Analytical Model for Circular Normal- and High-Strength Concrete Columns Confined with FRP
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Volume 14, Issue 5
Abstract
This paper presents a new incremental stress-strain model for fiber-reinforced polymer (FRP)-confined concrete. The model, able to accommodate concrete with a wide range of strength (25–110 MPa), is based on material properties, force equilibrium, and strain compatibility, and uses newly developed models for constantly confined concrete. An expression is proposed to calculate a FRP jacket rupture strain in columns. Beyond the initiation of rupture, gradual failure of a FRP jacket is modeled to account for the size effect on the FRP-confined concrete columns. This proposed constitutive model is unique in that it accommodates a wide range of concrete strength and uses an analytical rupture strain of a FRP jacket to predict the complete stress-strain curve. Small and large specimens tested by the authors and other researchers are used to validate the proposed model. Very good to excellent agreements have been achieved between the analytical and experimental responses.
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Acknowledgments
The writers would like to express their gratitude to the Natural Sciences and Engineering Research Council of Canada (NSERC) and the Network of Centers of Excellence on Intelligent Sensing for Innovative Structures (ISIS) Canada for financing this research.NSERC
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Information
Published In
Journal of Composites for Construction
Volume 14 • Issue 5 • October 2010
Pages: 562 - 572
Copyright
© 2010 ASCE.
History
Received: Jun 29, 2009
Accepted: Feb 4, 2010
Published online: Feb 22, 2010
Published in print: Oct 2010
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