Shear strengthening of RC beams with steel reinforced grout (SRG)

Abstract

Steel reinforced grout (SRG) has shown to be an efficient and cost-effective strengthening solution for reinforced concrete (RC) structures. With regard to RC beams, the experimental studies to date have focused mainly on the application of SRG for flexural strengthening of RC beams, however, the study on its application for the strengthening of shear-critical RC beams is scarce. Thus, the present study focuses on the application of SRG for the strengthening of RC beams in shear. Five T-beams were constructed and tested under three-point bending. The effects of steel fabric density and bond schemes on the shear strengthening efficacy of SRG system have been studied. The experimental test results showed that SRG is effective in strengthening of shear-deficient RC beams with the efficacy that varies with the test parameters. The increase in the shear capacity of the strengthened beams varied between 42% to 71%. In addition, the strengthening system has significantly increased the deformational characteristics of the strengthened beams. 2020, University of Cantabria - Building Technology R&D Group. All rights reserved.