本文提出承受复合内力的单室薄壁箱结构的计算极限荷载的近似法。本文是利用广义塑性铰的概念推导出的,其中使用了下述假定: (a)极限状态的内外力之比保持同弹性状态; (b)极限应力分布取多个矩形。模型试验证明了本文方法的可用。 This paper presents an approximate method for calculating the ultimate load of a single-wall thin-wall box structure subjected to composite internal forces. This article derives from the concept of a generalized plastic hinge, in which the following assumptions are used: (a) The ratio of the internal and external forces of the limit state maintains the same elastic state; (b) The limit stress distribution takes multiple rectangles. Model tests demonstrate the usability of this method.