开口薄壁杆件由于斜弯曲引起的扭弯计算

本文论证了开口薄壁杆件在斜弯曲情况下，不仅产生两向弯曲变形，而且伴随着扭转变形的发生。 导出了扭转角计算公式和相应的扭弯内力计算公式，这些内力与外力之间关系是非线性的，实例证明， 在某些情况下，附加内力不容忽视。

Calculation of Torsion-Bending of Open-Walled Menbers Subjected to Skew-Bending

An open thin-walled membed subjected to skew-bending not only produces the bending deformations in two principle directions, but causes torsion as well. The relationship between the internal and external forces is shown to be non- linear.Formulas are derived for the angle of torsion and for the internal forces of torsion-bending. An example for illustration is given, which helps to con- clud that under certain circumstances, the torsion effect on an open thin-walled member must not be neglected.