Field monitoring of MTQ 202ME concrete bridge barriers reinforced with GFRP and steel bars

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Proceedings titleSHMII-5 2011 Proceedings
Conference5th International Conference on Structural Health Monitoring of Intelligent Infrastructure, SHMII-5 2011, December 11-15, 2011, Cancun, Mexico
SubjectCollaboration projects; Concrete bridge barriers; Crack initiation and propagation; Early age shrinkages; Electrical resistances; Galvanized steels; Steel reinforced concrete; Vibrating wire sensor; Bars (metal); Compressive strength; Cracks; High performance concrete; Structural health monitoring; Temperature measurement; Temperature sensors; Thermometers; Reinforcement
AbstractThrough a collaboration project between the Ministry of Transportation of Quebec (MTQ) and the University of Sherbrooke, the field monitoring of GFRP- and steel-reinforced concrete barriers is being conducted. The barriers are constructed on a 6-lane bridge using high-performance concrete with a compressive strength of 50 MPa after 28 days. The barrier under consideration was median barrier type MTQ 202ME constructed on the 410-overpass bridge on the Highway 410 separating the 6-lane bridge into three lanes in each direction. The field monitoring included two sections of 23 m-long and 24 m-long. The first section (24 m-long) was reinforced with GFRP bars and the second one (23 m-long) was reinforced with galvanized steel bars. The main objective was to monitor the crack initiation and propagation as well as the strain evolution in both GFRP- and steel-reinforced sections. Besides, the effect of early age shrinkage and cracking of the high-performance concrete was captured thought the monitoring reading. The GFRP bars were instrumented with fiber-optic sensors (FOS) at different locations along the barrier length while the steel bars were instrumented with vibrating wire strain gauges (VWSG). Thermometers (TH-T) were also used for temperature measurements. In addition to the FOS and the vibrating wire strain gauges, electrical resistance strain gauges (ESG) were also used for additional measurements. The vibrating wire sensors and thermometers were connected to two multiplexers and a Datalogger type CR10X to capture their readings while the FOS sensors were connected to a 16-channel DMI unit to capture and store their readings. The readings of the ESG, however, were captured using the P-3500 readout unit. The results and the general discussion of the measured readings as well as some concluding remarks are presented.
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AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Research in Construction
Peer reviewedYes
NPARC number21271956
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Record identifierfeed981f-b73a-44ae-83f1-c26cb65c3889
Record created2014-05-13
Record modified2016-05-09
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