Fire Resistance of Fire-Protected Reinforced Concrete Beams Strengthened with Externally Bonded Reinforcement Carbon Fibre-Reinforced Polymers at the Full Utilisation Degree

The fire resistance of reinforced concrete (RC) beams strengthened with externally bonded reinforcement carbon fibre-reinforced polymers (EBR CFRP) depends on the load level and degree strengthening. Design guides for this type structure recommend strengthening limits to prevent collapse due vandalism, damage or fire. In practice, however, it is not uncommon exceed proposed limits. This necessitates protection CFRP adhesive against high temperatures, namely glass transition temperature levels. paper presents results 10 full-scale experimental tests EBR strengthening, without under various levels including full utilisation. It was demonstrated that in cases where needed carry an accidental scenario, test specimens achieved same resistance. also proven failure influenced entire beam, crucial maintaining beam’s load-bearing capacity its thickness had be substantial. A rating over 4 h achieved, nevertheless.