【摘要】 在开口薄壁构件的约束扭转中，外扭矩的一部分由构件组成机件的抗弯刚度承担，另一部分由构件的抗扭刚度承担．这两部分的分配比例在不同我面是不同的，教精确计算很复杂．本文所提出的近似计算方法主要是通过特定截面的变形协调来确定此分配比例，使计算大为简化，误差亦不大，有较高的实用价值．更多还原

【Abstract】 For open section thin-walled member under constrained torsion, a part of twisting moment is resisted by the bending rigidity of the component plates of the member, and another part by the torsional rigidity of the whole section. The distribution ratio between two parts is different at different section, therefore, a rigorous solution of the problem is very complicate. This paper suggests an approximate method to calculate the distrubtionratio by consist deformation at special section. Therefore, the calculation is greatly simplified with acceptable errors.更多还原