Strength and Ductility of Concrete Beams Reinforced with Carbon Fiber-Reinforced Polymer Plates and Steel
Publication: Journal of Composites for Construction
Volume 8, Issue 1
Abstract
Seven concrete beams reinforced internally with varying amounts of steel and externally with precured carbon fiber-reinforced polymer (FRP) plates applied after the concrete had cracked under service loads were tested under four-point bending. Strains measured along the beam depth allowed computation of the beam curvature in the constant moment region. Results show that FRP is very effective for flexural strengthening. As the amount of steel increases, the additional strength provided by the carbon FRP plates decreases. Compared to a beam reinforced heavily with steel only, beams reinforced with both steel and carbon have adequate deformation capacity, in spite of their brittle mode of failure. Clamping or wrapping of the ends of the precured FRP plate enhances the capacity of adhesively bonded FRP anchorage. Design equations for anchorage, allowable stress, ductility, and amount of reinforcement are discussed.
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Information
Published In
Journal of Composites for Construction
Volume 8 • Issue 1 • February 2004
Pages: 59 - 69
Copyright
Copyright © 2004 American Society of Civil Engineers.
History
Received: Nov 7, 2001
Accepted: Sep 20, 2002
Published online: Jan 16, 2004
Published in print: Feb 2004
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