Seismic Performance of GFRP-Reinforced Concrete Rectangular Columns
Publication: Journal of Composites for Construction
Volume 20, Issue 3
Abstract
This paper presents an assessment of the seismic performance of concrete columns internally reinforced with glass-fiber-reinforced polymers (GFRP) bars. Eight full-scale column prototypes with 1,650-mm shear span and 350-mm square cross-section were constructed and tested under combined lateral cyclic quasi-static and constant axial loading. The test specimens represent the lower portion of first-story columns between the footing and the contra-flexure point. The test parameters included longitudinal reinforcement type and ratio, level of axial load, and stirrup spacing. Test results showed that the drift capacity of GFRP-reinforced concrete (RC) rectangular columns at failure ranged between 8.5 and 12.5%, which exceeds the limitations of North American building codes. This indicates that the deformability of GFRP-RC column prototypes successfully replaced the ductility in steel–RC columns in dissipating the seismic energy in the presence of constant axial load. Furthermore, there was insignificant strength degradation before failure due to the well-confined concrete core.
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Acknowledgments
The authors wish to express their gratitude and sincere appreciation for the financial support received from the Natural Science and Engineering Research Council of Canada, through Canada Research Chairs program and the Network of Centers of Excellence on Intelligent Sensing for Innovative Structures (ISIS Canada). The help received from the technical staff of the McQuade Heavy Structural Laboratory at the University of Manitoba is also acknowledged.
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Published In
Journal of Composites for Construction
Volume 20 • Issue 3 • June 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: May 26, 2015
Accepted: Aug 31, 2015
Published online: Oct 30, 2015
Discussion open until: Mar 30, 2016
Published in print: Jun 1, 2016
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