Life Prediction of Reinforced Concrete of Wind Power Foundation in Inner Mongolia Chloride Environment

According to the chloride environment in Tongliao, Inner Mongolia, based on the modified Fick's second rules and electrochemical corrosion rules, the simulation of chloride transport and steel corrosion in concrete was carried out. The multi-physics coupling software Comsol Muhiphysic was used to establish the corrosion and cracking model of the wind turbine foundation steel bar, and to predict the structural life of reinforced concrete of wind turbine in this area. The results showed that when the chloride concentration on the concrete surface decreased from 1.8% to 1.2%, and the cracking time of protective layer was delayed from 27 years to 31 years. The thickness of protective layer on surface of wind turbine foundation in Tongliao area was 42 mm, and it took 27 years for the crack width to reach the allowable maximum value. Taking into account the climate in the four seasons,it took 34 years. For every 3 mm increased in the thickness of protective layer, the cracking time was delayed by about 1.2 years.