就国内现有的薄壁钢梁弯扭失稳理论进行了分析，从薄壁杆件的一般理论出发，推导出荷载过截面弯心并与主轴平行的受弯钢梁的临界弯矩公式。
On the base of the general theory of thin-walled members, we deduce a new critical moment formula of steel beam under transverse loads which pass the shear center and parallel to the main axis.
轻型桥墩是桥梁工程中常用到的一种桥墩，本文利用柔性墩失稳临界荷载非线性分析原理，分析了墩顶位移在非线性阶段对桥墩稳定性的影响。
In this paper, on the basis of non linear analysis of the flexible pier's critical load, the influence of nonlinear phase displacement of pier top on pier's stability is discussed.
讨论了钢材的初始挠曲对钢混凝土连续组合梁的极限承载力与失稳屈曲临界荷载的影响。
The influence of initial displacement on load bearing capacity and critical load of steel concrete composite structure is discussed.
本文应用非线性有限元法，对考虑初始缺陷的扭壳、扭网壳进行整体稳定分析，获得了临界状态时的失稳模态和临界荷载。
In this paper, the nonlinear FEM is used to analyze the general stability of torsional shell and torsional reticulated shell with original imperfections.
本文应用非线性有限元法，对考虑初始缺陷的扭壳、扭网壳进行整体稳定分析，获得了临界状态时的失稳模态和临界荷载。
In this paper, the nonlinear FEM is used to analyze the general stability of torsional shell and torsional reticulated shell with original imperfections.
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