空腹箱形梁的整体稳定性分析

本文采用等效厚度的方法将加缀板的空腹箱形梁转换为闭口薄壁截面梁.按照乌曼斯基的理论,建立了闭口薄壁梁的侧扭屈曲总势能方程;从总势能驻值原理出发,导出了一个适用于各种荷载与各种支承条件的薄壁截面梁的临界弯矩表达式。

Analysis of the Whole Stability of a Hollow Box Beam

In this paper, the method of equivalent thinkness is adopted to transfer a hollow box beam with batten plates into a closed thin—walled section one. According to A. A. Umanskii theory, an equation of total potential energy for lateral buckling of the closed thin—walled section beam is estabished. Finally, on the basis of stationary value theory of total potential energy, a general formula applied to all kind of conditions of loading and support is derived.