半刚性连接钢管混凝土框架剪力墙结构的动力特性分析
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摘要
将钢管混凝土框架剪力墙结构作为连续弹性无限自由度结构,建立自由振动方程,分析了半刚性连接对结构自振周期和频率的影响,推导出半刚性连接框剪结构自振周期系数的计算公式。使用通用有限元程序ANSYS进行结构的模态分析,有限元分析结果和公式计算结果吻合良好。结果表明,半刚性连接使得结构自振周期增大,半刚性连接对高阶振型自振周期的影响很小。提出了地震区钢管混凝土框剪结构体系的设计建议,可供工程设计人员参考使用。
Assuming that concrete filled steel stub frame-shear wall is a continuous elastic structure with infinite degree of freedom, free vibration equation is built. Furthermore, the effects of semi-rigid connection on natural periods or frequencies are studied. The formula for calculating the coefficient of natural periods is deduced. ANSYS is employed to determine the modal analysis. The results obtained from finite element analysis are consistent well with those obtained from formula. The results show that semi-rigid connections tend to increase the natural period. However, the effect on higher modes is negligible. The seismic design suggestions of the semi-rigid concrete filled steel stub frame-shear wall are proposed.
引文
[1]LuiEM.Dynamicanalysisandresponseofsemirigidframes[J].EngineeringStructure,1997,19(8):644~654.
    [2]刘小强,吴惠弼.半刚性连接钢框架位移和内力的计算[J].重庆建筑工程学院学报,1993,15(2):46~55.
    [3]包世华,方鄂华.高层建筑结构设计[M].北京:清华大学出版社,1990.61~62.
    [4]张相庭.高层建筑抗风抗震设计计算[M].上海:同济大学出版社,1997.144~146.
    [5]张胜民.基于有限元软件ANSYS7.0的结构分析[M].北京:清华大学出版社,2003.
    [6]刘坚,黄襄云,李开禧.基于超级单元的钢-混凝土混合结构动力特性及地震反应研究[J].地震工程与工程振动,2003,23(1):54~58.

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