本文根据混凝土徐变老化理论,阐述了考虑混凝土各节段加载龄期差异影响由徐变引起的超静定结构内力重分布的分析方法。对于高次超静定结构的徐变变形协调方程组采取数值积分法来近似求解,为了加快计算速度,引进了以指数形式表示的近似解,用线性回归法求出指数公式的常数。本文还举例说明计算方法,并对予应力混凝土斜拉桥的徐变特性作了评述。 According to the theory of creep and creep of concrete, this paper expounds the analytical method of internal force redistribution caused by creep caused by the difference of loading ages of concrete segments. For the high-order statically indeterminate structure, the equations of coccyx deformation are approximated by the numerical integration method. In order to speed up the calculation, an approximate solution in exponential form is introduced and the constant of the exponential formula is found by linear regression. The paper also illustrates the calculation method and comments on the creep characteristics of prestressed concrete cable-stayed bridges.