本文提出了预应力梁的优化设计方法。以梁的截面高度和预应力钢筋的预拉力为设计变量,以预应力钢筋和混凝土的费用为目标函数,并以现行规范的设计要求为约束条件,采用直接搜索法和“SUMT”法求解。在文章中给出了实例计算和列出了“SUMT”法的电算程序框图。 This paper proposes an optimized design method for prestressed beams. Taking the section height of beams and the pretension of prestressed steel bars as design variables, and the cost of prestressed steel bars and concrete as the objective function, and taking the design requirements of the current specifications as constraints, the direct search method and the “SUMT” method are used to solve the problems. The example calculations and block diagrams for the “SUMT” method are given in the article.