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ID:40058313
大小:116.42 KB
页数:8页
时间:2019-07-18
《Design Expression for the In-Plane Shear Strength of rcm》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、DesignExpressionfortheIn-PlaneShearStrengthofReinforcedConcreteMasonry12K.C.VoonandJ.M.Ingham,M.ASCEAbstract:AspectsrelatingtocodiÞcationofthein-planeshearstrengthofconcretemasonrywallswhensubjectedtoseismicloadingarepresentedinthispaper.Particularemphasisisplacedonamode
2、lthatiscapableofrepresentingtheinteractionbetweenßexuralductilityandmasonryshearstrengthtoaccountforthereductioninshearstrengthasductilitylevelincreases.Thesimplemethodproposedhereallowsthestrengthenhancementprovidedbyaxialcompressionloadtobeseparatedfromthemasonrycompon
3、entofshearstrengthandisconsideredtoresultfromstrutaction.Inaddition,minormodiÞcationsaremadetofacilitateadoptionofthemethodintheupdatedversionoftheNewZealandmasonrydesignstandard,NZS4230:2004.PredictionofshearstrengthfromNZS4230:2004andalternativemethodsarecomparedwithre
4、sultsfromawiderangeofmasonrywallstestsfailinginshear.ItwasestablishedthattheshearequationintheformerversionoftheNewZealandmasonrystandardNZS4230:1990wasoverlyconservativeinitspredictionofmasonryshearstrength.ThecurrentNationalEarthquakeHazardsReductionProgramNEHRPshe
5、arexpressionwasfoundtobecommendable,butitdoesnotaddressmasonryshearstrengthwithinplastichingeregions,thereforelimitingitsusewhendesigningmasonrystructuresinseismicregions.Finally,thenewshearequationimplementedinNZS4230:2004wasfoundtoprovidesigniÞcantlyimprovedshearstreng
6、thpredictionwithrespecttoitspredecessor,withaccuracyclosetothatresultedfromNEHRP.DOI:10.1061/ASCE0733-94452007133:5706CEDatabasesubjectheadings:Axialloads;Ductility;Masonry;Reinforcement;Shearstrength;Concrete,reinforced.Introductionßexuralyielding,usuallycharacter
7、izedbyrapidstrengthdegrada-tionsoonafterthemaximumstrengthisreached.Theseexperi-ReinforcedmasonrystructuresaretypicallyÒbox-likeÓwithshearmentalstudiessuccessfullydemonstratedthattheshearresistancewallpanelspotentiallysubjectedtosimultaneousgravityandofreinforcedmasonryw
8、allpanelscomesfrommechanismssimi-horizontalloads,resultinginoverturningmomentsduringseismiclartothoseob
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