Behavior of Large-Scale Concrete Columns Wrapped with CFRP and SFRP Sheets
Publication: Journal of Composites for Construction
Volume 16, Issue 4
Abstract
Circumferential wrapping of fiber-reinforced polymer (FRP) sheets is one of the most common applications for repair and rehabilitation of large-scale columns. Common types of fibers used for wrapping are carbon FRP (CFRP), glass FRP (GFRP), and aramid FRP (AFRP). Recently, steel FRP (SFRP) has been introduced as a new class of composites for strengthening applications. Up to now, there has been no experimental data available on the behavior of large-scale columns wrapped with SFRP sheets. Thus, in this paper, the behavior of nonreinforced and reinforced large-scale columns () wrapped with CFRP and SFRP sheets is examined and compared with that of unwrapped columns. The experimental results include stress-strain behavior, ultimate stress, ultimate strain, dilation, and ductility of large-scale columns. This study presents the first ever insight into the strain variation of large-scale circular columns wrapped with CFRP and SFRP sheets using the digital image correlation technique (DICT). This technique is a photogrammetric technique that allows capturing strains from the surface of FRP-confined concrete. Results from DICT were used to analyze the strain efficiency of the SFRP sheets. Results indicate that the overall performance of the SFRP-wrapped concrete columns is superior to that of the CFRP-wrapped concrete columns.
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Acknowledgments
The authors would like to express their gratitude to Sika Canada for providing the epoxy and CFRP sheets and to Hardwire for providing the SFRP sheets. The authors would like to also acknowledge the assistance of Dr. Luke Bisby from University of Edinburgh to implement DICT and Dr. Andy Take from Queen’s University for providing the geoPIV program to perform the analysis of DICT. The authors are also grateful for the financial support towards this research provided by the University of Calgary.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 16 • Issue 4 • August 2012
Pages: 430 - 439
Copyright
© 2012. American Society of Civil Engineers.
History
Received: May 29, 2011
Accepted: Dec 20, 2011
Published online: Dec 23, 2011
Published in print: Aug 1, 2012
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