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本文在文[2]的基础上,继续讨论了弹塑性梁-柱当轴向压力N发生改变时杆端变形增量的相关关系。文中导出了轴力增量ΔN引起的杆端变形的增量关系式,与文[2]巳建立的杆端变形增量相关方程合并,得到了弹塑性梁-柱在纵向力系、横向力系同时改变时两杆端变形增量与纵、横力系增量的相互关系式,从而使框架结构的计算能以每根梁-柱为独立单元,按逆算单元法计算出结构的承载能力。
Based on the paper [2], this paper discusses the relationship between the elastic deformation of rod and column when the axial pressure N changes. In this paper, the incremental relationship of the rod end deformation caused by the increment of axial force ΔN is deduced, which is combined with the equation of rod end deformation increment established in [2], and the elastic-plastic beam- The relationship between the increment of two rod ends and the increment of longitudinal and transverse force can be changed at the same time so that the calculation of the frame structure can take each beam-column as an independent unit and calculate the bearing capacity of the structure according to the inverse calculation unit method .