Struts of singly symmetric section need to be checked on flexural torsional buckling, 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。
Struts of monosymmetric section built with angles and cut-Ts need to be checked on flexural-torsional buckling.
单轴对称的角钢、T型钢压杆有必要做弯扭屈曲验算。
Secondly, a classical elastic flexural-torsional buckling tests on arch is introduced, which is simulated by shell element SHELL63 and beam element BEAM189 of commercial software ANSYS.
其次介绍了一个经典的拱的弹性弯扭屈曲试验，并采用有限元商业软件ANSYS中的SHELL63单元和BEAM189单元分别进行了模拟。
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