带有和不带缀板薄壁压杆弯扭屈曲计算问题

Torsional-flexural buckling of thin-walled columns with battens and without battens

导出了带有和不带缀板单轴对称开口截面薄壁压杆弯扭屈曲计算公式 .该式物理意义清楚 ,形式规范 .通过采用关系式 lω =kωl,解决了现行设计规范关于lω 定义中存在的问题 .缀板的作用是使lω 值减小 ,恰似构件长度方向上的扭转约束支点的作用一样 .最后 ,对现行钢结构设计规范中空缺的α和lω 值提出了补充 .

A formula for computing torsional_flexural buckling of thin_walled singly symmetric open section with battens and without battens under concentric or eccentric load has been derived. The formula is clear in its physical meaning and normal in form. By using the relation l\-ω=k\-ωl, the problem of definition of l\-w in the current specification has been solved. The effect of the battens is reducing the value of l\-ω as if the battens are the torsional brace points along the span of the column. The values being short of both α and l\-ω in the Design Specification of Steel Structures have lastly been complemented.