Method for including restrained warping in traditional frame analyses

Heron

P.C.J. Hoogenboom¹ 

[1] 1 Delft University of Technology, Faculty of Civil Engineering and Geosciences

关键词: Torsion;    frame analysis;    restrained warping;    design method;   

DOI  :  

学科分类：建筑学

来源: Technische Universiteit Delft * Faculty of Civil Engineering

【 摘 要 】

Restrained warping is important for the torsion deformation and axial stresses of thin-wall open sections. However, this phenomenon is not included in commonly used frame analysis programs. This paper presents a simple method to include the effect of restrained warping of member ends in a frame analysis. In this method, prior to the frame analysis the structural designer increases the section torsion stiffness by a factor. After the analysis the structural designer obtains the extreme bi-moments and axial stresses from the computed torsion moment. The method is demonstrated in three examples. The importance of restrained warping is shown.

【 授权许可】

Unknown