United States Department of Transportation
i
Design of Anchors for Rapid and Durable Strengthening of Bridges with Externally Bonded Carbon Fiber Reinforced Polymers
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2021-11-23
[PDF-10.05 MB]
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Edition:Final Report 03/01/2019 – 08/31/2021
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Abstract:This study investigates the effectiveness of U-Wraps as a method of flexural anchorage. A total of 12 structural-scale reinforced concrete girders were tested in flexure to examine the effect U-Wraps have on strength gain and ductility. Out of the 12 reinforced concrete girders, 8 girders were strengthened flexurally with carbon fiber reinforced polymer (CFRP) and then anchored with U-Wraps. The remaining 4 girders were used as control specimens. The primary variable that was investigated was the area of U-Wraps compared to the area of longitudinal CFRP installed on a girder. The ratio of the area of the U-Wraps to the area of the longitudinal CFRP was compared to the existing literature data to investigate the effect U-Wraps have on strength gain and ductility. The ultimate goal is to use the findings from the comparison of the experimental data and literature data to influence future design provisions. The future design provisions will account for the increase in load capacity, increase in ductility, and a shift of the failure modes due to the addition of U-Wraps as flexural anchors to flexural CFRP.
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