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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。
In this paper, the actual elastic-plastic rod is used as the model to calculate the deflection curve and the terminal deformation of the rod by the method of inverse element length. Meanwhile, the change rule of the elastic zone along the length of the rod and the terminal deformation correction according to the boundary conditions are output. The stiffness of the variable cross-section of the rod for the calculation model, derived the deformation of the two rod-end correlation formula, the beginning of the deformation correction rules to follow. Thus, a method of calculating the relationship between load effect and rod-end deformation by using the whole elastic-plastic beam-column as a unit is found. This method is the basis for further discussion of elasto-plastic beam-column system.