ABSTRACT
The combined effects of repeated load and corrosion can cause fatigue damage to prestressed concrete beams, which would reduce their service life. The fatigue cracks growth size of the strand and cumulative residual strain of concrete were taken as damage parameters in the present study, a fatigue life prediction method of corroded prestressed concrete beams was proposed, and the method comprehensively considered the influence of fatigue crack growth of steel strand, interface corrosion fatigue bond degradation and fatigue damage of concrete. Then the rationality of the fatigue life prediction method was verified by the experimental data. Results show that the experimental values of fatigue life are in good agreement with the predicted values, which proves that the proposed prediction method could effectively predict the fatigue life of corroded prestressed concrete beams.
