Behavior of FRP Jacketed Concrete Columns under Eccentric Loading
Publication: Journal of Composites for Construction
Volume 5, Issue 3
Abstract
This paper describes a study on the behavior of fiber-reinforced polymer (FRP) jacketed square concrete columns subjected to eccentric loading. The effect of strain gradient on the behavior of concrete columns confined by the FRP jacket was investigated through experimental and numerical analysis methods. Nine (108 × 108 × 305 mm) square concrete column stubs with zero, one, and two plies of unidirectional carbon FRP fabric were tested under axial compressive loading. In addition to the FRP jacket thickness, the effects of various eccentricities were examined. The nonlinear finite-element analysis results were compared and validated against the experimental test results. The results show that the FRP jacket can greatly enhance the strength and ductility of concrete columns under eccentric loading and that the strain gradient reduces the retrofit efficiency of the FRP jacket for concrete columns. Therefore, a smaller enhancement factor should be used in designing FRP-jacketed columns under eccentric loading. Furthermore, the nonlinear finite-element models established in this study can be used as templates for future research work on FRP-confined concrete columns.
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References
1.
Chai, Y. H., Priestley, M. J. N., and Seible, F. (1994). “Analytical model for steel-jacketed RC circular bridge columns.”J. Struct. Engrg., ASCE, 120(8), 2358–2376.
2.
Demers, M., Hebert, D., Gauthier, M., Labossiere, P., and Neale, K. W. ( 1996). “The strengthening of structural concrete with an aramid woven fibre/epoxy resin composite.” Proc., Advanced Compos. Mat. in Bridges and Struct. II, Canadian Society of Civil Engineering, Ottawa, 435–442.
3.
Fyfe, E. R. ( 1995). “Testing and field performance of the high strength fiber wrapping system.” Restructuring: America and Beyond: Proc., Struct. Congress XIII, ASCE, New York, 603–606.
4.
Harries, K. A., Kestner, J., Pessiki, S., Sause, R., and Ricles, J. ( 1998). “Axial behavior of reinforced concrete columns retrofit with FRPC jackets.” Proc., 2nd Int. Conf. on Compos. in Infrastruct., University of Arizona, Tucson, Ariz., 411–425.
5.
Howie, I., and Karbhari, V. M. ( 1994). “Effect of materials architecture on strengthening efficiency of composite wraps for deteriorating columns in the north-east.” Infrastruct.: New Mat. and Methods of Repair—Proc., 3rd Mat. Engrg. Conf., ASCE, New York, 199–206.
6.
Karabinis, A. I., and Kiousis, P. D. (1994). “Effects of confinement on concrete columns: plasticity approach.”J. Struct. Engrg., ASCE, 120(9), 2747–2767.
7.
Karbhari, V. M., and Eckel, D. A., II (1994). “Effect of cold regions climate on composite jacketed concrete columns.”J. Cold Reg. Engrg., ASCE, 8(3), 73–86.
8.
Karbhari, V. M., and Gao, Y. (1997). “Composite jacketed concrete under uniaxial compression—verification of simple design equations.”J. Mat. in Civ. Engrg., ASCE, 9(4), 185–193.
9.
Mander, J. B., Priestley, M. J. N., and Park, R. (1988). “Theoretical stress-strain model for confined concrete.”J. Struct. Engrg., ASCE, 114(8), 1804–1826.
10.
MARC users guide. (1994). MARC Analysis Research, Palo Alto, Calif.
11.
Mirmiran, A., and Shahawy, M. ( 1996). “A new concrete-filled hollow FRP composite column.” Compos.: Part B Engrg. J. 27B, Oxford, U.K., 263–268.
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., 91(4), 433–447.
13.
Toutanji, H., and Balaguru, P. (1998). “Durability characteristics of concrete columns wrapped with FRP tow sheets.”J. Mat. in Civ. Engrg., ASCE, 10(1), 52–57.
14.
Whitney, J. M., Daniel, I. M., and Pipes, R. B. ( 1982). “Experimental mechanics of fiber reinforced composite materials.” Monograph No. 4, Society for Experimental Stress Analysis, Brookfield Center, Conn.
Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 5 • Issue 3 • August 2001
Pages: 146 - 152
History
Received: Sep 9, 1999
Published online: Aug 1, 2001
Published in print: Aug 2001
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