Research Article
Sep 1972
Total Interaction Method for Torsion Design
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VIEW THE REPLYAuthors: K. S. Rajagopalan, AM.ASCE, Umakanta Behera, M.ASCE, and Phil M. Ferguson, HM.ASCEAuthor Affiliations
Publication: Journal of the Structural Division
Volume 98, Issue 9
Abstract
The validity of Behera's total interaction theory for design of reinforced concrete beams (and a simplification thereof) is demonstrated by comparison with more than 200 test beams from various investigations. Numerical design examples and added test data show that a given combination of shear-torque-moment in a given beam size can be satisfied by quite different ratios of the longitudinal steel added for torsion to the total stirrup steel used. Although extra longitudinal steel is not significant factor in resisting pure torsion, it is a major (and possibly a decisive) factor under the combined loading. The optional designs offer possible economies over the ACI 318-71 Code method. Tests by Ma of six beams having unsymmetrical top and bottom longitudinal steel are also reported. The preliminary indication is that any strength loss with unsymmetrical longitudinal steel is largely overcome by extending bars a distance beyond the points of inflection.
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Published In
Journal of the Structural Division
Volume 98 • Issue 9 • September 1972
Pages: 2097 - 2117
Copyright
© 1972 American Society of Civil Engineers.
History
Published in print: Sep 1972
Published online: Feb 1, 2021
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Authors
Affiliations
K. S. Rajagopalan, AM.ASCE
Engr., Mullen & Powell, Inc., Consulting Engineers, Dallas, Tex.
Umakanta Behera, M.ASCE
Prof. of Struct. Engrg., Regional Engineering Coll., Rourkela, India
Phil M. Ferguson, HM.ASCE
Prof. of Civ. Engrg., The Univ. of Texas at Austin, Tex.
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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.
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.