Structural Retrofitting of Deteriorated Concrete Lighting Poles Using FRP Sheets in Wet Layup—Field Application
Publication: Journal of Composites for Construction
Volume 10, Issue 3
Abstract
This paper investigates the structural retrofit of deteriorated reinforced concrete lighting poles using wet layup of fiber reinforced polymer (FRP) sheets. The study comprised of four full-scale Class B damaged poles and one full-scale Class C undamaged pole. Each pole was 14,000 mm long with a base diameter of 350 mm linearly tapered to a tip diameter of 165 mm. The damaged poles were reinforced with nine No. 10 steel bars each, whereas the undamaged pole had four prestressed steel strands of 3/8 in. (9.5 mm) diameter. Four different in situ applicable repair schemes, one for each damaged pole, involving the application of E-glass or carbon FRP lateral confining wraps only (unidirectional) or coupled with additional longitudinal flexure sheets (bidirectional) were investigated. The adequacy of the retrofit works was checked through full-scale bending test of the poles in accordance with specification of the Canadian Standard Association. All four repaired poles exceeded the CSA design transverse loading requirement for Class B poles. In addition, the bidirectional E-glass and carbon FRP repaired poles exceeded the benchmark performance of the undamaged Class C pole as a percentage of the required design load with the E-glass pole exhibiting the best performance.
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Acknowledgments
The research was conducted on behalf of the municipality of the City of Toronto who provided the deteriorated concrete lighting poles to laboratory of the University of Waterloo. Repair and retrofitting works were carried out at the laboratory by undergraduate students Edward McGriskin, Elena L’Pris, Russ Parnell, and Mark Spence. The FRP repair materials were graciously donated by Sika Canada and the technical support of their supervisor Richard Sherping is greatly acknowledged. Thanks are extended to Skycast Inc. and their Engineering and Quality Control Manager Ulrich Kuebler who supervised testing of the poles at their manufacturing facility in Guelph, Ontario. The help of Richard Morrison from the University of Waterloo is also appreciated.
References
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 10 • Issue 3 • June 2006
Pages: 234 - 243
Copyright
© 2006 ASCE.
History
Received: Jan 11, 2005
Accepted: Sep 14, 2005
Published online: Jun 1, 2006
Published in print: Jun 2006
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