FRP Slab Capacity Using Yield Line Theory
Publication: Journal of Composites for Construction
Volume 18, Issue 6
Abstract
Fiber reinforced polymer (FRP) bars have been increasingly used in bridge deck slabs over the last decades to overcome corrosion issues. However, there is still a critical need for a rational method to analyze the load capacity of such bridge deck slabs. Because FRP bars possess a linear stress-strain relationship, the moment-curvature response of FRP concrete section, either reinforced or prestressed, does not exhibit a distinct yield-plateau, thus it is unclear if conventional yield line theory is applicable. Therefore, the concept of an equivalent plastic moment capacity for FRP concrete sections is introduced and applied in yield line theory for bridge deck slabs. A full-scale bridge deck slab with precast panels reinforced and prestressed with aramid fiber reinforced polymer (AFRP) bars is experimentally tested under different wheel and axle load configurations on either interior spans or overhangs. The results confirm the high accuracy of the failure analysis using the yield line theory, where the load capacity predictions are within 3% accuracy of the experimentally observed results.
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Acknowledgments
This research was supported by a grant from the National Science Foundation (NSF 0927333). The authors would like to express appreciation for the generous support from NSF to conduct this research. The findings and opinions presented in this paper are those of the authors and are not necessarily those of the sponsoring agency.
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Information & Authors
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Published In
Journal of Composites for Construction
Volume 18 • Issue 6 • December 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Sep 26, 2013
Accepted: Jan 31, 2014
Published online: Mar 17, 2014
Discussion open until: Aug 17, 2014
Published in print: Dec 1, 2014
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