Early-age cracking of steel and GFRP-reinforced concrete bridge barriers

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Conference2011 CSCE Annual Conference: 14 June 2011, Ottawa, Canada
Pages110; # of pages: 10
AbstractThis paper presents the preliminary results of an experimental study to investigate the shrinkage and cracking behaviour of GFRP- and steel-reinforced concrete barriers subjected to real environmental and load conditions. This study was conducted through a collaboration project between the University of Sherbrooke and Ministry of Transportation of Quebec (MTQ). The main objective of this investigation was to evaluate the restrained shrinkage cracking behaviour of median barriers (Type MTQ 202ME) reinforced with GFRP and galvanized steel bars and fabricated using high-performance concrete (Type MTQ XIII) with a compressive strength of 50 MPa after 28 days. The barrier under investigation was incorporated in a new Highway 410 Overpass Bridge, located in Sherbrooke, Quebec, which was cast in June 2010. The barrier included one section reinforced with GFRP bars while the second section was reinforced with galvanized steel bars which, in turn, was divided into two sub-sections with different amounts of longitudinal reinforcement (8 bars and 12 bars). The barrier was instrumented with a set of sensors including: fibre optic sensors, vibrating wire strain gauges, electrical resistance strain gauges, and thermometers to capture the strain and temperature evolutions along the barrier length. The behaviour of the barrier for the first few months is presented and discussed in this paper.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number54442
NPARC number20374099
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Record identifier60a02c76-f5d7-4b95-b816-c132e9f261b7
Record created2012-07-23
Record modified2016-05-09
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