部分预应力混凝土结构,多为同时配有预应力钢筋和非预应力钢筋的混合配筋结构。由于合理地配置了预应力钢筋和非预应力钢筋,使结构的使用状态(拱度、裂缝等)得以改善。由于减少了预应力钢筋用量,它在经济上也优于全预应力混凝土结构。然而,由于配置了较多数量的非预应力钢筋,结构的收缩,徐变特性有所变化,非预应力钢筋对混凝土收缩 Part of the prestressed concrete structure, mostly with both prestressed steel and non-prestressed reinforced concrete reinforcement structure. Due to the rational allocation of prestressed steel and non-prestressed steel, so that the structure of the state (cambers, cracks, etc.) can be improved. It is also economically better than full prestressed concrete structures due to the reduced amount of prestressing steel. However, due to the configuration of a larger number of non-prestressed tendons, the structural shrinkage and creep properties change, and the non-prestressed tendons shrink the concrete