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Sagging and hogging strengthening of continuous reinforced concrete beams using CFRP sheets.
El-Refaie, S.A. Garrity, S.W.
El-Refaie, S.A.
Garrity, S.W.
Publication Date
2003-07
End of Embargo
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© 2003 ACI. Reproduced in accordance with the publisher's self-archiving policy.
Peer-Reviewed
Yes
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openAccess
Accepted for publication
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Department
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Abstract
This paper reports the testing of 11 reinforced concrete (RC) two-span beams strengthened in flexure with externally bonded carbon fiber-reinforced polymer (CFRP) sheets. The beams were classified into two groups according to the arrangement of the internal steel reinforcement. Each group included one unstrengthened control beam. The main parameters studied were the position, length, and number of CFRP layers. External strengthening using CFRP sheets was found to increase the beam load capacity. All strengthened beams exhibited less ductility compared with the unstrengthened control beams, however, and showed undesirable sudden failure modes. There was an optimum number of CFRP layers beyond which there was no further enhancement in the beam capacity. Extending the CFRP sheet length to cover the entire hogging or sagging zones did not prevent peeling failure of the CFRP sheets, which was the dominant failure mode of beams tested.
Version
Accepted manuscript
Citation
El-Refaie, S. A., Ashour, A. F. and Garrity, S. W. (2003) Sagging and hogging strengthening of continuous reinforced concrete beams using CFRP sheets. ACI Structural Journal, 100 (4): 446-453.
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Article