Critical Evaluation of Strain Measurements in Glass Fiber-Reinforced Polymer Bridge Decks
Publication: Journal of Bridge Engineering
Volume 10, Issue 6
Abstract
An experimental study of principal strains and deflections of glass fiber-reinforced polymer (GFRP) composite bridge deck systems is presented. The experimental results are shown to correlate well with those of an analytical model. While transverse strains and vertical deflections are observed to be consistent, repeatable, and predictable, longitudinal strains exhibit exceptional sensitivity to both strain sensor and applied load location. Large, reversing strain gradients are observed in the longitudinal direction of the bridge deck. GFRP deck system geometry, connectivity, material properties, and manufacturing imperfections coupled with the observed strains suggest that the performance of these structures should be assessed under fatigue loading conditions. Recommendations for accurately assessing longitudinal strain in GFRP bridge decks are made, and a review of existing data is suggested.
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Acknowledgments
This research was funded by the South Carolina Department of Transportation and the Federal Highway Administration. The writers would like to thank Mr. Greg Solomon of Martin Marietta Composites and acknowledge Preston Felkel for his assistance in instrumenting the test specimens. The opinions, findings, and conclusions expressed in this paper are those of the writers and not necessarily those of the sponsors or participants.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 10 • Issue 6 • November 2005
Pages: 704 - 712
Copyright
© 2005 ASCE.
History
Received: Feb 20, 2004
Accepted: Dec 9, 2004
Published online: Nov 1, 2005
Published in print: Nov 2005
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