框-剪结构剪力墙可中断高度的分析研究
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摘要
基于钢筋砼杆件截面的轴力-弯矩-曲率关系,建立了考虑杆件P-Δ效应和剪切变形且能分析结构极限状态的非线性有限元法。将剪力墙当作特别杆单元,对不同高度、配筋、轴压比和刚度特征值的中断剪力墙的框-剪结构进行了静力弹塑性分析。设定可中断剪力墙高度的条件。计算表明:上部剪力墙中断的相对高度值的决定因素为结构顶部的位移;相对高度值与配筋和轴压比无关;与结构高度关系较小;随着刚度特征值的增加,相对高度值随之增加,并给出了两者之间的表达式。
Based on the relationship among axial force-bending moment-curvature of reinforced concrete member section, the nonlinear finite element method considering P-Δ effect and shear deformation was established which was able to analyze the ultimate state. Regarding the shear wall as special beam elements, the frame-shear wall structures with shear wall interrupted at different heights, with different reinforcements, axial compressive ratios and rigidity characteristics were analyzed. The conditions of interruptable shear wall height are proposed. Calculation results indicate that the decisive factor influencing interruptable relative height above the shear wall is the top displacement; the relative height is not related to reinforcements and axial compressive ratios, and slightly related to structure height. With the increase of the rigidity characteristic, the relative height increases. The equation between them is proposed.
Based on the relationship among axial force-bending moment-curvature of reinforced concrete member section, the nonlinear finite element method considering P-Δ effect and shear deformation was established which was able to analyze the ultimate state. Regarding the shear wall as special beam elements, the frame-shear wall structures with shear wall interrupted at different heights, with different reinforcements, axial compressive ratios and rigidity characteristics were analyzed. The conditions of interruptable shear wall height are proposed. Calculation results indicate that the decisive factor influencing interruptable relative height above the shear wall is the top displacement; the relative height is not related to reinforcements and axial compressive ratios, and slightly related to structure height. With the increase of the rigidity characteristic, the relative height increases. The equation between them is proposed.
引文
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[10]汪梦甫,周锡元.钢筋混凝土框架-剪力墙结构非线性地震反应实用分析方法的研究[J].土木工程学报,2002,35(6):32~38.Wang Mengfu,Zhou Xiyuan.A practical method for nonlinear seismic response of RC frame wall structure[J].China Civil Eng.Journal,2002,35(6):32~38.(in Chinese)
[11]侯爽,欧进萍.结构PUSHOVER分析的侧向力分布及高阶振型影响[J].地震工程与工程振动,2004,24(3):89~97.Hou Shuang,Ou Jinping.A study of load pattern selection of pushover analysis and influence of higher modes[J].Earthquake Eng.and Eng.Vibration,2004,24(3):89~97.(in Chinese)
[2]Wang Quanfeng,Wang Lingyun,Liu Qiansheng.Seismic response of stepped frame-shear wall structures by using numerical method[J].Int.J.,Computer Method in Applied Mechanics&Engineering,1999,173(1):31~39.
[3]Wang Quanfeng,Wang Lingyun,Liu Qiansheng.Effect of shear wall height on earthquake response[J].Int.J.,Engineering Structures,2001,23(4):376~384.
[4]Moehle J P.Seismic analysis of R/C frame wall structure[J].J.of Struct.Eng.,1984,110(10):2619~2634.
[5]Moehle J P.Seismic analysis method for irregular buildings[J].J.of Struct.Eng.,1986,11(1):35~52.
[6]王全凤,张波.含断层剪力墙框-剪结构的楼层地震剪力[J].华侨大学学报,2001,22(4):389~393.Wang Quanfeng,Zhang Bo.Seismic shear of floor in a frame-shear structure containing faulted shear wall[J].Journal of Huaqiao University,2001,22(4):389~393.(in Chinese)
[7]王全凤,张波.框-剪结构剪力墙中断和楼层刚度比[J].建筑结构,2003,33(5):39~48.Wang Quanfeng,Zhang Bo.Shear wall’s interruption of frame-shear wall structures and storey stiffness ratio[J].Building Structure,2003,33(5):39~48.(in Chinese)
[8]吕西林,金国芳.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.Lu Xilin,Jin Guofang.Theory and application of nonlinear finite element for RC structures[M].Shanghai:Tongji University Press,1997.(in Chinese)
[9]蒋通.高层框-剪结构空间协同弹塑性地震反应分析[J].地震工程与工程振动,1998,18(2):69~78.Jiang Tong.Spatially cooperating elasto-plastic seismic response analysis of frame-wall structures[J].Earthquake Eng.and Eng.Vibration,1998,18(2):69~78.(in Chinese)
[10]汪梦甫,周锡元.钢筋混凝土框架-剪力墙结构非线性地震反应实用分析方法的研究[J].土木工程学报,2002,35(6):32~38.Wang Mengfu,Zhou Xiyuan.A practical method for nonlinear seismic response of RC frame wall structure[J].China Civil Eng.Journal,2002,35(6):32~38.(in Chinese)
[11]侯爽,欧进萍.结构PUSHOVER分析的侧向力分布及高阶振型影响[J].地震工程与工程振动,2004,24(3):89~97.Hou Shuang,Ou Jinping.A study of load pattern selection of pushover analysis and influence of higher modes[J].Earthquake Eng.and Eng.Vibration,2004,24(3):89~97.(in Chinese)
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