基于地震塑性损伤的混凝土框架结构分析模型研究
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摘要
采用经典塑性和连续损伤模型,确定了塑性变形的演化法则,发展了一种基于抗震损伤的混凝土框架结构分析模型。运用两端具有塑性铰的梁模型模拟框架结构的梁柱。算例表明,该模型的损伤指数可以确定结构各单元和整体在地震时的性能及结构极限荷载,具有可靠的精度。
A plastic-damage model for reinforced concrete frames was developed based on the classical plastic model and the continuum damage model.The plastic-damage constitutive law was implemented into a beam model for framed structures,in which these were described by elastic beams and columns with two inelastic hinges at their ends.A damage index useful in evaluating the state of structural members and a meaningful global damage index for whole structure were introduced.The plastic-damage model,together with the member and global damage indices,were 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 model has reliable accuracy.
A plastic-damage model for reinforced concrete frames was developed based on the classical plastic model and the continuum damage model.The plastic-damage constitutive law was implemented into a beam model for framed structures,in which these were described by elastic beams and columns with two inelastic hinges at their ends.A damage index useful in evaluating the state of structural members and a meaningful global damage index for whole structure were introduced.The plastic-damage model,together with the member and global damage indices,were 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 model has reliable accuracy.
引文
[1]李杰,吴建营.混凝土弹塑性损伤本构模型研究[J].土木工程学报,2005,38(9):14-20.
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[3]Park Y J,Ang AH.Mechanistic Seismic Damage Model forReinforced Concrete[J].Struct Eng:ASCE,1985,111(4):722-739.
[4]Simo J C,Ju J W.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(1):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 J H,Boni B,Kleiber M.Finite Element Analysis of Two and Three-Dimensional Elasto-Plastic Frames-the Natural Approach[J].Comput Methods Appl Mech Eng,1982;35:221-248.
[9]Faleiro J,Barbat A H,Oller S.Plasticidade Danoem Po’rticos de Concreto Armado[C]∥46Congress Brasileiro do Concreto.Floriano’plis-Brazil:IBRACON,2004.
[10]Oller S,Barbat A H.Moment-Curvature Damage Model for Bridges Subjected to Seismic Loads[J].Compute Method Appl Mech Eng,2006,195:4490-4511.
[11]爱德华.L.威尔逊.结构静力分析——强调地震工程物理方法[M].北京:中国建筑工业出版社,2006.
[2]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.
[3]Park Y J,Ang AH.Mechanistic Seismic Damage Model forReinforced Concrete[J].Struct Eng:ASCE,1985,111(4):722-739.
[4]Simo J C,Ju J W.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(1):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 J H,Boni B,Kleiber M.Finite Element Analysis of Two and Three-Dimensional Elasto-Plastic Frames-the Natural Approach[J].Comput Methods Appl Mech Eng,1982;35:221-248.
[9]Faleiro J,Barbat A H,Oller S.Plasticidade Danoem Po’rticos de Concreto Armado[C]∥46Congress Brasileiro do Concreto.Floriano’plis-Brazil:IBRACON,2004.
[10]Oller S,Barbat A H.Moment-Curvature Damage Model for Bridges Subjected to Seismic Loads[J].Compute Method Appl Mech Eng,2006,195:4490-4511.
[11]爱德华.L.威尔逊.结构静力分析——强调地震工程物理方法[M].北京:中国建筑工业出版社,2006.
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