Rational Approach to Shear Design in Fiber-Reinforced Polymer-Prestressed Concrete Structures
Publication: Journal of Composites for Construction
Volume 9, Issue 1
Abstract
The use of plasticity-based shear design methods for fiber-reinforced polymer (FRP) reinforced and prestressed concrete, as they are used at present, is inappropriate in the long term. In particular, the use of a plasticity-based truss model for shear behavior seems to be unsound, as reliance is placed on a predominantly elastic zone to redistribute stresses. A better approach to shear design would be to employ a model incorporating force equilibrium and compatibility of strains so that the elastic properties of the FRP could be included rationally. This would help to develop a real understanding and form a basis on which new guides and codes could be founded. In tandem with a more rational analytical approach, new configurations and types of FRP reinforcement need to be developed and researched so that these materials can be used more efficiently. An analytical approach to investigate the shear response of FRP-reinforced and -prestressed concrete has been developed, based on equilibrium and compatibility across a shear discontinuity. The analytical model presented here was developed in conjunction with an experimental program. Correlation between the analytical and experimental results is good and more accurate than the current guideline provisions for concrete beams containing FRP reinforcement.
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Acknowledgments
The writers would like to thank the Engineering and Physical Sciences Research Council (EPSRC) for the financial support to conduct this research project. The writers are also grateful to the technical staff at the University of Bath for their help. Finally, the writers would like to thank Sireg S.p.A. for their continued generous supply of FRP materials for such research.
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Information
Published In
Journal of Composites for Construction
Volume 9 • Issue 1 • February 2005
Pages: 90 - 100
Copyright
© 2005 ASCE.
History
Received: Jul 29, 2003
Accepted: Nov 25, 2003
Published online: Feb 1, 2005
Published in print: Feb 2005
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