Bond Studies of High-Strength Concrete Joints Confined with Stirrups, Steel Fibers, or Fiber-Reinforced Polymer Sheets
Publication: Journal of Structural Engineering
Volume 142, Issue 1
Abstract
The paper presents a correlation study of the results of three research programs conducted on hooked bars anchored in high-strength concrete (HSC) beam-column joints at the American University of Beirut (AUB). The specimen simulated the rigid connection of a cantilever beam to a column. In two previous programs, the beam-column joint was confined either externally with carbon fiber–reinforced polymer (CFRP) sheets or internally by steel fibers incorporated in the concrete mix. Although stirrups were included in the beam and column elements of the specimens of the two programs, the column stirrups were not extended in the beam-column joint. It was necessary to conduct a third program where confinement of the joint was provided internally by stirrups crossing the critical hooked bars region. Results of the three programs indicated positive effect of the different confining modes on bond strength of the anchored bars and ductility of the load-deflection history. Comparison of the results of the three programs is presented.
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Acknowledgments
The authors gratefully acknowledge Hussein Mallat, Professor Hamad’s graduate student at AUB, who was working on his M.S. degree when he had to leave for the United States for cancer treatment and was out of reach during the preparation of the paper. Also, the authors acknowledge the University Research Board at the American University of Beirut for supporting this program.
References
Abbas, A., Syed Mohsin, S., and Cotsovos, D. (2014). “Seismic response of steel fibre reinforced concrete beam-column joints.” Eng. Struct. J., 59, 261–283.
ACI (American Concrete Institute). (2011). “Building code requirements for reinforced concrete and commentary.”, Farmington Hills, MI.
Anbuvelan, K., and Subramanian, K. (2014). “Behavior of high performance steel fiber reinforced concrete in exterior beam-column joint—A general review.” Aust. J. Basic Appl. Sci., 8(7), 215–219.
Antonopoulos, C. P., and Triantafillou, T. C. (2003). “Experimental investigation of FRP-strengthened RC beam-column joints.” J. Compos. Constr., 39–49.
ASTM. (2006). “Standard specification for steel fibers for fiber-reinforced concrete.”, West Conshohocken, PA.
ASTM. (2009). “Standard specification for deformed and plain carbon-steel bars for concrete reinforcement.”, West Conshohocken, PA.
Darwin, D., Zuo, J., Tholen, M. L., and Idun, E. K. (1996). “Development length criteria for conventional and high relative area reinforcing bars.” ACI Struct. J., 93(3), 347–359.
El-Amoury, T., and Ghobarah, A. (2002). “Seismic rehabilitation of beam-column joint using GFRP sheets.” Elsevier Eng. Struct. J., 24(11), 1397–1407.
Ganesan, N., Indira, P. V., and Abraham, R. (2007). “Steel fibre reinforced high performance concrete beam-column joints subjected to cyclic loading.” ISET J. Earthquake Technol., 44(3–4), 445–456.
Gencoglu, M., and Eren, I. (2002). “An experimental study on the effect of steel fiber reinforced concrete on the behavior of the exterior beam-column joints subjected to reversal cyclic loading.” Turk. J. Eng. Environ. Sci., 26, 493–502.
Hamad, B., and Abou Haidar, E. (2011). “Effect of steel fibers on bond strength of hooked bars in high strength concrete.” J. Mater. Civ. Eng., 673–681.
Hamad, B., and Bou Abs, C. (2009). “Effect of FRP confinement on bond strength of hooked bars in high strength concrete.” ACI Struct. J., 106(6), 831–839.
Kent, D. C., and Park, R. (1971). “Flexural members with confined concrete.” J. Struct. Div., 97(ST7), 1969–1990.
Lee, W. T., Chiou, Y. J., and Shih, M. H. (2010). “Reinforced concrete beam-column joint strengthened with carbon fiber reinforced polymer.” Compos. Struct. J., 92(1), 48–60.
Li, B., and Grace Chua, H. Y. (2009). “Seismic performance of strengthened reinforced concrete beam-column joints using FRP composites.” J. Struct. Eng., 1177–1190.
Park, R., and Paulay, T. (1975). Reinforced concrete structures, Wiley, New York.
Scott, B. D., Park, R., and Priestly, M. N. (1982). “Stress–strain behavior of concrete confined by overlapping hoops at low and high strain rates.” ACI Struct. J., 79(1), 13–27.
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Published In
Journal of Structural Engineering
Volume 142 • Issue 1 • January 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Sep 27, 2014
Accepted: Apr 28, 2015
Published online: Jul 6, 2015
Discussion open until: Dec 6, 2015
Published in print: Jan 1, 2016
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