Abstract: This paper establishes the correlation equation of two end deformations of steel beam-columns. By combining it with the contrary calculation of segment length method, a new calculation method is reached for the ultimate strength of steel beam-columns. In this method, the beam-column is considered as on the element. It is the basis of calculating ultimate strength of fixed steel beam-columns and steel frames.

Key words: beam-columns, the contrary calculation of segment length method, correlation equation

摘要： 本文以实际弹塑性杆件为计算模型,用逆算单元长度法计算杆件的挠曲线和终端变形,同时输出弹性区沿杆长的变化规律和按边界条件确定的终端变形修正量;以弹性区刚度所组成的变截面杆件为计算模型,导出了两杆端变形增量的相关公式,使始端变形的修正有规则可循。从而找到了以整个弹塑性梁-柱作为一个单元计算荷载效应和杆端变形效应关系的方法,这种方法是进一步讨论弹塑性梁-柱体系的基础。

关键词: 梁一柱, 逆算单元长度法, 相关方程