Based on the design code of concrete structure(GBJ10-89), the paper gives the nominal tensile stress method of controlling crack width in prestressed concrete structure of punchy bars.

• 以混凝土结构设计规范(GBJ10-89)为基础，建立了强力钢筋做预应力筋的预应力混凝土结构用名义拉应力控制裂缝宽度的方法。