Stress-Block Parameters for Unconfined and Confined Concrete Based on a Unified Stress-Strain Model
Publication: Journal of Structural Engineering
Volume 137, Issue 2
Abstract
Equations to obtain equivalent rectangular stress-block parameters for unconfined and confined concrete are derived for rapid (hand) analysis and design purposes. To overcome a shortcoming of existing commonly used stress-strain models that are not easy to integrate, a new stress-strain model is proposed and validated for a wide range of concrete strengths and confining stresses. The efficacy of the equivalent rectangular stress-block parameters is demonstrated for hand calculations in predicting key moment-curvature results for a confined concrete column. Results are compared with those obtained from a computational fiber-element analysis using the proposed stress-strain model and another widely used existing model; good agreement between the two is observed.
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References
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Information
Published In
Journal of Structural Engineering
Volume 137 • Issue 2 • February 2011
Pages: 270 - 273
Copyright
© 2011 ASCE.
History
Received: Dec 2, 2009
Accepted: Aug 23, 2010
Published online: Aug 24, 2010
Published in print: Feb 2011
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