本文提出了计算节段式桥梁由于混凝土徐变,收缩和力筋松弛所产生的变位和应力分布的逐步计算法。本文提到了可用于上述目的的通用计算程序,列于附录Ⅱ的程序框图概括了分析步骤。计算程序中计入了非预应力筋的存在、各节段混凝土龄期的差异、多阶段施加的外荷和预应力,以及随着施工的进展而发生的几何形状与支承条件的不断改变等因素。在三跨连续梁中应用了本文建议的方法,计算结果表明了随时间而变化的效应的重要意义。 This paper presents a step-by-step method for calculating the displacement and stress distribution of segmental bridges due to creep, shrinkage and relaxation of tendons. This document refers to general purpose computing programs that can be used for this purpose. The block diagram appendix II summarizes the analysis steps. The calculation procedure includes the existence of non-prestressed tendons, differences in age of concrete in each segment, external loads and prestresses applied in multiple stages, and changes in geometry and support conditions as construction progresses factor. The proposed method is applied to a three-span continuous beam and the results show the significance of the effect over time.