Analytical Models and Guidelines for the Ductility Enhancement of Circular Reinforced Concrete Single-Column Bents Using Fiber-Reinforced Polymers
Publication: Journal of Bridge Engineering
Volume 16, Issue 1
Abstract
The target displacement ductility requirements for circular RC single-column bridge bents are considered using a proposed multifailure mode algorithm to determine the required thickness of fiber-reinforced polymer wraps (FRPs). The procedure is developed using two in-house computer algorithms, PACCC (plastic analysis of circular concrete columns) and PACCC-FRP, to generate a moment-curvature analysis using circular segment slices and subsequent failure mode predictions in single-column bents for both FRP-wrapped and unwrapped circular RC sections. The results of the study showed good comparison to published experimental tests at the ultimate force-deflection states of RC sections and against three commercial “software test beds.” The study uses PACCC-FRP to show that single columns experiencing a brittle failure may be retrofitted with FRP wraps in order to increase the displacement ductility and satisfy target ductility values within the ductility wrap envelope, or wrap-saturation level, as established herein.
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Acknowledgments
The writers wish to thank the California Department of Transportation and BASF, The Chemical Company (and in particular Mr. Jeff Mosley) for their financial support of this project, including the experimental testing program.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 16 • Issue 1 • January 2011
Pages: 171 - 176
Copyright
© 2011 ASCE.
History
Received: Jan 30, 2009
Accepted: Apr 11, 2010
Published online: May 27, 2010
Published in print: Jan 2011
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