Shear Strength of FRP RC Beams and One-Way Slabs without Stirrups
Publication: Journal of Composites for Construction
Volume 18, Issue 5
Abstract
Due to the complex mechanism of shear behavior, most current empirical methods do not physically simulate the shear behavior as seen in practice. These approaches, therefore, cannot be directly applied to accommodate advanced technologies such as in the use of fiber-reinforced polymer (FRP) or fiber-reinforced concrete. With FRP reinforcement widely used nowadays, there is a need for a mechanics-based approach to explain and simulate the shear failure mechanism. In this paper and from a mechanics-based segmental approach, a generic closed-form solution is derived for quantifying the shear capacity of RC beams and one-way slabs without stirrups and in theory with any type of reinforcement and concrete. The model is validated with 209 published shear tests of FRP-reinforced specimens with normal concrete and, to show the generic nature of the model, with a further 626 published shear tests on beams with steel reinforcement. The generic closed-form solution is further simplified to facilitate shear design. A comparison to the predictions made by design recommendations shows a reduction to different degrees in both mean and scatter of the measured-to-predicted shear strength ratio for the proposed approaches.
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Acknowledgments
The authors would like to acknowledge the support of the Australian Research Council ARC Discovery Project DP0985828 “A unified reinforced concrete model for flexure and shear.” The first author also thanks the China Scholarship Council for financial support.
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Journal of Composites for Construction
Volume 18 • Issue 5 • October 2014
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© 2014 American Society of Civil Engineers.
History
Received: Aug 21, 2013
Accepted: Jan 6, 2014
Published online: Feb 19, 2014
Discussion open until: Jul 19, 2014
Published in print: Oct 1, 2014
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