Flexure of Reinforced Concrete Beams Externally Strengthened by Epoxy Bonded Steel Plates with Anchored Bolts
Article Sidebar
Main Article Content
Abstract
An extension of the previous work on strengthening in flexure of reinforced concrete beams by external bonding of steel plates with epoxy-resin adhesive to the concrete tension face and providing additional mechanical anchorages at the ends and intermediate of steel plate is conducted and presented in the paper. A total of 14 beams having the same overall dimensions are cast-in-place using ready mixed concrete for the experiments. The internal steel reinforcement and steel plate quantities used are the same to that of the previous. The difference is only the concrete compressive strength. All of the beams have been tested until the beams failed under the four-point bending test. The objectives are thus to study the effects of concrete strength on load carrying capacity and deflection behavior of strengthened beams including the mode of failures. The parameters of interesting are involved with the steel plate thickness, type of internal reinforcing steel bars on beam sections, and position arrangement of mechanical anchorages. The cracking load, yielding load, debonding load, and ultimate load are determined experimentally and theoretically.
Article Details
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright @2021 Engineering Transactions
Faculty of Engineering and Technology
Mahanakorn University of Technology
References
J.C. McCormac, Design of Reinforced Concrete. 5th ed. New York, NY, USA: John Wiley & Sons Inc., 2001.
D.J. Oehlers and M.A. Bradford, Elementary Behaviour of Composite Steel and Concrete Structural Members. Oxford, UK: Butterworth-Heinemann, 1999.
L.C. Hollaway and M.B. Leeming, Strengthening of Reinforced Concrete Structures: Using Externally-Bonded FRP Composites in Structural and Civil Engineering. Cambridge, MA, USA: Woodhead Publishing, 2001.
D.K. Eberline, F.W. Klaiber, and K. Dunker, “Bridge strengthening with epoxy-bonded steel plates,” Transp. Res. Rec., vol. 1180, pp. 7-11, 1988.
S. Zhang, M. Raoof, and L.A. Wood, “Prediction of peeling failure of reinforced concrete beams with externally bonded steel plates,” Proc. Inst. Civ. Eng. Struct. Build, vol. 110, no. 3, pp. 257-268, Aug. 1995.
B.B. Adhikary and H. Mutsuyoshi, “Numerical simulation of steel-plate strengthened concrete beam by a non-linear finite element method model,” Constr. Build. Mater., vol. 16, no. 5, pp. 291-301, Jul. 2002.
M.Z. Jumaat and M.A. Alam, “Plate bonded strengthened R.C. beams with end and intermediate anchors,” Int. J. Eng. Technol., vol. 4, no. 2, pp. 185-193, 2007.
M.Z. Jumaat and M.A. Alam, “Experimental and analytical investigations on the structural behaviour of steel plate and CFRP laminate flexurally strengthened reinforced concrete beams,” J. Appl. Sci., vol. 8, no. 23, pp. 4383-4389, Nov. 2008.
A. Bashandy, “Flexural strengthening of reinforced concrete beams using valid strengthening techniques,” Arch. Civ. Eng., vol. 59, no. 3, pp. 275-293, Sep. 2013.
H.M. Al-Hassani, S.A. Al-Ta’an, and A.A. Mohammed, “Behavior of damaged reinforced concrete beams strengthened with externally bonded steel plate,” Tikrit J. Eng. Sci., vol. 20, no. 2, 48-59, Mar. 2013.
C. Czaderski and U. Meier, “EBR strengthening technique for concrete long-term behaviour and historical survey,” Polymers, vol. 10, no.1, Jan. 2018, Art. no. polym10010077.
Z. Yannian, X. Jun, and W. Liu, “Experimental study on RC T-section beams strengthened with bottom steel plates,” Jordan J. Civ. Eng., vol. 12, no. 3, pp. 502-515, Jan. 2018.
Y.G. Abtan, “Effective length and area of bolted steel plates attached externally to strengthen reinforced concrete beams,” IOP Conf. Ser.: Mater. Sci. Eng., vol. 737, no. 1, Mar. 2020, Art. no. 012012.
T. Theeraket, V. Tovarapong, P. Posayanant, P. Chantarawichit, D. Dy, and Y. Sompornjaroensuk, “Behavior of reinforced concrete beams strengthened by epoxy bonded and bolted steel plates,” Engineering Transactions, vol. 25, no. 2 (53), pp. 110-121, July-Dec. 2022 (in Thai).
A.I. Al-Negheimish, A.K. El-Sayed, M.A. Al-Saawani, and A.M. Alhozaimy, “Effect of stirrups on plate end debonding in reinforced concrete beams strengthened with fiber reinforced polymers,” Polymers, vol. 13, no. 19, Sep. 2021, Art. no. polym13193322