Torsion and Flexure of Closed Thin-Walled Beams

by Ray N. Nitzsche,
Robert E. Miller,

Serial Information: Journal of the Engineering Mechanics Division, 1976, Vol. 102, Issue 1, Pg. 189-193

Document Type: Journal Paper


In Ref. 2, a method of determining the stress and deformation of curved thin-walled beams having general loading and geometry was presented. This method considered the effects of warping of the cross section and was applicable to both open and closed cross sections. In addition, the concepts of the shear center and the center of twist were no used in the analysis. Contained herein are the results of the application of the aforementioned theory to a straight closed cross section beam having its ends constrained against warping. Also included are the results for an unsymmetrical straight beam, which was studied to investigate the question of the effect of warping constraint on the location of the center of twist. This was done because there appears to be some discrepancies in the literature concerning this question.

Subject Headings: Warpage | Cross sections | Torsion | Beams | Curved beams | High-rise buildings | Deformation (mechanics) | Load factors

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