Model for Analysis of Short Columns of Concrete Confined by Fiber-Reinforced Polymer
Publication: Journal of Composites for Construction
Volume 8, Issue 4
Abstract
This paper presents a numerical model for evaluating the behavior of axially loaded rectangular and cylindrical short columns of concrete confined by fiber-reinforced polymer (FRP) composites. The proposed formulation considers, for unconfined and confined compressed concrete, a uniaxial constitutive relation that utilizes the area strain as a parameter of measure of the material secant axial stiffness. For unconfined concrete, the model adopts an explicit relationship between axial strain and lateral strain, while for confined concrete, an implicit relation is considered. For this last case, the model employs a simple iterative-incremental approach that describes the entire stress-strain response of the columns. The behavior of the FRP is considered linear elastic until the rupture. To validate the model, a number of columns were analyzed and the numerical results were compared with experimental values published by other authors. This comparison between experimental and numerical results indicates that the model provides satisfactory predictions of the stress-strain response of the columns.
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Information
Published In
Journal of Composites for Construction
Volume 8 • Issue 4 • August 2004
Pages: 332 - 340
Copyright
Copyright © 2004 American Society of Civil Engineers.
History
Received: Sep 4, 2002
Accepted: Aug 21, 2003
Published online: Jul 15, 2004
Published in print: Aug 2004
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