EFFECT OF INTERACTION BETWEEN LOADING AND ENVIRONMENT ON CORROSION FATIGUE OF REINFORCED CONCRETE BEAM

The effect of interaction between cycle loading and aggressive environment on corrosion fatigue of reinforced concrete beams was studied. The strain increase of the reinforcing bars was accelerated under simultaneous corrosion and fatigue loading from the experimental results. The effect of coupling action of corrosion fatigue was more serious than that of fatigue or corrosion and fatigue after corrosion on the deterioration of RC members. The coupling action was continuous with the strain increase until the RC members were destructed. The investigation shows that the corrosion fatigue is the main cause for the reinforced concrete beams to lose the durability. The experimental results may provide the reference for the durability design of reinforced concrete members and the protection measures of RC members in service.