Stray current-induced corrosion in the electrified rail transport system

Stray field-induced corrosion can substantially degrade the durability of adjacent reinforced concrete structures (RCS), especially coupled with fatigue load simultaneously. Thus, in this chapter, a numerical algorithm is discussed and established for both DC- and AC-induced corrosion to determine the temporal and spatial distribution of the interfacial corrosion current density and stray electric field in RCS. In addition, to verify the effectiveness of the proposed algorithm, a scale viaduct model was cast and measured. Furthermore, the damage investigation of reinforcing steel subjected to stray electric field-induced corrosion coupled with axial fatigue load was carried out. The proposed numerical algorithm and experiment results provide the key basis for safety assessment, maintenance, and reinforcement, as well as the performance-based design of the RC infrastructure.