Strengthening and Repair of Reinforced Concrete Beams Using External Steel Plates
Publication: Journal of Structural Engineering
Volume 139, Issue 6
Abstract
The study presents the results of an experimental program aimed at investigating the flexural behavior of externally plated RC beams. A total of 13 full-scale rectangular RC beams were tested. The effects on the behavior of the plate thickness, the anchorage of the plate to the beam through anchor bolts or side plates (collars), and the use of perforated plates instead of solid ones were investigated. The experiments indicated that the beam ductility increases as the plate thickness decreases, and the anchorage of the plate to the beam through bolts or collars proves to be an efficient method for preventing the premature plate peeling failure and achieving sufficient ductility in beams strengthened with thick solid plates. Anchor bolts had adverse effects on the ductilities of the beams with thin plates, and the use of perforated steel plates was found to be an efficient method for increasing the ductility of a strengthened beam. The beams repaired with perforated plates anchored to the beam with collars had load-carrying capacities close to those of the undamaged beams.
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Acknowledgments
This paper represents a condensation of the theses prepared at Gazi University, Ankara, Turkey, by Mr. Sinan Kayar and Mr. Servet Karahan under the supervision of Dr. Sabahattin Aykac and Dr. Bengi Aykac toward the degree of Master of Science. The experiments were conducted at the Structural Mechanics Laboratory of Gazi University.
References
Altin, S., Anil, O., and Kara, M. E. (2005). “Improving shear capacity of existing RC beams using external bonding of steel plates.” Eng. Structures, 27(5), 781–791.
American Concrete Institute (ACI). (2011). “Metric building code requirements for structural concrete and commentary.” ACI 318M-11, Farmington Hills, MI.
Arslan, G., Sevuk, F., and Ekiz, I. (2008). “Steel plate contribution to load-carrying capacity of retrofitted RC beams.” Construct. Build. Mater., 22(3), 143–153.
ASTM. (2007). “Standard test methods and definitions for mechanical testing of steel products.” A370-07b, West Conshohocken, PA.
Aykac, S., and Ozbek, E. (2011). “Strengthening of reinforced concrete T-beams with steel plates.” Tech. J. Turk. Chamber Civ. Eng., 22(1), 5319–5334 (in Turkish).
Barnes, R. A., and Mays, G. C. (2006a). “Strengthening of reinforced concrete beams in shear by the use of externally bonded steel plates: Part 1—Experimental programme.” Construct. Build. Mater., 20(6), 396–402.
Barnes, R. A., and Mays, G. C. (2006b). “Strengthening of reinforced concrete beams in shear by the use of externally bonded steel plates: Part 2—Design guidelines.” Construct. Build. Mater., 20(6), 403–411.
Harajli, M. H., and Hijazi, S. A. (1991). “Evaluation of the ultimate steel stress in partially prestressed concrete members.” PCI J., 36(1), 62–82.
Hussain, M., Sharif, A., Basunbul, I. A., Baluch, M. H., and Al-Sulaimani, G. J. (1995). “Flexural behavior of precracked reinforced concrete beams strengthened externally by steel plates.” ACI Struct. J., 92(1), 14–22.
Kheyroddin, A., and Naderpour, H. (2007). “Plastic hinge rotation capacity of reinforced concrete beams.” Int. J. Civ. Eng., 5(1), 30–47.
Leung, C. K. Y. (2001). “Delamination failure in concrete beams retrofitted with a bonded plate.” J. Mater. Civ. Eng., 13(2), 106–113.
L’Hermite, R., and Bresson, J. (1967). “Concrete reinforced with glued plates.” Proc., RILEM Int. Symp. Synthetic Resins in Building Construction, Eyrolles, Paris, 175–203.
Oehlers, D. J. (1992). “Reinforced concrete beams with plates glued to their soffits.” J. Struct. Eng., 118(8), 2023–2038.
Oehlers, D. J., and Moran, J. P. (1990). “Premature failure of externally plated reinforced concrete beams.” J. Struct. Eng., 116(4), 978–995.
Raoof, M., El-Rimawi, J. A., and Hassanen, M. A. H. (2000). “Theoretical and experimental study on externally plated R.C. beams.” Eng. Structures, 22(1), 85–101.
Raoof, M., and Zhang, S. (1997). “An insight into the structural behavior of R.C. beams with externally bonded plates.” Proc. ICE Struct. Build., 122(4), 477–492.
Saba, A. M., Sallam, H. E. M., Shaheen, H. H., and Abdel-Raouf, H. (2003). “Effect of plate end anchorage and side plates on the efficiency of plated beams.” Al-Azhar Univ. Eng. J., 6(1), 555–564.
Sallam, H. E. M., Saba, A. M., Shahin, H. H., and Abdel-Raouf, H. (2004). “Prevention of peeling failure in plated beams.” J. Adv. Concr. Technol., 2(3), 419–429.
Su, R. K. L., and Zhu, Y. (2005). “Experimental and numerical studies of external steel plate strengthened reinforced concrete coupling beams.” Eng. Structures, 27(10), 1537–1550.
Tankut, T., and Arslan, M. (1992). “Behaviour of reinforced concrete beams strengthened by epoxy-bonded steel plates.” Tech. J. Turk. Chamber Civ. Eng., 92(Digest), 176–185.
Todeschini, C. E., Bianchini, A. C., and Kesler, C. E. (1964). “Behavior of concrete columns reinforced with high strength steels.” ACI J. Proc., 61(6), 701–716.
Uysal, A. (2006). “Strengthening of reinforced concrete beams by epoxy glued steel plates.” M.S. thesis, Gazi Univ., Ankara, Turkey.
Ziraba, Y. N., Baluch, M. H., Basunbul, I. A., Sharif, A. M., Azad, A. K., and Al-Sulaimani, G. J. (1994). “Guidelines toward the design of reinforced concrete beams with external plates.” ACI Struct. J., 91(6), 639–646.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 139 • Issue 6 • June 2013
Pages: 929 - 939
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Dec 27, 2011
Accepted: Aug 30, 2012
Published online: Sep 3, 2012
Published in print: Jun 1, 2013
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