全部和部分剪切连接的组合梁有限元模型

国际期刊导读

lation;Fictitiouscross2section

JournalofConstructionalSteelResearch,2007,63(8):1058-1065

CompressiveandFlexuralBehaviourofCFRP2RepairedConcrete2FilledSteelTubesAfterExposuretoFire

ZhongTao,Lin2HaiHanandLing2LingWang

在竖向和水平荷载作用下单层多跨

钢框架初步设计分析模型

AnalyticalModelforthePreliminaryDesignofaSingle2StoreyMulti2Bay

SteelFrameUnderHorizontalandVerticalLoads

J1G1YangandG1Y1Lee

摘　要:有很多复杂的分析方法可预测单层多跨钢

框架的几何非线性和钢构件的材料非线性影响。然而,用在钢结构设计上存在困难分析模型,型,、最大允许荷载,。通过二维的有限元分析验证了简化模型应用的可行性。

Abstract:Manycomplicatedanalyticalmethodshavebeenproposedtopredicttheeffectsofthegeometricnonlineari2tyofasingle2storymulti2baysteelframeandthematerialnonlinearityofitssteelmembers1However,somestructur2alengineershavedifficultyinunderstandingthecomplicatedmethodsandapplyingthemindesigningsteelstructures1Therefore,thisstudyhasbeenperformedtoprovideasim2plifiedanalyticalmodelthatisonlyapplicableintheprelimi2narydesignstage1Usingthesimplifiedanalyticalmodel,structuralengineerscaneasilypredictthestoreydrift,max2imumallowableloads,andbracingstiffnessofasingle2sto2reymulti2baysteelframe1Theapplicationfeasibilityofthesimplifiedmodelisverifiedbyperformingatwo2dimension2alfiniteelementanalysis1

摘　要:对单向CFRP修复火灾后混凝土填充钢管的轴心抗压和弯曲进行试验。试验采用圆形和方形两种试件来研究修复效果,试验结果显示CFRP加固有效提高了损伤柱的承载力。同时,由于CFRP的约束,柱的刚度也有提高,对于梁来讲,试,从试验,,建议采用其他合适的:Thispaperpresentstheresultsofaxialcompres2sionandbendingtestsoffire2damagedconcrete2filledsteeltubes(CFST)repairedusingunidirectionalcarbonfibrere2inforcedpolymer(CFRP)composites1BothcircularandsquarespecimensweretestedtoinvestigatetherepaireffectsofCFRPcompositesonthem1ThetestresultsshowedthattheCFRPjacketsenhancedtheload2bearingca2pacityofthestubcolumnseffectively1Enhancementofthecolumns’stiffnessduetotheCFRPjacketswasalsoob2served1However,forbeams,thetestresultsdemonstra2tedthattherepaireffectwasnotasgoodwhencomparedwiththatforstubcolumns1Fromthetestresults,itisrec2ommendedthatotherappropriaterepairmeasuresshouldbetakeninrepairingseverelyfire2damagedCFSTbeams,orthosememberssubjectedtocomparativelylargebendingmoments1

关键词:组合柱;组合梁;FRP;火后;残余强度;混凝土填充钢管;修复

Keywords:Compositecolumns;Compositebeams;FRP;Post2fire;Residualstrength;Concrete2filledsteeltubes;Repairing

JournalofConstructionalSteelResearch,2007,63(8):1116-1126

关键词:单层多跨钢框架;半刚性连接;双重角连接;层间位移;支撑系统

Keywords:Single2storeymulti2baysteelframe;Semi2rigidconnection;Doubleangleconnection;Storeydrift;Bracingsystem

JournalofConstructionalSteelResearch,2007,63(8):1091-1101

全部和部分剪切连接的组合梁有限元模型

FiniteElementModellingofCompositeBeams

withFullandPartialShearConnection

CFRP修复火灾后混凝土填充钢管

的抗压和弯曲性能

80

钢结构　2008年第1期第23卷总第103期　

F1D1Queiroz,P1C1G1S1VellascoandD1A1Nethercot

MotionandDamperCharacteristics

MuratDicleli,andAnshuMehta

摘　要:运用商业有限元软件ANSYS,对采用部分以及全部剪切连接的组合梁进行了评估。当简支梁受到集中荷载和不均匀分布荷载时,上述三维有限元模型能够模拟弯曲的简支梁行为,包括:荷载作用下的变形性能、在钢-混界面的纵向滑移、螺栓的剪力分布及破坏的模式。通过与试验或者与数值分析的比较,验证了模型的可靠性。随后采用修正的有限元模型,进行了广泛的参变量研究。同时也详细讨论了几个数值模型中有关收敛、荷载策略、计算效率的问题。所提模型的精确性和简洁性适合于预测或补充试验研究。

Abstract:Thepresentinvestigationfocusesontheevalua2tionoffullandpartialshearconnectionincompositebeamsusingthecommercialfiniteelement(FE)softwareANSTheproposedthree2dimensionalFEmodeliso2latetheoverallflexuralbehaviour2positebeamssuniformlydistributedloads1:deflectionbehaviour,longitudinalslipatthe2concreteinterface,distributionofstudshearforceandfailuremodes1Thereliabilityofthemodelisdemonstratedbycomparisonswithexperimentsandwithalternativenumericalanalyses1ThisisfollowedbyanextensiveparametricstudyusingthecalibratedFEmod2el1Thepaperalsodiscussesindetailseveralnumericalmodellingissuesrelatedtopotentialconvergenceproblems,loadingstrategiesandcomputerefficiency1Theaccuracyandsimplicityoftheproposedmodelmakeitsuitabletopredictand/orcomplementexperimentalinvestigations1

摘　要:根据地面运动强度和频率特性以及粘滞型阻尼器的参数,比较了具有或没有粘滞型阻尼器的人字型支撑的钢框架的抗震性能。对于单层和多层设有和没有粘滞型阻尼器的人字型支撑的钢框架,进行了包括小、中等、高强度各种频率特性的地面运动的非线性时间序列分析。以单层和多层带有粘滞型阻尼器的人字型支撑的钢框架的非线性时间序列分析为基础,,没,,,由于其维持了这种,极大提高了它的抗震性能。此外,小速率指数和大减幅比率的粘滞型阻尼器在提高带有人字型支撑的钢框架的抗震性能上更有效,然而,减幅比率大于50%的粘滞型阻尼器,在人字型支撑的钢框架的抗震性能上没有更多的改善。

Abstract:Thisstudyisaimedatcomparingtheseismicper2formanceofsteelchevronbracedframes(CBFs)withandwithoutviscousfluiddampers(VFDs)asafunctionoftheintensityandfrequencycharacteristicsofthegroundmotionandV …… 此处隐藏：3532字，全部文档内容请下载后查看。喜欢就下载吧 ……