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.
Get full access to this article
View all available purchase options and get full access to this article.
References
ACI Committee 318. (2005). “Building code requirements for structural concrete (318-05) and commentary.” ACI 318R-05, Farmington Hills, Mich.
Collins, M. P., and Mitchell, D. (1994). Prestressed concrete structures, Prentice-Hall, Englewood Cliffs, N.J.
Li, B., Park, R., and Tanaka, H. (2000). “Constitutive behavior of high-strength concrete under dynamic loads.” ACI Struct. J., 97(4), 619–629.
Li, B., Park, R., and Tanaka, H. (2001). “Stress-strain behavior of high-strength concrete confined by ultra-high and normal-strength transverse reinforcements.” ACI Struct. J., 98(3), 395–406.
Mander, J. B., Priestley, M. J. N., and Park, R. (1988a). “Observed stress-strain behavior of confined concrete.” J. Struct. Eng., 114(8), 1827–1849.
Mander, J. B., Priestley, M. J. N., and Park, R. (1988b). “Theoretical stress-strain model of confined concrete.” J. Struct. Eng., 114(8), 1804–1826.
Park, R., and Paulay, T. (1975). Reinforced concrete structures, Wiley, New York.
Rots, J. G., Nauta, P., Kusters, G. M. A., and Blaauwendraad, J. (1985). “Smeared crack approach and fracture localization in concrete.” Heron, 30(1), 1–48.
Whitney, C. S. (1942). “Plastic theory of reinforced concrete design.” Proc., ASCE, Transactions ASCE, Vol. 107, ASCE, New York, 251–326.
Information & Authors
Information
Published In
Copyright
© 2011 ASCE.
History
Received: Dec 2, 2009
Accepted: Aug 23, 2010
Published online: Aug 24, 2010
Published in print: Feb 2011
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.