Bridge Deck and Guardrail Anchorage Detailing for Sustainable Construction
Publication: Journal of Bridge Engineering
Volume 19, Issue 10
Abstract
This paper investigates the use of glass fiber reinforced polymer (GFRP) bar bents as stirrups at the joint between the steel posts of a bridge guardrail system with a deck slab cantilever. In addition, GFRP bars with headed ends are used for better anchorage at the postdeck slab joint. Four full-scale cantilever post specimens were erected and tested to collapse. Two specimens were reinforced with steel bars as control specimens, whereas the other two specimens were reinforced with GFRP straight bars, bent bars, and headed bars at applicable locations. Similar failure modes were observed in all specimens because of curb external side face breakout. Failure occurred in unconfined concrete cover because of significant compressive and frictional shear stresses and also torsional effects, resulting in concrete spalling at the side face of the cantilever at the bottom of the posts. Although it is recommended to consider larger edge distance of the post to prevent premature failure in the unconfined concrete cover, the obtained experimental capacity of the postcurb region was concluded to be sufficient to resist design loads. To calculate the share of the design lateral loads received by each post, a linear finite-element analysis (FEA) and a simplified FEA were used. The analysis showed that the share of each post decreases with decrease in spacing between posts.
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Acknowledgments
The writers of this report thank Schoeck Canada Inc. for supporting this research on the use of GFRP bars in bridge deck slabs. The authors thank Mr. Tony Wing, Transportation Chief Engineer of McCormick Rankin Corporation (MRC), for his valuable comments on GFRP bar arrangement and the experimental test setup. The authors sincerely acknowledge the support provided by Fonds Québécois de la Recherche sur la Nature et les Technologies in the form of a postdoctoral bursary to the first author and Ryerson University Scholarly Research and Creative Activity (SRC) fund.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 19 • Issue 10 • October 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Aug 6, 2013
Accepted: Feb 18, 2014
Published online: Mar 20, 2014
Discussion open until: Aug 20, 2014
Published in print: Oct 1, 2014
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