联肢剪力墙的弹塑性有限元分析
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摘要
联肢剪力墙在地震作用下的非线性分析具有重要的研究意义,根据高层建筑结构联肢剪力墙的特点,将两元件墙单元与多弹簧连梁单元组合,对钢筋混凝土联肢剪力墙作弹塑性有限元分析。采用应变硬化的弹塑性应力应变关系描述钢筋,引入约束影响系数以考虑连梁箍筋对混凝土应力应变关系的影响,提出一种可以反映连梁弹塑性剪切变形的计算模型。验证了同济大学一组联肢剪力墙试验,计算结果与试验结果相符证明了模型的有效性。但滞回模型的骨架曲线有待进一步改进,以考虑下降段的影响。
It has important research meanings to analyze the nonlinear response of coupled walls subjected to earthquake.In this paper,two spring model for reinforced concrete shear walls and multi-spring model for coupling beams are presented.The combination of these two elements is able to simulate the continuity between the walls and the coupling beams completely.And in the element formulation,the elasto-platic constitutive model for steel bar and concrete are adopted.A model capable of simulating the deformation as shearing in coupling beam element has been put forward for analysis.And a test of reinforced coupled shear walls at the Tongji University is reviewed.The analysis model proves to be effective with the accordance between results of computation and experiment.However,the envelop curve of hysteresis model should be improved to considering the effect of descending part.
It has important research meanings to analyze the nonlinear response of coupled walls subjected to earthquake.In this paper,two spring model for reinforced concrete shear walls and multi-spring model for coupling beams are presented.The combination of these two elements is able to simulate the continuity between the walls and the coupling beams completely.And in the element formulation,the elasto-platic constitutive model for steel bar and concrete are adopted.A model capable of simulating the deformation as shearing in coupling beam element has been put forward for analysis.And a test of reinforced coupled shear walls at the Tongji University is reviewed.The analysis model proves to be effective with the accordance between results of computation and experiment.However,the envelop curve of hysteresis model should be improved to considering the effect of descending part.
引文
[1]T Paulay.Coupling Beams of Reinforced Concrete Shear Walls[J].Journal of the Structural Division,ASCE,1971,97(ST3):843-862.
[2]Kent A Harries,Bingnian Gong,Bahram M Shahrooz.Behaviorand Design of Reinforced Concrete,Steel and Steel-ConcreteCoupling Beams[J].Earthquake Spectra,2000,16(4):775-799.
[3]陈勤.钢筋混凝土双肢剪力墙静力弹塑性分析[D].北京:清华大学,2002.
[4]Kang-Ning Li.Multi-spring model for 3-dimensional analysisof RC members[J].Structural Engineering and Mechanics,1992,1(1):17-30.
[5]姬守中,江欢成.考虑轴向变形、双轴弯曲耦合效应的钢筋混凝土柱的弹塑性分析[J].地震工程与工程振动,2002,22(4):74-80.
[6]姬守中,江欢成,吕西林.双轴反复荷载作用下钢筋混凝土空间框架结构滞回全过程分析[J].力学季刊,2002,23(4):455-462.
[7]Shing-Sham Lai,George TWill,Shunsuke Otani.Model for ine-lastic biaxial bending of concrete members[J].Journal of Struc-tural Engineering Mechanics,ASCE,1984,110(11):2563-2584.
[8]朱杰江.混凝土结构非线性分析研究以及实例工程应用[D].上海:同济大学,2005.
[9]Li K-N,Otani S,Aoyama H.Nonlinear Earthquake Response of Re-inforced Concrete Space Frames with Varying Axial Force[J].Tansactions,Japan Concrete Inst.,1989,11:247-254.
[10]Paulay T,Priestley MJN.Seismic Design of Reinforced Concreteand Masonry Buildings[M].New York:Wiley,1992:135-145.
[11]吕西林,金国芳,吴晓涵.钢筋混凝土结构非线性有限元理论与应用[M].上海:同济大学出版社,1997.
[12]司林军,李国强,孙飞飞.钢筋混凝土剪力墙二元件模型的有效性研究[J].结构工程师,2008,24(4):19-24.
[13]陈云涛,吕西林.联肢剪力墙抗震性能研究—试验和理论分析[J].建筑结构学报,2003,24(4):25-34.
[2]Kent A Harries,Bingnian Gong,Bahram M Shahrooz.Behaviorand Design of Reinforced Concrete,Steel and Steel-ConcreteCoupling Beams[J].Earthquake Spectra,2000,16(4):775-799.
[3]陈勤.钢筋混凝土双肢剪力墙静力弹塑性分析[D].北京:清华大学,2002.
[4]Kang-Ning Li.Multi-spring model for 3-dimensional analysisof RC members[J].Structural Engineering and Mechanics,1992,1(1):17-30.
[5]姬守中,江欢成.考虑轴向变形、双轴弯曲耦合效应的钢筋混凝土柱的弹塑性分析[J].地震工程与工程振动,2002,22(4):74-80.
[6]姬守中,江欢成,吕西林.双轴反复荷载作用下钢筋混凝土空间框架结构滞回全过程分析[J].力学季刊,2002,23(4):455-462.
[7]Shing-Sham Lai,George TWill,Shunsuke Otani.Model for ine-lastic biaxial bending of concrete members[J].Journal of Struc-tural Engineering Mechanics,ASCE,1984,110(11):2563-2584.
[8]朱杰江.混凝土结构非线性分析研究以及实例工程应用[D].上海:同济大学,2005.
[9]Li K-N,Otani S,Aoyama H.Nonlinear Earthquake Response of Re-inforced Concrete Space Frames with Varying Axial Force[J].Tansactions,Japan Concrete Inst.,1989,11:247-254.
[10]Paulay T,Priestley MJN.Seismic Design of Reinforced Concreteand Masonry Buildings[M].New York:Wiley,1992:135-145.
[11]吕西林,金国芳,吴晓涵.钢筋混凝土结构非线性有限元理论与应用[M].上海:同济大学出版社,1997.
[12]司林军,李国强,孙飞飞.钢筋混凝土剪力墙二元件模型的有效性研究[J].结构工程师,2008,24(4):19-24.
[13]陈云涛,吕西林.联肢剪力墙抗震性能研究—试验和理论分析[J].建筑结构学报,2003,24(4):25-34.
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