Sagging and hogging strengthening of continuous reinforced concrete beams using CFRP sheets.

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2003-07Keyword
Reinforced concreteReinforced concrete
Continuous beams
Carbon fiber reinforced polymer (CFRP) sheets
Strengthening
Deflection
Capacity
Reaction
Strains
Moment redistribution
Ductility
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© 2003 ACI. Reproduced in accordance with the publisher's self-archiving policy.Peer-Reviewed
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openAccess
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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 manuscriptCitation
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.Link to Version of Record
https://doi.org/10.14359/12653Type
Articleae974a485f413a2113503eed53cd6c53
https://doi.org/10.14359/12653