Struts of singly symmetric section need to be checked on flexuraltorsionalbuckling, according to the current code for steel structure (GB50017—2003).
《钢结构设计规范》（GB50017—2003）提出对单轴对称截面钢压杆的弯扭屈曲需做单独验算。
2
Struts of monosymmetric section built with angles and cut-Ts need to be checked on flexural-torsionalbuckling.
单轴对称的角钢、T型钢压杆有必要做弯扭屈曲验算。
3
Secondly, a classical elastic flexural-torsionalbuckling tests on arch is introduced, which is simulated by shell element SHELL63 and beam element BEAM189 of commercial software ANSYS.