On the strengthening of RC beams by epoxy-bonded links of L-shaped CFRP strips against shear failure

摘要

The paper describes a laboratory series of 5 nos. of test beams, which have been strengthened by epbxy-bonded L-shaped CFRP strips (Sika CarboShear L), and loaded until shear failure. The test beams were simply supported, ordinarily reinforced, prismatic beams with rectangular cross-sections. The dimensions of the test beams were a length of 4.5 m, a height of the cross-section of 0.50 m and a width of the cross-section of 0,15 m. The beams were reinforced with enough reinforcement to ensure a shear failure. The beams were loaded to failure by two loads in such a way (i.e. non-symmetrical) that the shear failure would take place at the predetermined beam end, monitoring with strain gauges etc. for documentation of the forces in the CFRP links (stirrups). The tests were carried out at a laboratory temperature of appx. 23 ℃.