STUDY OF STRENGTHENING GFRP SHEETS ON REINFORCED CONCRETE BEAMS DUE TO FLEXIBLE LOADS

Abstract

One method of strengthening structural elements such as beams that experience strength degradation due to fire or corrosive reinforcement is by using fiber reinforced concrete (FRP), in this case the glass fiber reinforced concrete (GFRP) type is used. This research will compare previous research where reinforced concrete beams with dimensions of 150 mm x 200 mm x 3300 mm using 3D13 mm tensile reinforcement and P8-80/200 mm (BE) shear reinforcement are compared with reinforced concrete beams using 3D10 mm tensile reinforcement and reinforcement. shear P8-100/175 mm (BK) and reinforced concrete beams with additional GFRP reinforcement (BNS). The quality of concrete used from the compressive strength test results for the existing BE beam is 21.82 MPa, while the BK and BNS control beams use a concrete quality of 23.48 MPa, which means the quality of the three beam variations is almost the same or close. The bending test results show that the BK beam has a lower ultimate capacity than the BE beam by 19.12%, while the BNS beam has a greater ultimate strength than the BE beam by 17.28%. This phenomenon shows that strengthening with GFRP is able to restore lost concrete capacity and is better than before.