Fatigue model for the structural integrity evaluation applied to a wind turbine concrete shaft, considering corrosion and freeze and thaw degradation

Abstract

Fatigue is one of the principal damage mechanisms in a slender concrete structure under cyclic loads. And needs to be calculated locally through all the structure, considering the lading conditions and the particularities of concrete. The model presented here is capable to account for the fatigue damage in a probabilistic way, relating the annual loading conditions for each point and the degradation processes with a probability of failure. The methodology is as well capable to model the effect of a repair and control the structural integrity using the monitored data.