Flexural Strength of Continuous Reinforced Concrete Beams with Externally Bonded Carbon Fiber-Reinforced Polymer Reinforcement

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Title: Flexural Strength of Continuous Reinforced Concrete Beams with Externally Bonded Carbon Fiber-Reinforced Polymer Reinforcement

Author(s): S. A. El-Refaie, A. F. Ashour, and S. W. Garrity

Publication: Special Publication

Volume: 193

Issue:

Appears on pages(s): 959-978

Keywords: concrete; continuous beams; flexural strength; repair

Date: 8/1/2000

Abstract:
A numerical technique based on deformation compatibility and force equilibrium considerations is presented to predict the structural behaviour of continuous reinforced concrete beams strengthened with externally bonded carbon fibre reinforced polymer (CFRP) plates. Comparison between the behaviour predicted using the described method and experimental data shows good agreement. The technique was developed to predict hogging or sagging flexural failure in strengthened continuous beams but does not account for premature peeling failure. The influence of design variables such as the thickness, length and position of the external CFRP plates on the flexural capacity and the failure mode was also investigated. Increasing the external CFRP plate length decreases the probability of obtaining flexural failure next to the CFRP plate ends.