Shear Strength of Reinforced Concrete Girders with Carbon Fiber-Reinforced Polymer: Experimental Results
2012
Fiber-reinforced polymers (FRPs) are increasingly being used to repair and strengthen conventionally reinforced concrete bridge members. Much of the existing performance data for members repaired with FRP have been developed from tests of reduced-scale specimens. This study reports experimental results for eight very large reinforced concrete deck girders strengthened with surface-bonded carbon FRP (CFRP) for shear. The girders were designed to refect realistic mid-twentieth century vintage proportions, materials, and details. Test results show that the CFRP provided additional shear strength and deformation capacity, even with large debonded regions prior to failure. The materials also increased the member stiffness and failures were controlled by debonding of the U-wrapped CFRP strips along the edges of the deck-stem intersection.
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