Design of FRP Jackets for Plastic Hinge Confinement of RC Columns
Publication: Journal of Composites for Construction
Volume 17, Issue 4
Abstract
A design method is developed for determining the required thickness of fiber-reinforced polymer (FRP) composite jackets in rehabilitating RC columns to achieve a target displacement ductility. The method is applicable to RC columns with a rectangular, square, or circular cross section. The FRP jacket thickness is determined from the target ultimate compressive strain of confined concrete within the plastic hinge region. The design is based on the strain ductility increase provided by the jacket. Relationships are introduced to determine the minimum FRP jacket thickness required to preclude strain-softening compressive behavior of rectangular, square, or circular columns. This minimum jacket stiffness can prevent premature failure of the FRP jacket due to uncontrolled dilation of the confined concrete. The design procedure compares favorably with experimental results from the literature for columns upgraded with FRP jackets, which displayed a substantial displacement ductility increase.
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Acknowledgments
The research was supported by the National Science Foundation under Grant No. CMS 0099792. The opinions expressed in this article are those of the writers, and do not necessarily reflect the opinions of the sponsoring organization.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 17 • Issue 4 • August 2013
Pages: 433 - 442
Copyright
© 2013 American Society of Civil Engineers.
History
Received: May 16, 2012
Accepted: Sep 7, 2012
Published online: Sep 10, 2012
Discussion open until: Feb 10, 2013
Published in print: Aug 1, 2013
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