Confinement Effectiveness of crossties in RC
Publication: Journal of Structural Engineering
Volume 111, Issue 10
Abstract
An experimental study is made of confinement effectiveness of crossties in reinforced concrete columns subjected to monotonically increasing axial compression. Ten columns were constructed, of which eight were reinforced. The main variable was the type of transverse reinforcement. Comparison is made between strength and ductility obtained by the different types of transverse steel, and analytical moment‐curvature studies are used to estimate the influence of different confined concrete behaviors on flexural behavior of columns and structural walls. It is observed that crossties having 180° hooks are as effective in confining concrete as intermediate hoops. Crossties having 135° and 90° hooks are nearly as effective. It is concluded that both types of crossties are acceptable details for confinement of concrete where large inelastic strains will be applied monotonically.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
“Building Code Requirements for Reinforced Concrete (ACI 318‐83),” ACI Committee 318, American Concrete Institute, Detroit, Mich., 1983, 111 pp.
2.
Fiorato, A. E., Oesterle, R. G., and Corley, W. G., “Behavior of Earthquake Resistant Structural Walls Before and After Repair,” Journal of the American Concrete Institute, Vol. 80, Sept.—Oct., 1983, pp. 403–413.
3.
Hanson, N. W., and Rabbat, B. G., “Tests of Ductile Behavior of Lightweight Concrete Columns for Seismic Design,” ProceedingsVol. 6, Eighth World Conference on Earthquake Engineering, San Francisco, Calif., July 21–28, 1984, pp. 545–552.
4.
Kent, D. C., and Park, R., “Flexural Members with Confined Concrete,” Journal of the Structural Division, ASCE, Vol. 97, No. ST7, July, 1971, pp. 1969–1990.
5.
Manrique, M. A., Bertero, V. V., and Popov, E. P., “Mechanical Behavior of Lightweight Concrete Confined by Different Types of Lateral Reinforcement,” Report No. UBC/EERC‐70/05, Earthquake Engineering Research Center, University of California, Berkeley, Calif., May, 1979, 103 pp.
6.
Park, R., Priestly, M. J. N., and Gill, W. D., “Ductility of Square‐Confined Concrete Columns,” Journal of the Structural Division, ASCE, Vol. 108, No. ST4, Apr., 1982, pp. 929–950.
7.
Roy, H. E. H., and Sozen, M. A., “Ductility of Concrete,” Flexural Mechanics of Reinforced Concrete, SP‐12, American Concrete Institute/American Society of Civil Engineers, Detroit, Mich., 1965, pp. 213–224.
8.
Scott, B. D., Park, R., and Priestly, M. J. N., “Stress‐Strain Behavior of Concrete Confined by Overlapping Hoops at Low and High Strain Rates,” Journal of the American Concrete Institute, Vol. 79, Jan.—Feb., 1982, pp. 13–27.
9.
Shah, S. P., Fafitis, A., and Arnold, R., “Cyclic Loading of Spirally Reinforced Concrete,” Journal of Structural Engineering, ASCE, Vol. 109, No. 7, July, 1983, pp. 1695–1710.
10.
Sheikh, S. A., “A Comparative Study of Confinement Models,” Journal of the American Concrete Institute, Vol. 79, July—Aug., 1982, pp. 296–306.
11.
Sheikh, S. A., and Uzumeri, S. M., “Analytical Model for Concrete Confinement in Tied Columns,” Journal of the Structural Division, ASCE, Vol. 108, No. ST12, Dec., 1982, pp. 2703–2722.
12.
Sheikh, S. A., and Uzumeri, S. M., “Strength and Ductility of Tied Concrete Columns,” Journal of the Structural Division, ASCE, Vol. 106, No. ST5, May, 1980, pp. 1079–1102.
13.
Uniform Building Code, International Conference of Building Officials, Whittier, Calif., 1982, 780 pp.
14.
Vallenas, J., Bertero, V. V., and Popov, E. P., “Concrete Confined by Rectangular Hoops and Subjected To Axial Loads,” Report No. UCB/EERC‐77/13, Earthquake Engineering Research Center, University of California, Berkeley, Calif., Aug., 1977, 114 pp.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 111 • Issue 10 • October 1985
Pages: 2105 - 2120
Copyright
Copyright © 1985 ASCE.
History
Published online: Oct 1, 1985
Published in print: Oct 1985
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.