Research Article
Jun 1970
Arch Action and Bond in Concrete Shear Failures
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VIEW THE REPLYAuthors: Ramnath N. Swamy, M.ASCE, Alexios Andriopoulos, and Dotun Adepegba, AM.ASCEAuthor Affiliations
Publication: Journal of the Structural Division
Volume 96, Issue 6
Abstract
Numerous investigators have suggested that a cracked reinforced beam without web steel behaves like a tied-arch. From a study of strain measurements in steel and on concrete, it is shown that a normally reinforced beam failing in shear behaves essentially like a beam up to failure, in spite of extensive cracking and deformation. External loads can be resisted by arch action only when the web acts in compression. Data reported show that such action can be developed in a beam only when the steel is fully unbonded between strong end anchorages. Arch action enhances the shear resistance of an unbonded beam beyond that of a bonded beam failing in shear but also increases deflection and reduced the flexural capacity. Lack of bond, however, is not a guarantee against shear failure or even diagonal cracking. The surface conditions of the longitudinal steel are shown to have limited influence on ultimate shear resistance.
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Published In
Journal of the Structural Division
Volume 96 • Issue 6 • June 1970
Pages: 1069 - 1091
Copyright
© 1970 American Society of Civil Engineers.
History
Published in print: Jun 1970
Published online: Feb 1, 2021
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Affiliations
Ramnath N. Swamy, M.ASCE
Senior Lecturer, Dept. of Civ. and Struct. Engrg., Univ. of Sheffield, Sheffield, England
Alexios Andriopoulos
Research Student, Dept. of Civ. and Struct. Engrg., Univ. of Sheffield, Sheffield, England
Dotun Adepegba, AM.ASCE
Lecturer, Faculty of Engrg., Univ. of Lagos, Lagos, Nigeria
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