In these paper we use the following rule to determine the width - to - thickness ratio : if the local buckling has visible effect on the overall buckling capacity , then this width - to thickness ratio should not be exceeded based on the resul ts obtained , we proposed a new formula for the limitation of the ratio of h / tw of the t - section columns " webs 根據(jù)局部失穩(wěn)對整體失穩(wěn)不應(yīng)該有顯著影響的原則,最后得到t形截面壓桿腹板的寬厚比限值計算公式。本文對規(guī)范修訂和工程應(yīng)用有一定的參考作用。