本文通过试验:用统计和曲线拟合方法,分析了非恒温恒湿条件下混凝土梁的自由收缩和予应力引起梁的部分徐变过程;用平均曲率法推导了迭合梁收缩徐变微差曲率公式;验证了平均曲率等假定;提出了予应力徐变较小时迭合梁收缩徐变微差曲率的简化公式;研究了收缩徐变微差与截面特征的关系及对迭合梁的作用。 In this paper, through experimentation, statistical analysis and curve fitting methods were used to analyze the free-shrinkage and pre-stress of concrete beams caused by non-constant temperature and humidity conditions, and the partial creep of beams was deduced. The mean curvature method was used to derive the formula for the differential curvature of the shrinkage and creep of laminated beams. The assumptions such as mean curvature were verified; a simplified formula for the differential curvature of the shrinkage and creep of the laminated beam when the prestress creep was small was proposed; the relationship between the differential shrinkage and creep and the cross-sectional characteristics and the effect on the laminated beam were studied.