Prediction of bond failure and deflection of carbon fiber-reinforced plastic reinforced concrete beams |
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Authors: | A Maji A L Orozco |
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Institution: | (1) Department of Civil Engineering, University of New Mexico, 87131-1351 Albuquerque, NM, USA;(2) Facultad de Ingenieria, Universidad Autonoma de Chihuahua, Apartado Postal 1528 Suc. C, Chihuahua, Chihuahua, Mexico |
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Abstract: | Carbon fiber-reinforced plastic (CFRP) reinforced concrete beams can fail due to interface debonding, due to the high tensile
strength of such rebars. A set of 16 concrete beams reinforced with different amounts of CFRP reinforcement was subject to
static three-point bending. The beam dimensions and CFRP reinforcements used were selected to demonstrate a transition from
compression failure to bond failure with decreasing reinforcement ratio. It is shown that accurate bond strength data to predict
such failures can be obtained from a “hinged-beam” test configuration, rather than the conventional direct “pull-out” tests.
Deflection under service loads can also be predicted more accurately using a proposed equation that includes the reinforcement
ratio and the elastic modulus of the reinforcement. |
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Keywords: | Bond slip deflections pull-out failure strength |
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