Abstract
This research focuses on developing and measuring the mechanical behavior of ultrahigh-performance fiber-reinforced concrete (UHPFRC), transverse, field-cast connections between precast bridge deck elements. The connections had a closed shape, exposed aggregates, and lap splice length of 10 bar diameters (db). Three slab designs were considered: high-performance concrete (HPC), high- performance fiber-reinforced concrete (HPFRC), and hybrid HPFRC and UHPFRC. The first set of specimens was subjected to quasi-static loads up to failure, while the second set was subjected to cyclic fatigue loads prior to quasi-static loading to failure. Experimental results showed that all precast bridge decks with UHPFRC connections presented the same stiffness and ultimate strength as equivalent cast-in-place (CIP) slabs. Finite-elements models reproduced experimental results accurately and were used for predicting the mechanical behavior of continuous bridge slabs. Parametric studies demonstrated that, under various loading conditions, transverse UHPFRC field-cast connections do not modify the stiffness, ultimate strength, and failure mode of a slab differently than the equivalent CIP systems.
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Acknowledgments
The authors acknowledge the financial support obtained from NSERC (Canadian Granting agency), FRQNT (Quebec Granting agency through CRIB network), the City of Montreal, Béton Brunet, Jacques-Cartier and the Champlain Bridge Society, and Euclid. The authors also thank the technical team of the Polytechnique Montreal Hydro-Quebec Structures Laboratory.
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Information
Published In
Journal of Bridge Engineering
Volume 22 • Issue 7 • July 2017
Copyright
© 2017 American Society of Civil Engineers.
History
Received: Jul 19, 2016
Accepted: Jan 31, 2017
Published online: Apr 26, 2017
Published in print: Jul 1, 2017
Discussion open until: Sep 26, 2017
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