Analytical Model for FRP-Confined Circular Reinforced Concrete Columns
Publication: Journal of Composites for Construction
Volume 12, Issue 5
Abstract
One disadvantage of most available stress–strain models for concrete confined with fiber-reinforced polymer (FRP) composites is that they do not take into consideration the interaction between the internal lateral steel reinforcement and the external FRP sheets. According to most structural concrete design codes, concrete columns must contain minimum amounts of longitudinal and transverse reinforcement. Therefore, concrete columns that have to be retrofitted (and therefore confined) with FRP sheets usually contain lateral steel. Hence, the retrofitted concrete column is under two actions of confinement: the action due to the FRP and that due to the steel ties. This paper presents a new designed-oriented confinement model for the axial and lateral behavior of circular concrete columns confined with steel ties, FRP composites, and both steel ties and FRP composites. Comparison with experimental results of confined concrete stress–strain curves shows good agreement between the test and predicted results.
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Acknowledgments
This research was supported by the ISIS Canada Network of Centers of Excellence, the Natural Sciences and Engineering Research Council of Canada (NSERC), the Ministry of Transportation of Québec, and the CERIU. The writers wish to thank Professors Jin-Guang Teng, Yan Xiao, and Kenneth W. Neale for kindly providing their complete test data.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 12 • Issue 5 • October 2008
Pages: 541 - 552
Copyright
© 2008 ASCE.
History
Received: Jul 5, 2007
Accepted: Nov 7, 2007
Published online: Oct 1, 2008
Published in print: Oct 2008
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