On the basis of this , the paper makes a great deal of calculation and analysis in this part , different parameters " effect and stress gradient are included . local buckling coefficient and the efficient width calculated formula are provided and look forward to take a reference to the redaction of the specification 本文对此内容进行了较为深入的研究,考虑了多个参数的影响,对各种应力比作用下的楔形腹板的屈曲及屈曲后强度进行了计算分析,得出了考虑翼缘相关作用的楔形腹板屈曲系数及有效宽度系数的计算公式,以期为规范的修订提供参考。