工字梁在纯剪作用下翼缘对腹板屈曲的约束作用

Buckling Strength of Plate Girder Web with Flange Restraint under Pure Shear

本文采用柱屈曲特征函数应用伽勒金法计算了工字梁在纯剪作用下腹板局部屈曲时翼缘的弹性约束，得到的结果表明我国新修订的（钢结构设计规范）（ＧＢＪ１７—８８）采用的约束系数是合理的。

In this paper, the influence of the flange restraint on the buckling strengthof a plate girder web under pure shear is considered. The flange of a plate girder is regarded as a beam wiith elastically;suppouted against the rotation and deflection due to bucklingof the girder web.The eigen functions of column buckling and the GALERKIN’S methodare used to analyse the problem. The results show that the restraint coefficients given bythe national code,STEEL STRUCTURE DESIGN CODE(BFJ17 88) ,are resonable.