Research Article
Feb 1965
Torsion of Structural Shapes
Publication: Journal of the Structural Division
Volume 91, Issue 1
Abstract
Charts and empirical formulas are provided for the accurate calculation of the torsion constant for the wide flange, I, channel, tee, zee, and angle structural shapes. The differential equation in solving the torsion stress function is replaced by a difference equation, and the stress function is evaluated at nodal points of a fine square mesh net by means of the digital computer. The formulas for the torsion constant make use of existing solutions for the rectangular section but provide accurate correction for the additional torsional rigidity resulting from the juncture of rectangular component parts including the effect of the fillets and the variation in flange thickness of the channel and I-sections. Shear stresses caused by uniform torsion are also evaluated. Calculations for both torsion constant and stress are aided by means of graphical charts.
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Published In
Journal of the Structural Division
Volume 91 • Issue 1 • February 1965
Pages: 203 - 227
Copyright
© 1965 American Society of Civil Engineers.
History
Published in print: Feb 1965
Published online: Feb 1, 2021
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Authors
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I. A. El Darwish, AM.ASCE
Lecturer, Structural Engrg. Dept., Univ. of Alexandria, Alexandria, Egypt (UAR)
Bruce G. Johnston, F.ASCE
Prof. of Structural Engrg., Civ. Engrg. Dept., The Univ. of Michigan, Ann Arbor, Mich.
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Save for later Item saved, go to cart Information on ASCE Library Cards
ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.