Torsional Capacity of CFRP Strengthened Reinforced Concrete Beams
Publication: Journal of Composites for Construction
Volume 11, Issue 1
Abstract
Many buildings and bridge elements are subjected to significant torsional moments that affect the design, and may require strengthening. Fiber-reinforced polymer (FRP) has shown great promise as a state-of-the-art material in flexural and shear strengthening as external reinforcement, but information on its applicability in torsional strengthening is limited. Furthermore, available design tools are sparse and unproven. This paper briefly recounts the experimental work in an overall investigation of torsional strengthening of solid and box-section reinforced concrete beams with externally bonded carbon fiber-reinforced polymer (CFRP). A database of previous experimental research available in literature was compiled and compared against fib Bulletin 14. Modifications consistent with the space truss model were proposed to correct the poor accuracy in predictions of CFRP contribution to strength. Subsequently, a design tool to analyze the full torsional capacity of strengthened reinforced concrete beams was validated against the experimental database.
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Acknowledgments
The research reported in this paper is part of a study financed by a Monash University Engineering Grant. All CFRP fabrics and adhesives were partly sponsored by MBT (Australia) Pty Ltd.
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Information
Published In
Journal of Composites for Construction
Volume 11 • Issue 1 • February 2007
Pages: 71 - 80
Copyright
© 2007 ASCE.
History
Received: Feb 24, 2006
Accepted: May 12, 2006
Published online: Feb 1, 2007
Published in print: Feb 2007
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