Seismic Resistance of Circular Columns Reinforced with Steel and GFRP
Publication: Journal of Composites for Construction
Volume 21, Issue 4
Abstract
To address the issue of corrosion of steel in concrete structures, glass fiber reinforced polymer (GFRP) reinforcement is slowly gaining acceptability as a replacement of steel. This paper aims to evaluate the feasibility of using GFRP as internal lateral reinforcement in columns and presents the experimental results of seven circular columns that were tested under simulated earthquake forces which included constant axial load and cyclic lateral displacement excursions. In addition to the moment versus curvature response and shear versus deflection behavior, a number of ductility parameters related to curvature and displacement, and work and energy dissipation are used to evaluate the performance of specimens. Due to their linear elastic behavior until rupture at a strain of approximately 0.02, GFRP spirals provided continuous confinement to the columns, which displayed large deformability. The application of GFRP as lateral reinforcement in concrete columns minimizes the corrosion concerns and delivers a strong and ductile column response.
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Acknowledgments
IC-IMPACTS, and Natural Sciences and Engineering Research Council of Canada (NSERC) network of Centres of Excellence, provided the financial support for this work. The first author also acknowledges the NSERC scholarship and Alexander Graham Bell Canada Graduate Scholarship. The experimental program was carried out in the Structures Laboratories at the University of Toronto.
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Information
Published In
Journal of Composites for Construction
Volume 21 • Issue 4 • August 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Mar 13, 2016
Accepted: Sep 15, 2016
Published online: Jan 23, 2017
Discussion open until: Jun 23, 2017
Published in print: Aug 1, 2017
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