Research Article
Jun 1980
Dowel Action in Concrete Beams Subject to Torsion
Publication: Journal of the Structural Division
Volume 106, Issue 6
Abstract
The test program included 14 beams, two of which were of plain concrete, six longitudinally reinforced with corner bars of varying diameters, and six with both longitudinal and transverse steel having varying percentages of stirrups. Dowel action was elaborately isolated from other mechanisms of interface shear transfer, such as aggregate interlock, by using thin smooth brass diaphragms introducing a preformed crack or a simulated whole failure surface leading to a preset torsional mechanism of failure. Variation of angle of twist with the applied torque and the corresponding relative rotation of the two beam segments at the failure crack were recorded up to and beyond ultimate torque capacity. The dowel stress per unit displacement was found to be a variable decreasing nonlinearly with the increase in the relative rotation of the two beam segments. Expressions were derived for this variation and for the prediction of ultimate torque capacity of concrete members with and without web reinforcement incorporting dowel forces.
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Information
Published In
Journal of the Structural Division
Volume 106 • Issue 6 • June 1980
Pages: 1263 - 1277
Copyright
© 1980 American Society of Civil Engineers.
History
Published in print: Jun 1980
Published online: Feb 1, 2021
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Authors
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Mahmoud A. Reda Youssef
Assoc. Prof. of Civ. Engrg., Cairo Univ., Cairo, Egypt
Alfred G. Bishara, M.ASCE
Prof. of Civ. Engrg., The Ohio State Univ., Columbus, Ohio.
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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.
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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.