Rehabilitation of reinforced concrete haunched beam with carbon fiber reinforced polymer (CFRP) strips

This thesis presents the shear behavior of damaged reinforced concrete haunched beams after repaired by injection epoxy and strengthened with unidirectional carbon fiber reinforced polymer strips (CFRP) at shear zone. The beams were designed without steel stirrups in order to fail in shear manner and after then rehabilitated. The experimental investigation was accomplished on twelve RC haunched beams of three different groups. The first group included two prismatic beams were repaired by epoxy injection and strengthened with vertical CFRP strips that have different width, the second group included eight haunched beams with different angles of inclination (10°and 15°). This group was repaired by epoxy injection and strengthened with CFRP strips by two methods, vertical (90°) and inclined (45°) according to the x-axis of the beam. The third group included two beams with an inclination of 5° which is repaired with epoxy injection.