Eliminating premature end peeling of flexurally strengthened reinforced concrete beams

Alam, M.A. and Jumaat, Mohd Zamin (2009) Eliminating premature end peeling of flexurally strengthened reinforced concrete beams. Journal of Applied Sciences, 9 (6). pp. 1106-1113. ISSN 18125654, DOI https://doi.org/10.3923/jas.2009.1106.1113.

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This study presents the results of an experimental study investigating the effect of U-shaped end anchors on flexurally strengthened reinforced concrete beams for the prevention of premature end peeling. A simple design guideline for the anchorage length of end anchor is proposed. A total of five beams, each 2300 mm long, 125 mm wide and 250 mm deep with a tension steel reinforcement ratio of 0.73, was cast and tested. One beam was left un-strengthened and used as a control, two beams were strengthened with steel plates and the remaining two beams were strengthened with Carbon Fibre Reinforced Polymer (CFRP) laminates. One each of the steel plate and CFRP laminate strengthened beams were further strengthened with mild steel U-shape end-anchors at both ends of the beams. The beams were then tested under two-point loading. The experimental results revealed that the U-shaped end anchors of designed anchorage length eliminated premature end peeling and it had significant effects on the failure mode, ultimate load, deflections and strain characteristics of the strengthened beams. It is seen from the results that the end-anchored strengthened beams showed higher ultimate load and more ductile behaviour compared to the un-anchored strengthened beams.

Item Type: Article
Additional Information: Cited By (since 1996): 3 Export Date: 6 January 2013 Source: Scopus Language of Original Document: English Correspondence Address: Alam, M. A.; Department of Civil Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia References: Chahrour, A., Soudki, K., Flexural response of reinforced concrete beans strengthened with end-anchored partially bonded carbon fiher-reinforced polymer strips (2005) J. Comp. Construct. ASCE., 9, pp. 170-178; Garden, H.N., Flollaway, L.C., An experimental study of the influence of plate end anchorage of carbon fibre composite plates used to strengthen reinforced concrete beams (1998) Comp. Strict., 42, pp. 175-188; Hussain, M., Sharif, A., Basunhul, A., Baluch, M.H., Al-Aulaimani, G.J., Flexural behavior of precracked reinforced concrete beams strengthened externally by steel plates (1995) ACI Strict. J., 92, pp. I4-22; Jansze, W., Uijl, J.A.D., Walraven, J.C., Flexural strengthening with externally bonded steel plates: Design for beam shear and plate anchorage (1998) Challenges for Concrete in the Next Millennium, , Stoelhorst. D. and G.L. Boer Den (Eds); Jones, R., Swam, R.N., Charif, A., Plate separation and anchorage of reinforced concrete beams strengthened by epoxy-bonded steel plates (1988) Struct. Eng., 66, pp. 85-94; Oehlers, D.J., Moran, J.P., Premature failure of external plated reinforced concrete beams (1990) J. Struct. Eng. (ASCE), 116, pp. 978-995; Oh, B.H., Cho, J.Y., Park, D.G., Failure behaviour and separation criterion for strengthened concrete members with steel plates (2003) J. Struct. Eng. ASCE, 129, pp. 1191-1198; Saadatmanesh, H., Malek, A.M., Design guidelines for flexural strengthening of RC beams with FRP plates (1998) J. Comp. Construct. ASCE, 2, pp. 158-164
Uncontrolled Keywords: CFRP, Debonding, Steel plate, U shape end anchorage.
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 14 May 2013 01:25
Last Modified: 05 Feb 2020 04:26
URI: http://eprints.um.edu.my/id/eprint/6083

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