目前设计预应力混凝土超静定结构常用等效荷载法,此法计算次弯矩需要由综合弯矩减去主弯矩得到,然后通过次弯矩分布得到次剪力,计算繁琐。从次弯矩产生的原理出发,利用子结构思想,提出通过施加等效温度荷载直接计算预应力混凝土结构次内力的方法,并利用分析软件进行了验证。 At present, the commonly used equivalent load method for statically indeterminate prestressed concrete structures is designed. The secondary moment calculated by this method needs to be obtained by subtracting the main moment from the integrated moment, and then the secondary force is obtained through the distribution of the second moment, so the calculation is cumbersome. Based on the theory of sub-structure, this paper proposes a method to directly calculate the sub-internal force of prestressed concrete structures by applying the equivalent temperature load and verifies with the analysis software.