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Fibers 2016, 4(2), 13;

Performance of Hybrid Reinforced Concrete Beam Column Joint: A Critical Review

1,†,* , 2,†
School of Engineering, University of British Columbia, Kelowna, BC V1V1V7, Canada
Department of Architectural Engineering, The Pennsylvania State University, University Park, PA 16802, USA
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Academic Editor: Mahmoud Reda Taha
Received: 28 November 2015 / Accepted: 28 March 2016 / Published: 12 April 2016
(This article belongs to the Special Issue Fiber Reinforced Polymers (FRP) for Infrastructure Applications)
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Large residual strain in reinforced concrete structures after a seismic event is a major concern for structural safety and serviceability. Alternative reinforcement materials like fiber-reinforced polymer (FRP) have been widely used to mitigate corrosion problems associated with steel. Low modulus of elasticity and brittle behavior compared to steel has made the use of FRP unsuitable in seismic resistant strictures. A combination of steel-FRP reinforcement configuration can address the problem of corrosion. Therefore, introducing a material that shows strong post elastic behavior without any decay due to corrosion is in demand. Shape memory alloy (SMA), a novel material, is highly corrosion resistive and shows super elastic property. Coupling SMA with FRP or steel in the plastic hinge region allows the structure to undergo large deformations, but regains its original shape upon unloading. In this study, the performance characteristics of four previously tested beam-column joints reinforced with different configurations (steel, SMA/steel, glass fiber reinforced polymer (GFRP) and SMA/FRP) are compared to assess their capacity to endure extreme loading. Experimental results are scrutinized to compare the behavior of these specimens in terms of load-story drift and energy dissipation capacity. SMA/FRP and SMA/Steel couples have been found to be an acceptable approach to reduce residual deformation in beam-column joints with adequate energy dissipation capacity. However, SMA/FRP is superior to SMA/Steel concerning to the corrosion issue in steel. View Full-Text
Keywords: SMA; GFRP; beam-column joint; seismic SMA; GFRP; beam-column joint; seismic

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Kabir, M.R.; Alam, M.S.; Said, A.M.; Ayad, A. Performance of Hybrid Reinforced Concrete Beam Column Joint: A Critical Review. Fibers 2016, 4, 13.

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