混凝土受弯构件在少筋的情况下容易发生钢筋拉断的脆性破坏 ,特别是预应力混凝土构件由于初始张拉力的存在更容易发生脆性破坏 .因此 ,对预应力混凝土构件的最小配筋率限制得更严格 .针对预应力混凝土空心板最小配筋率不满足的情况 ,采用调整张拉控制应力系数Cx 值和部分张拉受力钢筋两种方法 ,对预应力混凝土空心板最小配筋率的变化情况进行了分析和讨论 ,通过对计算结果的分析处理 ,对预应力空心板的设计提出几点建议 ,所得优化系数有较好的应用价值 . Concrete flexural members tend to fracture brittle failure of tendons with less tendons, especially prestressed concrete members are more prone to brittle failure due to the initial tensile force.Therefore, the minimum reinforcement ratio of prestressed concrete members limits More stringent.For prestressed concrete hollow slab minimum reinforcement rate is not satisfied with the situation, the use of adjusting the tension control coefficient of stress Cx value and part of the tension by the two methods of reinforcement, prestressed concrete hollow slab minimum reinforcement ratio The analysis and discussion on the changes are made. Through the analysis and calculation of the calculation results, some suggestions on the design of the prestressed hollow slab are put forward. The obtained optimal coefficients have good application value.