Health monitoring of precast bridge deck panels reinforced with glass fiber reinforced polymer bars

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Publication Type thesis
School or College College of Engineering
Department Civil & Environmental Engineering
Author Ries, James McDaniel
Title Health monitoring of precast bridge deck panels reinforced with glass fiber reinforced polymer bars
Date 2011-05
Description The Beaver Creek Bridge on US highway 6 is the pilot project for Glass Fiber Reinforced Polymer (GFRP) bridge decks and posttensioned bridge decks in the state of Utah. The bridge was built in 2009, using accelerated bridge construction practices, including the use of precast prestressed girders, as well as precast decking. The westbound bridge decking was composed of 12 precast panels each measuring 41'-5" long, 6'-10" wide, and 9¼" thick, and weighing approximately 33 kips. At the time, these panels were the longest GFRP panels in the United States. The Utah Department of Transportation has decided to evaluate GFRP reinforcing bars as an alternative to steel rebar in this bridge deck. The hope is to increase the lifespan of bridge decks to match the service life of the entire bridge. Due to the nature of the GFRP bars, the panels were lifted at four points using straps instead of imbedded anchors. During the four-point lifting, the panels exhibited small deflections and strains; furthermore, no cracks larger than hairline cracks were found in the panels after lifting. The Beaver Creek Bridge deck is the first precast deck in the state of Utah to be posttensioned in the direction of traffic. Posttensioning bridge decks is expected to become the norm in the state of Utah. The posttensioning resulted in increased continuity between panels. In order to quantify the expected performance of the bridge during its service life, a truck load test was performed. The truck load test was comprised of a static and dynamic test. During the truck load test, the bridge experienced deflections in the panels which were 93% below design values. Girder deflections were also small. The use of GFRP bars has the potential to extend the life of bridge decks exposed to deicing salts from 45 years to 100 years, while only requiring an increased capital cost in the bridge of 8%. Furthermore, the use of GFRP bars in conjunction with accelerated building practices has the potential to reduce long-term user delays resulting from maintenance. The difference in capital cost could decrease as designers become more comfortable with the material and gain experience with the system.
Type Text
Publisher University of Utah
Subject Bridge deck; GFRP; Glass fiber reinforced polymer; Post tensioning; Remote data transfer; Truck load test
Dissertation Institution University of Utah
Dissertation Name Master of Science
Language eng
Rights Management Copyright © James McDaniel Ries 2011
Format Medium application/pdf
Format Extent 7,086,976 bytes
Identifier us-etd3,32178
Source Original housed in Marriott Library Special Collections, TG7.5 2011 .R54
ARK ark:/87278/s64b3g21
Setname ir_etd
Date Created 2012-04-24
Date Modified 2018-01-22
ID 194507
Reference URL https://collections.lib.utah.edu/ark:/87278/s64b3g21