变截面格构柱的整体稳定分析

变截面格构柱在工程中有广泛应用,基于能量等效准则,得到变截面格构柱的等效抗弯和抗剪刚度,进一步分析得到变截面悬臂格构柱的整体稳定方程。通过一系列数值求解,并与有限元的计算结果对比表明,所述方法具有较高的精度和较好的适应性,并且所有结果都偏于安全,对同类结构设计和校核具有一定的指导作用。

GLOBAL STABILITY ANALYSIS OF LATTICED COLUMNS WITH VARIABLE CROSS-SECTION

Latticed columns with variable cross section have been widely used in engineering practice. According to energy equivalent principle, the equivalent bending stiffness and the shear stiffness of latticed columns with variable cross-section were obtained. The stability function for the cantilevered latticed columns with variable crosssection was derived. Compared with the results of finite element method, the numerical results of proposed method show satisfactory accuracy and adaptability. In addition, all the results are conservative so that the proposed method can provide reference for structure design and verification.