引用本文: 陈东亮, 张元海. H形钢梁考虑有限翘曲约束刚度的扭转效应分析. 力学与实践, 2023, 45(2): 389-394.
Chen Dongliang, Zhang Yuanhai. Analysis on torsional effect of H-shaped steel beams considering finite warping restraint stiffness. Mechanics in Engineering, 2023, 45(2): 389-394.
 Citation: Chen Dongliang, Zhang Yuanhai. Analysis on torsional effect of H-shaped steel beams considering finite warping restraint stiffness. Mechanics in Engineering, 2023, 45(2): 389-394.

## ANALYSIS ON TORSIONAL EFFECT OF H-SHAPED STEEL BEAMS CONSIDERING FINITE WARPING RESTRAINT STIFFNESS

• 摘要: 为考虑半刚性连接对H形钢梁翘曲变形的有限约束，引入翘曲约束刚度的概念，提出介于简单支承和固定支承之间的半刚性连接H形钢梁约束扭转计算方法。结合数值算例，验证本文方法的正确性，详细分析翘曲约束刚度变化对翘曲正应力和二次剪应力的影响。研究结果表明：翘曲约束刚度引起的双力矩沿跨度呈线性变化，翘曲正应力随翘曲约束刚度的增大而减小，二次剪应力随翘曲约束刚度的增大而增大。

Abstract: In order to consider the finite constraint of semi-rigid connections on the warping deformation of H-shaped steel beams, the concept of warping constraint stiffness is introduced, and a restrained torsion calculation method for semi-rigid connected H-shaped steel beams between simple support and fixed support is proposed. Combined with numerical examples, the correctness of this method is verified, and the effects of the change of warping constraint stiffness on warping normal stress and secondary shear stress are analyzed in detail. The results show that the bi-moment caused by the warping restraint stiffness changes linearly along the span. The warping normal stress decreases with the increase of warping constraint stiffness, and the secondary shear stress increases with the increase of warping constraint stiffness.

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