablishedincurrentbuildingcod

7、es.Inrecentyears,thepossibleuseofhigh-strengthconcreteforbuildingscon-Keywords:column;confinementreinforcement;high-strengthconcrete;structedusingreinforcedconcretehasbeenconsidered.Re-strains;stresses;tests.searchfindingsforhigh-strengthconcrete,however,arerelativelyscarceinthe

8、literature.INTRODUCTIONReinforcedconcretebuildi