廖秋春
    (台州市建设工程设计审查中心，台州318000)

[摘要] 现行预应力混凝土结构正截面受弯承载力计算复杂冗长，力学原理抽象难以理解，计算结果偏于不安全。认为次弯矩是虚拟的，算式f_cbx=f_yA_s+f_pyA_p不能成立，并提出了预应力混凝土结构正截面受弯承载力按普通偏心受压构件计算的方法。
[关键词] 预应力混凝土；等效荷载法；次弯矩；综合弯矩；综合轴力

    Discussion of calculation method of the flexural capacity for the pre-stressed concrete structure
    Liao Qiuchun
    ( Taizhou Construction Engineering Design Inspection Center, Taizhou 3 18000, China)

Abstract: The present calculation method of the flexural capacity for the pre-stressed concrete structure was complex and lengthy. The mechanical principle involved in it was abstract and difficult to understand. The result was no safety. Considering the second bending moment was fictitious and hypothesized, so mathematical formula  f_cbx=f_yA_s+f_pyA_pwas unavailable.A new method was proposed that the flexural capacity of the pre-stressed concrete structure was calculated according to the ordinary eccentric compression member.
Keyword: pre-stressed concrete structure; equivalent load method; the second bending moment, total moment, total traction