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轴压比对方钢管混凝土框架延性影响的有限元分析
引用本文:王铁成,卢明奇.轴压比对方钢管混凝土框架延性影响的有限元分析[J].吉林大学学报(工学版),2005,35(1):70-75.
作者姓名:王铁成  卢明奇
作者单位:天津大学,建筑工程学院,天津,300072
摘    要:为了研究框架柱的轴压比对方钢管混凝土框架延性的影响,建立了方钢管混凝土框架结构的非线性有限元分析模型。将该模型的计算结果与方钢管混凝土框架结构在低周反复荷载作用下试验所得的滞回曲线进行对比,可见模型的计算结果较为精确,可以应用于框架的结构分析中。利用此模型对在低周反复荷载作用下的、轴压比不同的方钢管混凝土框架结构进行了有限元分析,并对其滞回曲线和位移延性系数进行了对比分析。结果表明:随着边柱和中柱轴压比的增大,框架延性降低。

关 键 词:工程力学  轴压比  方钢管混凝土  框架  延性  有限元
文章编号:1671-5497(2005)01-0070-06
修稿时间:2004年5月14日

Finite element analysis of effect of axial load level on ductility of CFRT frames
WANG Tiecheng,LU Mingqi.Finite element analysis of effect of axial load level on ductility of CFRT frames[J].Journal of Jilin University:Eng and Technol Ed,2005,35(1):70-75.
Authors:WANG Tiecheng  LU Mingqi
Abstract:In order to research axial load level of columns' effect on the ductility of concrete-filled rectangular tubular frame, its nonlinear finite element analysis model was built. Compared with the experimental hysteretic curve under low-reversed cyclic loading, the computational results were found highly accurate, so this model can be applied to structure analysis of concrete-filled rectangular tubular frames. So the model was used in the finite element analysis of concrete-filled rectangular tubular frames with different axial load levels under low-reversed cyclic loading. Compared the computational hysteretic curves and displacement ductility ratios, it concludes that the ductility of CFRT frames reduces with the increasing of the axial load levels of edge columns and middle columns.
Keywords:engineering mechanics  axial load level  concrete-filled rectangular steel tube  frame  ductility  finite element
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