本文提出了坡形门式刚架结构弹塑性稳定的有限元分析方法。文中导出了有大位移及轴向力影响的杆在弹塑性状态下的单元切线刚度矩阵。同时还较全面地考虑了坡形门式刚架横梁受轴力时对柱约束的影响,提供了有利于计算变截面刚架近似处理方法。编制了相应的计算机程序。并进行了模型试验,从试验数据与计算结果来看,较为吻合。 This paper presents the elasto-plastic stability finite element analysis method for the slope-shaped portal frame structure. In this paper, the tangential stiffness matrix of the element in the elasto-plastic state of the bar with large displacement and axial force is derived. At the same time, the influence of the axial force of the girder-type portal frame on the column restraint is considered more comprehensively, and an approach for calculating the approximate treatment of the variable-section rigid frame is provided. Prepared a corresponding computer program. A model test was carried out. From the test data and the calculation results, it is consistent.