Fire Resistance of CFRP-strengthened Reinforced Concrete Beams under Various Load Levels

Abstract The paper presents results of ten fire resistance tests performed on reinforced concrete beams, with and without carbon fibre-reinforced polymers (CFRP) strengthening. Part of the beams have been fire protected with fire protective boards of large thicknesses. The tests were performed under various load levels, ranging from 100% to 163% of their design loadbearing capacity in fire situation prior to strengthening. Test results show that structural fire design of CFRP-strengthened elements leads to three possible calculation models of fire protection thickness needed, depending on the load level reduction.