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预应力混凝土受弯构件的挠度与预应力、荷载、混凝土徐变和收缩等有关，因此是非线性的。本文提出了求解任一时间挠度的计算方法，其中考虑了各种因素的影响，导出了混凝土徐变与收缩相关系数的实用公式和混凝土徐变和收缩时，因拉、压钢筋用量不同而引起的梁变形的曲率公式，并给出了算例，与实测比较，结果令人满意。
The deflection of prestressed concrete flexural members is related to prestress, load, concrete creep and shrinkage, and is therefore nonlinear. This paper proposes a method to solve the deflection at any time, taking into account the influence of various factors, deducing the practical formula of concrete creep and shrinkage correlation coefficient and when the concrete is creeping and shrinking, due to the different amount of drawing and pressing steel bars. The curvature formula of the beam deformation is given, and an example is given. Compared with the actual measurement, the result is satisfactory.