Damage-Resistant Reinforced Concrete Low-Rise Walls with Hybrid GFRP-Steel Reinforcement and Steel Fibers
Publication: Journal of Composites for Construction
Volume 22, Issue 2
Abstract
Fiber-reinforced polymer (FRP) bars and fiber-reinforced concrete (FRC) are composite materials that have found acceptance in current construction systems due to their high strength-to-weight ratio, durability, and ease of installation. This study presents an experimental and analytical study on the potential of these materials to improve the seismic behavior of low-rise shear walls. Two low-rise concrete shear walls with similar geometry were tested up to failure under pseudostatic lateral cyclic loads. The first wall was a steel-RC low-rise shear wall, compliant with seismic considerations of North American codes for structural reinforced concrete. The second was a steel fiber-reinforced concrete (SFRC) wall reinforced with a hybrid scheme of FRP-steel bars as flexural reinforcement. The FRP bars had the purpose of enhancing the self-centering capacity of the wall, while the SFRC helped to mitigate the damage experienced by the concrete. The goals were achieved reasonably in the testing phase. A finite-element analysis model for low-rise hybrid shear walls was developed and verified with experimental results. The analysis model is able to predict system performance variables with satisfactory accuracy for both walls, such as force-displacement relationship, stiffness, and energy dissipation. The experimental and analytical results show that the hybrid glass fiber-reinforced polymer (GFRP)-steel reinforced walls can achieve similar strength, stiffness, and ductility levels to RC construction while experiencing less residual displacements.
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Acknowledgments
Financial support for this research was provided through a Natural Sciences and Engineering Research Council of Canada (NSERC) Discovery Grant. Technical expertise and material support from BP Automation, Lafarge, Harris Rebar, and Superior Lumber from Edmonton, Canada, are gratefully acknowledged.
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Published In
Journal of Composites for Construction
Volume 22 • Issue 2 • April 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Mar 20, 2017
Accepted: Sep 29, 2017
Published online: Jan 26, 2018
Published in print: Apr 1, 2018
Discussion open until: Jun 26, 2018
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