十字形截面轴心钢压杆的扭转屈曲

Torsional buckling of axial steel struts of crisscross section

十字形截面轴心钢压杆有必要进行扭转屈曲的验算,计算方法宜采用换算长细比法。对四类常见十字形截面轴心压杆的弯曲屈曲和扭转屈曲承载力进行了比较分析,得出十字形截面轴心压杆由扭转屈曲控制设计的条件,并利用截面特性近似值得出了剖分工字钢焊接十字形截面轴心压杆扭转屈曲的实用设计公式,可供广大科研及设计人员参考。

Axial steel struts of crisscross section need to be checked on torsional buckling. The approach of equivalent slenderness ratio is recommended for calculation purpose. The bearing capacity of both flexural buckling and torsional buckling of four ordinary kinds of axial struts of crisscross section is comparative analyzed. The designed conditions of the axial struts of crisscross section which controlled by the capacity of torsional buckling are educed. The utility designed formula of the axial struts of cut-I welding crisscross section under the condition of torsional buckling is derived from the approximation of the cross-section’s characteristic. It can be referenced by immensity scientific and design staff.