Abstract
This paper studies the deflection under fatigue load failure and the corrosion fatigue life of partially prestressed concrete beams through the static test and fatigue test of 6 different corrosion rates of partially prestressed concrete beams. The experimental results show that: 1) The corrosion inserts a great influence on the fatigue failure of concrete beams; the fatigue failure of reinforced concrete beams at a low corrosion rate is mainly caused by fatigue fracture of tensile rebars; and when the corrosion rate is high, the failure mode of concrete beams evolves into the cracking and final crushing of reinforced concrete in compressive zone. 2) As the corrosion rate increases, the fatigue life of concrete beams decreases significantly, which affects the fatigue performance of concrete beams. (3) With the increase of fatigue load, the development of mid-span deflection of the test beams shows an obvious rule of three stages: the deflection grows faster at the initial stage, and slower at the medium stage.
