Shear Behavior of Variable-Depth Concrete Beams with Wound Fiber–Reinforced Polymer Shear Reinforcement
Publication: Journal of Composites for Construction
Volume 22, Issue 6
Abstract
A novel shear reinforcing system, wound fiber–reinforced polymer (W-FRP), that capitalizes on the flexibility of carbon fiber to create durable reinforcement cages for geometrically optimized concrete structures, is proposed thereby unlocking new potential to minimize carbon emissions associated with new concrete structures. Fiber-reinforced polymer (FRP) shear design methods have been extensively validated against prismatic beam tests, but variations in geometry have not yet been considered. This paper proposes revised design methods, validated using tests of eight W-FRP–reinforced variable-depth concrete beams, to examine the contributing factors to shear capacity. The corner strength, orientation, and compression concrete confinement provided by W-FRP links, along with the contribution to shear of longitudinal bars, are shown to be key design parameters. Optimizing the W-FRP pattern is found to enhance shear capacity by as much as 50%. The variable-depth geometry tested in this paper uses 19% less concrete than an equivalent-strength prismatic beam. Both reinforcement and geometry optimizations are the key steps toward achieving minimal material use for concrete structures.
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Data Availability Statement
All data created during this research are openly available from the University of Bath data archive: https://doi.org/10.15125/BATH-00455.
Acknowledgments
The authors acknowledge and are grateful for the support of the BRE Centre for Innovative Construction Materials (BRE CICM) (www.bath.ac.uk/bre), the University of Bath, the Engineering and Physical Sciences Research Council (EPSRC) (Grant No. EP/M01696X/1), and the China Scholarship Council, who collectively fund the Ph.D. position that resulted in this work.
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Published In
Journal of Composites for Construction
Volume 22 • Issue 6 • December 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Dec 7, 2017
Accepted: Jun 15, 2018
Published online: Sep 28, 2018
Published in print: Dec 1, 2018
Discussion open until: Feb 28, 2019
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