Fatigue behaviour of CFRP L-shaped plates for shear strengthening of RC T-beams

摘要

Prefabricated carbon fibre reinforced plastic (CFRP) L-shaped plates can be used to shear strengthen reinforced concrete (RC) T-beams. Previous investigations by EMPA have shown the suitability of the CFRP L-shaped plates for static shear strengthening. In this paper, a large-scale fatigue test is presented which demonstrated the suitability of the CFRP L-shaped plates lor shear strengthening of RC T-beams for fatigue reasons. The test beam was subjected to 5 million load cycles at a high load level and a subsequent failure test. Its behaviour is compared with that of a similar, statically tested beam. A fatigue design proposal is presented for users of the CFRP L-shaped plates.