Cutting roll formed steel C-section to stub columns will produce different extent of cross section distortion along the lengths and cause additional initial geometric imperfections.

• 把辊轧成型的C形冷弯薄壁型钢构件切割成若干短柱，在短柱中将产生不同程度的歪曲变形，进而引起附加的初始几何缺陷。