Transverse Reinforcement for Columns of RC Frames to Resist Earthquakes
Publication: Journal of Structural Engineering
Volume 126, Issue 4
Abstract
An approximate formulation to determine the amount of transverse reinforcement for columns of reinforced concrete (RC) frames in seismic areas is presented. It is based on observations that suggested that the main function of transverse reinforcement is to confine the core subjected to a complex state of stress rather than simply resist shear or improve deformability under axial compression. The combined effects of shear and axial stresses are assumed to be a function of the maximum drift ratio and they are interpreted using Coulomb's failure criterion. A comparison between results obtained with the model developed and current design recommendations suggests that the required amount of transverse reinforcement specified in ACI 318-95 can be reduced safely for “flexible” columns (ratio of column height to effective depth ≅6) under low amplitude displacement cycles (ratio of lateral displacement to column height ≤3%) and “short” columns (ratio of column height to effective depth ≅4) under combinations of relatively low shear and axial stresses.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Ang, B. G., Priestley, M. J. N., and Paulay, T. (1989). “Seismic shear strength of circular concrete columns.” ACI Struct. J., 86(1), 45–59.
2.
Blume, J. A., Newmark, N. M., and Corning, L. H. (1961). Design of multistory reinforced concrete buildings for earthquake motions. Portland Cement Association, Skokie, Ill.
3.
“Building code requirements for structural concrete.” (1995). ACI 318-95, American Concrete Institute, Farmington Hills, Mich.
4.
Considère, A. ( 1903). “Résistance à la Compression du Béton Armé and du Béton Fretté.” Génie Civil, France (in French).
5.
Coulomb, C. A. (1773). “Essai sur une Application des Règles de Maximis et Minimis à quelques Problèmes de Statique Relatifs à l'Architecture.” Proc., l'Académie Royale des Sciences par divers savans, et lûs dans ses assemblées, Mémoires de Mathématique et de Physique, Vol. 7, 343–382 (in French).
6.
Ohue, M., Morimoto, H., Fujii, S., and Morita, S. (1985). “The behavior of R.C. short columns failing in splitting bond shear under dynamic lateral loading.” Trans. Japan Concrete Inst., Tokyo, 7, 293–300.
7.
Ono, A., Shirai, N., Adachi, H., and Sakamaki, Y. (1989). “Elasto-plastic behavior of reinforced concrete column with fluctuating axial force.” Trans. Japan Concrete Inst., Tokyo, 11, 239–246.
8.
Pujol, S. ( 1997). “Drift capacity of reinforced concrete columns,” MS thesis, Dept. of Civ. Engrg., Purdue University, West Lafayette, Ind.
9.
Richart, F. E., Brandtzaeg, A., and Brown, R. L. ( 1929). “The failure of plain and spirally reinforced concrete in compression.” Bull. No. 190, University of Illinois Engrg. Experiment Station, 26(31), 52.
10.
Richart, F. E., and Brown, R. L. ( 1934). “A study of reinforced concrete columns.” Bull. No. 267, University of Illinois Engrg. Experiment Station, June.
11.
Saatcioglu, M., and Ozcebe, G. (1989). “Response of reinforced concrete columns to simulated seismic loading.” ACI Struct. J., 86(1), 3–12.
12.
Sakai, Y., Hibi, J., Otani, S., and Aoyama, H. (1990). “Experimental study on flexural behavior of reinforced concrete columns using high strength concrete.” Trans. Japan Concrete Inst., Tokyo, 12, 323–330.
13.
Wight, J. K., and Sozen, M. A. ( 1973). “Shear strength decay in reinforced concrete columns subjected to large deflection reversals.” Struct. Res. Ser. No. 403, University of Illinois at Urbana-Champaign, Ill.
14.
Wong, Y. L., Paulay, T., and Priestley, M. J. N. (1993). “Response of circular reinforced concrete columns to multi-directional seismic attack.” ACI Struct. J., 90(2), 180–191.
15.
Xiao, Y., and Martirossyan, A. (1998). “Seismic performance of high-strength concrete columns.”J. Struct. Engrg., ASCE, 124(3), 241–251.
Information & Authors
Information
Published In
History
Received: Mar 2, 1999
Published online: Apr 1, 2000
Published in print: Apr 2000
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.