Open cross-section, thin-walled, cold-formed steel columns have at least three competing buckling modes: local, distortional, and flexural-torsional buckling.

• 摘要冷弯开口薄壁型钢构件的失稳模式主要有三种：局部屈曲，畸变屈曲，整体屈曲（弯曲失稳或弯扭失稳）。