FLEXURAL AND SHEAR STRENGTHENING OF REINFORCED CONCRETE STRUCTURES WITH NEAR SURFACE MOUNTED FRP RODS

摘要

The use of Near Surface Mounted (NSM) Fiber Reinforced Polymer (FRP) rods is a promising technology for increasing flexural and shear strength of reinforced concrete (RC) members. This study investigated the structural performance of full-size simply supported RC beams externally strengthened with NSM FRP rods. Both flexural and shear strengthening were examined. Carbon and Glass FRP rods of different sizes were used for flexural strengthening. Carbon FRP deformed rods were used for shear strengthening. The variables examined in the shear tests were spacing of the rods, strengthening pattern, end anchorage of the rods and presence of internal steel shear reinforcement. Performance of the tested beams and modes of failure are presented and discussed in this paper. The test results confirm that NSM FRP rods can be used to significantly increase the flexural and the shear capacity of RC elements, with efficiency that varies depending on the tested variables.