Date of Award:
Master of Science (MS)
Civil and Environmental Engineering
Bridge deck corrosion is a major expense in the U.S. every year. The increased use of deicing salts in cold weather climates has led to corrosion of the steel reinforcement in bridge decks, which leads to spalling and delamination of the concrete cover. This results in costly rehabilitations or repairs, and more sustainable bridge deck solutions must be provided to prevent this cycle.
As a part of this research project, a corrosion-resistant, hybrid reinforcement strategy that is shown to be cost neutral with epoxy coated rebar is proposed. The hybrid reinforcement strategy, consisting of discrete Glass Fiber Reinforced Polymer (GFRP) bars along with alkali-resistant fiberglass composite macrofibers, will provide the corrosion-resistance of the GFRP bridge decks along with enhanced ductility.
The research project described consisted of a static testing portion, as well as fatigue testing on full-scale 4’x12’ bridge deck specimens. The three deck types included steel, GFRP-only, and Hybrid GFRP reinforcing in Fiber Reinforced Concrete (FRC). The static decks were loaded until failure, and the fatigue decks experienced 1 or 2 million cycles prior to being tested to failure. The Hybrid Reinforced Concrete (HRC) decks proved to be a viable solution that increases post-peak ductility and passes service and limit state requirements.
McRory, Jared W., "Experimental Static and Cyclic Behavior of Hybrid Non-Metallic Bridge Decks Reinforced with Discrete GFRP Rebar and GFRP Macrofiber" (2020). All Graduate Theses and Dissertations. 7790.
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