近年来,随着部分预应力砼梁应用的推广,发现我国规范所采用的名义拉应力法的计算结果不稳定。为找出其中存在的问题,本文使用美国人戴明总结的一套科学工作程序,即PDCA循环法对问题进行了研究,获得的结论可供修订规范时参考。 In recent years, with the promotion of the application of some prestressed concrete beams, it is found that the calculation results of the nominal tensile stress method adopted by our country code are not stable. In order to find out the existing problems, this paper uses a set of scientific working procedures summarized by American Deming, that is, the PDCA circulation method is used to study the problems, and the conclusions obtained can be referenced for the revision of norms.