Analytical Study of Spacing of Lateral Steel and Column Confinement
Publication: Journal of Structural Engineering
Volume 124, Issue 3
Abstract
The effect of longitudinal spacing of transverse reinforcement on the confining stress in concrete columns is studied analytically. A linear-elastic solution is obtained for circular columns laterally confined by hoops. From this solution, an effective confining stress at any point and an average confining factor for circular transverse cross sections are defined. The relationship between the average confining factor and the longitudinal spacing of hoops is established from the numerical results of the analytical solution. The same procedure is then applied through a series of finite-element analyses to square columns transversely reinforced with welded-wire fabric. The resulting formula relating the longitudinal spacing and the average confining factor is remarkably similar to that found from the circular column analysis.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
ALGOR. (1990). “Modeling for finite element analysis.” ALGOR, Inc., Pittsburgh, PA.
2.
Barton, M. V. (1941). “The circular cylinder with a band of uniform pressure on a finite length of the surface.”J. Appl. Mech., September, A97–A104.
3.
Chen, B., and Mau, S. T.(1990). “Numerical simulation of behavior of spirally reinforced columns.”J. Struct. Engrg., ASCE, 116(10), 2842–2861.
4.
Grira, M., and Saatcioglu, M. (1996). “Concrete columns confined with welded reinforcement grids.”Rep. OCEERC 96-05, Ottawa Carleton Earthquake Engineering Research Centre, Ottawa, Canada.
5.
Holland, J. M. (1995). “Two-dimensional welded wire mesh as confining reinforcement in square concrete columns,” M.S. thesis, University of Houston, Houston, Tex.
6.
Iyengar, K. T., Desayi, P., and Reddy, K.(1970). “Stress-strain characteristics of concrete confined in steel binders.”Mag. of Concrete Res., London, England, 22(72), 173–184.
7.
Mander, J. B., Priestly, M. J. N., and Park, R.(1988). “Theoretical stress-strain model for confined concrete.”J. Struct. Engrg., ASCE, 114(8), 1804–1826.
8.
Martinez, S., Nilson, A. H., and Slate, F. O.(1984). “Spirally reinforced high-strength concrete columns.”ACI J., 81(5), 431–441.
9.
Mau, S. T., Holland, J., and Hong, L. “Small column compression tests on concrete confined by WWF.” (1998). J. Struct. Engrg., ASCE, 124(3), 252–261.
10.
Pallewatta, T. M., Irawan, P., and Maekawa, K.(1996). “Confinement effectiveness of laterally reinforced arrangements in core concrete.”Concrete Library of Jpn Soc. Civ. Engrs., 27, 197–223.
11.
Park, R., Priestley, M. J. N., and Gill, W. D.(1982). “Ductility of square-confined concrete columns.”Proc., Div. of Struct. Engrg., ASCE, 108(4), 929–950.
12.
Saatcioglu, M., and Razvi, S.(1992). “Strength and ductility of confined concrete.”J. Struct. Engrg., ASCE, 118(6), 1590–1607.
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 rate.”ACI J., 79(1), 13–27.
14.
Sheikh, S. A.(1982). “A comparative study of confinement models.”ACI J., 79(4), 296–306.
15.
Sheikh, S. A., and Uzumeri, S. M.(1982). “Analytical model for concrete confinement in tied columns.”J. Struct. Div., ASCE, 108(12), 2703–2722.
16.
Timoshenko, S. P., and Goodier, J. N. (1970). Theory of Elasticity, 3rd Ed., McGraw-Hill Book Co., Inc., New York, N.Y.
17.
Wei, S., Mau, S. T., Vipulanandan, C., and Mantrala, S. K.(1995). “Performance of a new sandwich tube under axial loading: analysis.”J. Struct. Engrg., ASCE, 121(12), 1815–1821.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 124 • Issue 3 • March 1998
Pages: 262 - 269
Copyright
Copyright © 1998 American Society of Civil Engineers.
History
Published online: Mar 1, 1998
Published in print: Mar 1998
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.