Confinement Effectiveness in Rectangular Concrete Columns with Fiber Reinforced Polymer Wraps
Publication: Journal of Composites for Construction
Volume 9, Issue 5
Abstract
An innovative mechanistic based method for passive confinement efficiency estimation is proposed based on the extension to rectangular sections of the pulley model previously proposed by the writers. A refined finite element model was developed using a nonlinear concrete constitutive law in order to analyze stresses in columns passively confined with fiber reinforced polymer wraps. Rectangular and square cross sections of variable corner radii were investigated with reference to a circular cross section. Results showed an increase in corner stresses with sharper corner radii, a localization of failure at the corners, and a decrease in confinement effectiveness with an increase in the rectangularity of the cross section or an increase in corner sharpness. A rigorous numerical method for calculating geometric confinement efficiency factors is proposed and typical factors are calculated and compared with the predictions of the simple pulley model showing good agreement.
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Acknowledgment
The writers wish to acknowledge the financial support of the Lebanese American University Research Council for part of this work.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 9 • Issue 5 • October 2005
Pages: 388 - 396
Copyright
© 2005 ASCE.
History
Received: Sep 13, 2004
Accepted: Mar 14, 2005
Published online: Oct 1, 2005
Published in print: Oct 2005
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