这篇拙著,早在工程建设第59期出版前约一年即已写出用于教学中。这里所讨论的问题与工程建设第五十九期所载张崇文先生的文章所讨论的问题完全相同。但我这篇文章,除包括张先生所讨论的以外,还对于路湛心等译萨赫诺夫斯基所著钢混下册第567页的所谓经验公式(481)式也有所论证,故登载于本于刊,以供教学和设计工作者的参考。 This myopia, written back as early as about a year prior to publication of the 59th construction project, was used in teaching. The issues discussed here are exactly the same as the ones discussed in the article by Mr. Zhang Chongwen set forth in the 59th construction phase. But my article, except for the one discussed by Mr. Zhang, also argues for the so-called empirical formula (481) on page 567 of the book by Sahanowski et al. It is published in this journal for reference by teaching and design workers.