Rehabilitation of Reinforced Concrete Circular Columns with Sprayed-Glass Fiber–Reinforced Polymer Composites
Publication: Journal of Composites for Construction
Volume 23, Issue 6
Abstract
The seismic behavior of reinforced concrete (RC) circular columns rehabilitated with sprayed-glass fiber–reinforced polymer (GFRP) composites was investigated in this study. Six large-scale RC circular columns were constructed and tested under simultaneous reversed-cyclic lateral loads and a constant axial load. All columns had a diameter of 305 mm with 1,525-mm shear span and were deficient in lap-splice length at the footing-column joint. The six specimens were divided into two identical series. In each series, one specimen was rehabilitated after being fully damaged, one was rehabilitated after being partially damaged (up to 2.5% drift ratio), and one was strengthened without prior loading. The difference between the two series was the thickness of the sprayed-GFRP confinement: 3.0 and 6.0 mm. It was concluded that the 3-mm-thick sprayed GFRP was inadequate for rehabilitation of the fully damaged column; however, it can be used for the rehabilitation of undamaged and partially damaged columns. Sprayed GFRP of 6-mm thickness not only increased the drift capacity of the column but also significantly increased the lateral load capacity of seismically deficient RC circular columns.
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Acknowledgments
The authors wish to express their gratitude and sincere appreciation for the financial support received from the University of Manitoba Graduate Fellowship (UMGF) and the Natural Science and Engineering Research Council of Canada (NSERC). Also, the help received from Dr. A. Parghi, Vector Corrosion Technologies, and the technical staff of McQuade Heavy Structures Laboratory of the University of Manitoba is acknowledged.
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Published In
Journal of Composites for Construction
Volume 23 • Issue 6 • December 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Sep 18, 2018
Accepted: Mar 15, 2019
Published online: Aug 28, 2019
Published in print: Dec 1, 2019
Discussion open until: Jan 28, 2020
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