Effects of Confinement on Concrete Columns: Plasticity Approach
Publication: Journal of Structural Engineering
Volume 120, Issue 9
Abstract
The theory of plasticity and the deformation compatibility equations are used to evaluate the development of lateral confinement of concrete columns, and the resulting increases in strength and ductility. Concrete is modeled as an elastoplastic material following a simple Drucker‐Prager nonassociative hardening model. The lateral reinforcement is replaced by an equivalent sleeve that surrounds the concrete core. The solution is based on the integration of the elastoplastic relations for the concrete core, the transverse steel reinforcement, and the concrete cover. The lateral pressure on the concrete core is calculated based on the compatibility of deformations of the expanding core and the surrounding reinforcement. The ability of the method to predict the response of confined compression members is demonstrated based on numerous published experimental results. The application of the theory is currently restricted to circular ties and spirals. Future studies will address rectangular confinement.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Abdulla, A. A. (1992). “Testing and constitutive modeling of cemented soils,” PhD thesis, University of Arizona, Tucson, Ariz.
2.
Ahamd, S. H., and Shah, S. P. (1982). “Stress‐strain curves of concrete confined by spiral reinforcement.” ACI J., 79,484–490.
3.
Chen, W. F. (1982). Plasticity in reinforced concrete, McGraw‐Hill Book Company, New York, N.Y.
4.
Faruque, M. O. (1987). “A cap type constitutive model for plain concrete.” Constitutive laws for engineering materials: theory and applications. C. S. Desai, E. Krempl, P. D. Kiousis, and T. Kundu, eds., Vol. 1, Elsevier Science Publishing Co., Inc., New York, N.Y. 395–402.
5.
Iyengar, K. T. S. R., Desayi, P., and Reddy, K. N. (1970). “Stress‐strain characteristics of concrete confined in steel binders.” Mag. Concr. Res., London, 22(72), 173–184.
6.
Kiousis, P. D., and Abdulla, A. A. (1992). “Associative plasticity for dilatant soils.” J. Engrg. Mech., ASCE, 118(4), 763–785.
7.
Mander, J. B., Priestley, M. J. N., and Park, R. (1988a). “Observed stress‐strain behavior of confined concrete.” J. Struct. Engrg., ASCE, 114(8), 1827–1849.
8.
Mander, J. B., Priestley, M. J. N., and Park, R. (1988b). “Theoretical stress‐strain model for confined concrete.” J. Struct. Engrg., ASCE, 114(8), 1804–1826.
9.
Ohtani, Y., and Chen, W.‐F. (1988). “Multiple hardening plasticity for concrete materials.” J. Engrg. Mech., ASCE, 114(11), 1890–1910.
10.
Ortiz, M., and Popov, E. P. (1985). “Accuracy and stability of integration algorithms for elastoplastic constitutive relations.” Int. J. Numer. Methods Eng., 21(9), 1561–1576.
11.
Park, R., and Sampson, R. A. (1972). “Ductility of reinforced concrete column sections in seismic design.” ACI J., 69(9), 543–551.
12.
Ramber, W., and Osgood, W. R. (1943). “Description of stress‐strain curves by three parameters.” Tech. Note 902, Nat. Advisory Committee for Aeronautics, Washington, D.C.
13.
Scott, B. D., Park, R., and Priestley, M. J. N. (1982). “Stress‐strain behavior of concrete confined by overlapping hoops at low and high strain rates.” ACI J., 79(1), 13–27.
14.
Sheihk, S. A., and Uzumeri, S. M. (1982). “Analytical model for concrete confinement in tied columns.” J. Struct. Engrg. Div., ASCE, 108(12), 2703–2722.
Information & Authors
Information
Published In
Copyright
Copyright © 1994 American Society of Civil Engineers.
History
Received: Aug 23, 1993
Published online: Sep 1, 1994
Published in print: Sep 1994
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.