RC框架结构地震塑性损伤分析
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摘要
基于经典塑性模型与连续损伤模型,根据广义应力空间塑性力学确定了塑性变形的演化法则,文中发展了一种地震塑性损伤分析方法。用来进行混凝土框架结构的抗震分析,将塑性损伤的本构关系运用于两端具有塑性铰的梁模型,模拟框架结构的梁柱。同时该方法的损伤指数可以确定结构各单元和整体的地震时性能,确定结构极限荷载,算例表明该方法具有可靠的精度。
A seismic plastic-damage analyses method for reinforced concrete frames is developed in this article,based on the classical plastic model and the continuum damage model.The Plastic-damage constitutive law is implemented into a beam model for framed structures,in which these are described by elastic beams and columns with two inelastic hinges at their ends.A damage index is useful in evaluating the state of structural members and a meaningful global damage index for whole structure are introduced.The method together with the member and global damage indices,are adequate for the computation of the limit load of reinforced concrete frames subjected to seismic actions.Examples of applications of the methodology to the non-linear analysis of reinforced concrete framed structures were finally given.The result indicates that the method has reliable accuracy.
A seismic plastic-damage analyses method for reinforced concrete frames is developed in this article,based on the classical plastic model and the continuum damage model.The Plastic-damage constitutive law is implemented into a beam model for framed structures,in which these are described by elastic beams and columns with two inelastic hinges at their ends.A damage index is useful in evaluating the state of structural members and a meaningful global damage index for whole structure are introduced.The method together with the member and global damage indices,are adequate for the computation of the limit load of reinforced concrete frames subjected to seismic actions.Examples of applications of the methodology to the non-linear analysis of reinforced concrete framed structures were finally given.The result indicates that the method has reliable accuracy.
引文
[1]王振宇,刘晶波,建筑结构地震损伤评估的研究进展[J].世界地震工程,2001,17(3):43-48.WANG Zhenyu,LIU Jingbo.The advance of studies on seismic damage assessment of building structures[J].World Earthquake Engineering,2001,17(3):43-48.
[2]李杰,任晓丹.混凝土静力与动力损伤本构模型研究进展评述[J].力学进展,2010,40(3):284-297.LI jie,REN Xiaodan.A review on the constiuttive model for static and dynamic damage of concrete[J].Advances in Mechanics,2010,40(3):284-297.
[3]Park YJ,Ang AH.Mechanistic seismic damage model for reinforced concrete[J].Struct Eng:ASCE 1985,111(4):722-739.
[4]Simo JC,Ju JW.Stress and strain based continuum damage models-I.Formulation[J].Solid Struct,1987,23:821-840.
[5]Luccioni B,Oller S,Danesi R.Coupled plastic-damage model[J].Compute Method Appl Mech Eng,1996,129:81-89.
[6]方运红,李青宁,张守军.肢剪力墙损伤累积力学模型[J].世界地震工程,2009,(01):54-58.FANG Hongyun,LI Qingning,ZHANG Shoujun.State-of-the-art of direct displacement-based seismic design theory for structures[J].WorldEarthquake Engineering,2009,(01):54-58.
[7]Cipolina A,Lo'pez Inojosa A,Flo'rez-Lo'pez J.A simplified damage mechanics approach to non-linear analysis of frames[J].Comput Struct,1995,54(6):1113-1126.
[8]Argyris JH,Boni B,Kleiber M.Finite element analysis of two and three-dimensional elasto-plastic frames-the natural approach[J].Comput Meth-ods Appl Mech Eng,1982,35:221-48.
[9]Faleiro J,Barbat AH,Oller S.Plasticidade Danoem Po'rticos de Concreto Armado.In:46_Congress Brasileiro do Concreto.Floriano'plis-Brazil:IBRACON;2004.
[10]Oller S,Barbat AH.Moment-curvature damage model for bridges subjected to seismic loads[J].Compute Method Appl Mech Eng,2006,195:4490-511.
[2]李杰,任晓丹.混凝土静力与动力损伤本构模型研究进展评述[J].力学进展,2010,40(3):284-297.LI jie,REN Xiaodan.A review on the constiuttive model for static and dynamic damage of concrete[J].Advances in Mechanics,2010,40(3):284-297.
[3]Park YJ,Ang AH.Mechanistic seismic damage model for reinforced concrete[J].Struct Eng:ASCE 1985,111(4):722-739.
[4]Simo JC,Ju JW.Stress and strain based continuum damage models-I.Formulation[J].Solid Struct,1987,23:821-840.
[5]Luccioni B,Oller S,Danesi R.Coupled plastic-damage model[J].Compute Method Appl Mech Eng,1996,129:81-89.
[6]方运红,李青宁,张守军.肢剪力墙损伤累积力学模型[J].世界地震工程,2009,(01):54-58.FANG Hongyun,LI Qingning,ZHANG Shoujun.State-of-the-art of direct displacement-based seismic design theory for structures[J].WorldEarthquake Engineering,2009,(01):54-58.
[7]Cipolina A,Lo'pez Inojosa A,Flo'rez-Lo'pez J.A simplified damage mechanics approach to non-linear analysis of frames[J].Comput Struct,1995,54(6):1113-1126.
[8]Argyris JH,Boni B,Kleiber M.Finite element analysis of two and three-dimensional elasto-plastic frames-the natural approach[J].Comput Meth-ods Appl Mech Eng,1982,35:221-48.
[9]Faleiro J,Barbat AH,Oller S.Plasticidade Danoem Po'rticos de Concreto Armado.In:46_Congress Brasileiro do Concreto.Floriano'plis-Brazil:IBRACON;2004.
[10]Oller S,Barbat AH.Moment-curvature damage model for bridges subjected to seismic loads[J].Compute Method Appl Mech Eng,2006,195:4490-511.
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