摘要
本文利用双轴对称十字型截面轴压杆的局部屈曲和整体扭转屈曲的近似等价性质,得到并证明了开口薄壁杆件局部屈曲前后其自由扭转刚度是基本不变的结论。该结论对于研究开口薄壁杆件局部屈曲和整体弯扭屈曲的相关作用具有重要的意义。
The paper utilizes the approximate equivalency between the local buckling and the overall torsional buckling of the cruciform cross-section members with double axis symmetry under axial load to study the variation of the free-torsional stiffness of the thin-walled sections with open-profiles after it buckles locally.It is found that the frcc-torsional stiffness is basically unchanged before and after the cross-section buckles. This conclusion has significant meaning to study the interaction between the local buckling and the overall lateral-torsional buckling of the thin-walled member with open-profiles.
关键词
薄壁
杆件
局部
屈曲
扭转
刚度
local buckling
complete buckling/thin-walled member
interaction
free-torsional stiffness
