地震载荷作用下钢混梁柱节点多重屈服面模型
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摘要
针对地震载荷作用下混凝土梁柱节点结构,提出了一个多屈服面强度模型。通过详细定义加载—卸载—再加载过程,该强度模型可以处理弹性变形、非相关流动、硬化和混凝土损伤。数值计算表明,该模型能够很好地模拟地震载荷作用下混凝土梁柱节点的变形行为。
In light of concrete beam-column joint structure under seismic load,the paper puts forward the multiple yield surface model.Through specifically identifying the loading-unloading-reloading process,the strength model can deal with elastic deformation,non-relevant flow,hardening and concrete damage.The numerical calculation shows that the model can better simulate the concrete beam-column joint deformation performance under the seismic load.
In light of concrete beam-column joint structure under seismic load,the paper puts forward the multiple yield surface model.Through specifically identifying the loading-unloading-reloading process,the strength model can deal with elastic deformation,non-relevant flow,hardening and concrete damage.The numerical calculation shows that the model can better simulate the concrete beam-column joint deformation performance under the seismic load.
引文
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[2]Kotsovos MD.Mathematical description of the strength proper-ties of concrete under generalized stress[J].Magazine of Con-crete Research,1979,31(108):151-158.
[3]Ottosen NS.A failure criterion for concrete[J].ASCE Journal ofEngineering Mechanics,1977,103(EM4):527-535.
[4]Willam K J,Warnker EP.Constitutive models for the triaxial be-havior of concrete[J].IABSE Proceeding,1975(19):1-31.
[5]Hsieh S S,Ting EC,Chen WF.A plasticity-fracture model forconcrete[J].Int J Soids Struct,1982,18(3):181-197.
[6]Pietruszczak S,Jiang J,Mirza FA.An elasto-plastic constitutivemodel for concrete[J].Int.J.Solids and Structures,1988,24(7):705-722.
[7]Han DJ,Chen WF.A nonuniform hardening plasticity model forconcrete materials[J].Mech Mat,1985(4):283-302.
[8]Yu MH,Yang SY,Fan SC.Unified elasto-plastic associated andnon-associated constitutive model and its engineering applica-tions[J].Computers and Structures,1999(71):627-636.
[9]Owen DRJ,Hinton E.Finite element in plasticity:theory and prac-tice[M].Swansea:Pineridge Press,1980.
[10]Simo JC,Ju JW.Strain-and stress-based continuum damagemodels-I:Formulation[J].Int J Solids Struct,1987,23(7):495-521.
[11]Mazars J,Pijaudier-Cabot.Continuum damage theory-applica-tion to concrete[J].Journal of Engineering Mechanics,1989,115(2):345-365.
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