Seismic Retrofit of RC Circular Columns Using Prefabricated Composite Jacketing
Publication: Journal of Structural Engineering
Volume 123, Issue 10
Abstract
This paper describes experimental and theoretical studies on seismic retrofit of reinforced concrete circular columns with poor lap-splice details using prefabricated composite jacketing. Three 1:2 scale model columns have been tested. One column was tested under the condition of “as built” and two others were tested after being retrofitted using prefabricated composite jacketing. The as-built column suffered brittle failure due to the deterioration of lap-spliced longitudinal reinforcement without developing its flexural capacity or any ductility. The retrofitted columns showed significant improvement in seismic performance. The failed as-built column was retested after being repaired. The repaired column also demonstrated significant improvement in ductility. An analytical model, which takes into consideration the bond-slip deterioration of lap-spliced longitudinal bars, has been developed for seismic assessment and retrofit design.
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 and Commentary (ACI318-89/ACI418R-89). (1989). American Concrete Institute, Detroit, Mich.
2.
Chai, Y. H., Priestley, M. J. N., and Seible, F.(1991). “Seismic retrofit of circular bridge columns for enhancing flexural performance.”ACI Struct. J., 88(5), 572–584.
3.
Giuriani, E., Plizzari, G., and Schumm, C.(1991). “Role of stirrups and residual tensile strength of cracked concrete on bond.”J. Struct. Engrg., ASCE, 117(1), 1–18.
4.
“Loma Prieta earthquake reconnaissance report.” (1990). Earthquake Spectra, Earthquake Engineering Research Institute, Berkeley, Calif.
5.
Mander, J. B., Priestley, M. J. N., and Park, R.(1988). “Theoretical stress-strain model for confined concrete.”J. Struct. Engrg., 114(8), 1827–1849.
6.
Matsuda, T., Sato, H., Fujiwara, H., and Higashira, N. (1990). “Effect of carbon fiber reinforcement as a strengthening measure for reinforced concrete bridge piers.”Proc., 1st U.S.-Japan Workshop on Seismic Retrofit of Bridges.
7.
Popovics, S.(1973). “A numerical approach to the complete stress-strain curves for concrete.”Cement and Concrete Res., 3(5), 583–599.
8.
Preliminary reconnaissance report on the Hyogo-Ken Nanbu earthquake of January 17, 1995. (1995). Earthquake Engineering Research Institute, Berkeley, Calif.
9.
Priestley, M. J. N.(1987). “Damage of the I-5/I605 separator in the Whittier earthquake of October 1987.”Earthquake Spectra, 4(2), 389–405.
10.
Priestley, M. J. N., and Seible, F. (1991). “Seismic assessment and retrofit of bridges.”Struct. Sys. Res. Proj., Rep. No. SSRP-91/103, University of California at San Diego, Calif.
11.
Priestley, M. J. N., Seible, F., Xiao, Y., and Verma, R. (1994). “Steel jacket retrofit of squat RC bridge columns for enhanced shear strength. Part 1: Theoretical considerations and test design; and Part 2: Experimental results.”ACI Struct. J., 91(4), 394–405; and 91(5), 537–551.
12.
Saadatmanesh, H., Ehsani, M. R., and Li, M. W. (1994). “Strength and ductility of concrete columns externally reinforced with fiber composite straps.”ACI Struct. J., 434.
13.
Seible, F., and Priestley, M. J. N. (1993). “Retrofit of rectangular flexural columns with composite fiber jackets.”Proc., 2nd Annu. Seismic Res. Workshop.
14.
Seible, F., Hegemier, G. A., and Innamorato, D. (1995). “Developments in bridge column jacketing using advance composites.”Proc., Nat. Seismic Conf. on Bridges and Hwy., Federal Highway Administration and California Department of Transportation.
15.
“State-of-the-art report on bond under cyclic loads.” (1992). Report ACI 408.2R-92, American Concrete institute, Detroit, Mich.
16.
Xiao, Y., Priestley, M. J. N., and Seible, F.(1996). “Seismic assessment and retrofit of bridge column footings.”ACI Struct. J., 93(1), 79–94.
17.
Xiao, Y., Sakino, K., and Tomii, M. (1987). “Ultimate moment and mechanical behavior of reinforced concrete short circular columns confined in steel tube.”Trans. Japan Concrete Inst., 9, Tokyo, Japan, 389–396.
18.
Xiao, Y., Martin, G., Yin, Z., and Ma, R. (1995). Bridge column retrofit using snap-tite composite jacketing for improved seismic performance. Structural Engineering Research Program, University of Southern California, Los Angeles, Calif.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 123 • Issue 10 • October 1997
Pages: 1357 - 1364
Copyright
Copyright © 1997 American Society of Civil Engineers.
History
Published online: Oct 1, 1997
Published in print: Oct 1997
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.