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Size of FRP laminates to strengthen reinforced concrete sections in flexure.
Publication Date
2002-08
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© 2002 ICE. Reproduced in accordance with the publisher's self-archiving policy.
Peer-Reviewed
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Open Access status
openAccess
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Department
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Abstract
This paper presents an analytical method for estimating the flexural strength of reinforced concrete beams strengthened with externally bonded fibre reinforced polymer (FRP) laminates. The method is developed from the strain compatibility and equilibrium of forces. Based on the size of external FRP laminates, several flexural failure modes may be identified, namely tensile rupture of FRP laminates and concrete crushing before or after yielding of internal steel reinforcement. Upper and lower limits to the size of FRP laminates used are suggested to maintain ductile behaviour of strengthened reinforced concrete sections. Comparisons between the flexural strength obtained from the current method and experiments show good agreement. Design equations for calculating the size of FRP laminates externally bonded to reinforced concrete sections to enhance their flexural strength are proposed.
Version
Accepted manuscript
Citation
Ashour, A. F. (2002) Size of FRP laminates to strengthen reinforced concrete sections in flexure. Structures and Buildings Journal, Proceedings of the Institution of Civil Engineers, Vol. 152, No. 3, pp. 225-233.
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Article