Research Article
Dec 1982
Analytical Model for Concrete Confinement in Tied Columns
Authors: Shamim A. Sheikh and S. M. Uzumeri, M.ASCEAuthor Affiliations
Publication: Journal of the Structural Division
Volume 108, Issue 12
Abstract
An analytical model for the confinement mechanisms in tied columns has been developed. The model is based on the test results reported previously. A complete stress-strain curve for confined concrete is proposed. The strength of the confined concrete is calculated by using the concept of the effectively confined concrete area within the nominal concrete core. The area of the effectively confined concrete is determined by the tie spacing, the distribution of longitudinal steel around the core perimeter and the resulting tie configuration. According to the model, better distribution of longitudinal steel and smaller tie spacing result in higher strength and ductility of concrete. Other variables examined include the volumetric ratio of lateral reinforcement and the characteristics of steel. The results from the model agree well with the test results. Practical examples demonstrating the application of the model have been presented. Building code requirements for confinement are examined and it has been concluded that in certain circumstances the Codes provisions may be unsafe, while in others they may be unnecessarily conservative.
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Published In
Journal of the Structural Division
Volume 108 • Issue 12 • December 1982
Pages: 2703 - 2722
Copyright
© 1982 American Society of Civil Engineers.
History
Published in print: Dec 1982
Published online: Feb 1, 2021
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Authors
Affiliations
Shamim A. Sheikh
Asst. Prof., Dept. of Civ. Engrg., Univ. of Houston, Houston, Tex.
S. M. Uzumeri, M.ASCE
Prof., Dept. of Civ. Engrg., Univ. of Toronto, Toronto, Canada
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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.
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.