Behavior of Large-Scale Rectangular Columns Confined with FRP Composites
Publication: Journal of Composites for Construction
Volume 14, Issue 1
Abstract
This paper focuses on axially loaded, large-scale rectangular RC columns confined with fiber-reinforced polymer (FRP) wrapping. Experimental tests are conducted to obtain the stress-strain response and ultimate load for three field-size columns having different aspect ratios and/or corner radii. Effective transverse FRP failure strain and the effect of increasing confining action on the stress-strain behavior are examined. Existing strength models, the majority of which were developed for small-scale specimens, are applied to predict the structural response. Since some of them fail to adequately characterize the test data and others are complex and require significant calculation, a simple design-oriented model is developed. The new model is based on the confinement effectiveness coefficient, an aspect ratio coefficient, and a corner radius coefficient. It accurately predicts the axial ultimate strength of the large-scale columns at hand and, when applied to the small-scale columns studied by other investigators, produces reasonable results.
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Information
Published In
Journal of Composites for Construction
Volume 14 • Issue 1 • February 2010
Pages: 62 - 71
Copyright
© 2010 ASCE.
History
Received: Jun 10, 2008
Accepted: Jun 11, 2009
Published online: Jun 22, 2009
Published in print: Feb 2010
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