全部和部分剪切连接的组合梁有限元模型

lation;Fictitious cross2s ectionJ ournal of Cons tructional Steel Res earch,2007,63(8): 1058-1065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Analytical Model f or t he PreliminaryDesign of a Single2S t orey Multi2BayS t eel Fra me Under Horizontal and Vertical L oadsJ1G1Ya ng a nd G1Y1Lee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,一些结构工程师在理解这些复杂的方法以及应用在钢结构设计上存在困难。

因此,提供了简化的分析模型,用于初步设计阶段。

采用简化的分析模型,结构工程师能够容易地预测层间位移、最大允许荷载,单层多跨钢框架支撑的刚度。

通过二维的有限元分析验证了简化模型应用的可行性。

Abstract:Many complicated analytical met hods have been prop os ed t o pre dict t he eff ects of t he geometric nonlineari2 t y of a single2st ory multi2bay s teel f rame and t he material nonlinearit y of its s teel me mbers1How e ver,s ome struct ur2 al engineers have difficult y in unders tanding t he complicate d met hods and applying t he m in designing s teel s truct ures1 Theref ore,t his s t udy has been perf orme d t o p rovide a sim2 plifie d analytical model t hat is only applicable in t he p relimi2 nary design stage1Using t he simplifie d analytical model, struct ural engineers can easily pre dict t he st orey drif t,max2 imum allowable loads,and bracing s tiff ness of a single2s t o2 rey multi2bay s teel f rame1The application f easibilit y of t he simplifie d model is verifie d by p erf orming a t w o2dimension2 al finite ele ment analysis1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K eyw ords:Single2s t orey multi2bay s teel f rame;Se mi2rigid connection;Double angle connection;St orey drif t;Bracing s ys te mJ ournal of Cons tructional Steel Res earch,2007,63(8): 1091-1101CFRP修复火灾后混凝土填充钢管的抗压和弯曲性能Comp res sive and Fle xural Behaviourof CFRP2Rep aired Concret e2FilledS t eel Tubes Af t er Exp os ure t o FireZho ng Tao,Lin2Hai Ha n a nd Ling2Ling Wa ng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。

然而,对于梁来讲,试验结果显示修复效果没有柱的修复效果好,从试验结果来看,对于受到火灾严重损伤的混凝土填充钢管梁或承受较大弯矩的构件,建议采用其他合适的修复方法。

Abstract:This pap er p res ents t he res ults of axial compres2 sion and bending tes ts of fire2damage d concrete2filled s teel t ubes(CFS T)repaired using unidirectional carbon fibre re2 inf orce d p olymer(CFRP)comp osites1Bot h circular and s quare specimens w ere tes ted t o inves tigat e t he repair eff ects of CFRP comp osites on t he m1The tes t res ults s how ed t hat t he CFRP jackets enhance d t he load2bearing ca2 pacit y of t he s t ub columns eff ectively1Enhance ment of t he columns’s tiff ness due t o t he CFRP jackets was als o ob2 s erved1How e ver,f or beams,t he tes t res ults de mons tra2 ted t hat t he repair eff ect was not as good w hen compare d wit h t hat f or s t ub columns1From t he tes t res ults,it is rec2 ommende d t hat ot her app rop riate repair meas ures s hould be taken in repairing s e verely fire2damaged CFS T beams,or t hos e me mbers s ubjected t o comparatively large bending moments1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K eyw ords:Comp osite columns;Comp osite beams;FRP; Pos t2fire;Residual strengt h;Concrete2filled s teel t ubes; RepairingJ ournal of Cons tructional Steel Res earch,2007,63(8): 1116-1126全部和部分剪切连接的组合梁有限元模型Finit e Ele ment Modelling of Co mp osit e Beams wit h Full and Partial S hear Connection国际期刊导读F1D1Queiroz,P1C1G1S1Vella sco a nd D1A1Nethercot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:The p res ent inves tigation f ocus es on t he e valua2 tion of f ull and partial s hear connection in comp osite beams using t he commercial finite ele ment(FE)s of t ware ANS YS1 The p rop ose d t hree2dimensional FE model is able t o simu2 late t he overall fle xural behaviour of simply s upp orted com2 p osite beams s ubjecte d t o eit her concentrated or unif ormly distributed loads1This covers:load deflection behaviour, longit udinal slip at t he steel2concrete interf ace,dis tribution of s t ud s hear f orce and failure modes1The reliabilit y of t he model is de mons trated by comparis ons wit h e xperiments and wit h alternative numerical analyses1This is f ollow ed by an e xtensive parametric st udy using t he calibrate d FE mod2 el1The pap er als o discuss es in detail s e veral numerical modelling iss ues relate d t o p otential convergence p roble ms, loading s trategies and comp uter efficiency1The accuracy and simplicit y of t he p rop os e d model make it s uitable t o pre dict and/or comple ment e xperimental inves tigations1关键词:组合梁;有限元方法;材料非线性;剪力连接;参数方析;ANS YSK eyw ords:Comp osite beams;Finite ele ment met hod;Ma2 terial nonlinearit y;S hear connection;Parametric analysis; ANS YSJ ournal of Cons tructional Steel Res earch,2007,63(4): 505-521以地面运动和阻尼特性为函数研究带有或不带粘滞型阻尼器的人字型支撑钢框架的抗震性能S eis mic Perf ormance of Che vron Brace dS t eel Fra mes wit h and Wit hout Vis cousFluid Da mp ers As a Function of GroundMotion and Da mp er Charact eris ticsMura t Dicleli,a nd Anshu Meht a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。