四肢楔形格构式轴心受压构件的计算长度系数

Calculated length coefficients of four-limb wedge-shaped lattice axial compression members

对于四肢楔形变截面格构式构件,利用Ritz法推导弹性屈曲载荷和计算长度系数公式,与Abaqus软件模拟结果进行对比,探讨构件中间部分等截面长度、两端变截面长度等参数影响。结果表明,推导公式具有良好的精度,结果偏于安全,可为变截面受力构件的工程设计提供参考。

For wedge-shaped lattice members with variable cross-section of four-limb,the elastic buckling load and effective length coefficient formula are derived by Ritz method,and compared with the simulation results of Abaqus software,the influence of parameters such as the constant cross-section length of the middle part of the member and the variable cross-section length of both ends of the member is discussed.The results show that the derived formula has good accuracy and the results are safety,which can provide a reference for the engineering design of the variable cross-section stressed members.