Corrosion Cracking Process of Reinforced Concrete under the Coupled Effects of Chloride and Fatigue Loading

Study on Cl− Erosion of Concrete under the Combined Effect of Fatigue Load and Wet–Dry Cycles: A Review

“…It has been shown [53] that concrete under fatigue load has the highest reinforcement corrosion rate in the tidal zone, followed by reinforcement located in the submerged and atmospheric zones, and it was further found that reinforcement in concrete in the tidal zone is more sensitive to changes in stress ratios. Shen [84] found that, under the combined effect of fatigue load, wet and dry cycles, and Cl − erosion, the cracking of the concrete's protective layer was a slow process that develops from the inside out, with reinforcement corrosion causing cracks to develop from the inside towards the concrete surface; the fatigue load effect caused the pores to open and periodically, allowing Cl − to be adsorbed into the reinforcement on the side away from the protective layer. Pang [85] found that the residual yield load and ultimate load of beam specimens of RC decreased with increasing the maximum stress level of fatigue load after a cyclic load and 240 wet and dry cycles tests, and they concluded that the maximum stress level had an adverse effect on the yield load and ultimate load capacity, an effect that was greater than the effect of changing the number of cycles.…”