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Bending tribo-corrosion-fatigue behaviors between cable wire and saddle material in the suspension bridge

Bo Wang,Dagang Wang,Liang Tang,Hailang Chong,Wei Xu,Xinxin Zhang,Chunlei Zhang,Dianlong Tan,Xia Zhao,Dekun Zhang,Shirong Ge

The coupling effect of dead load, vehicle load, wind load and corrosive environment in the main saddle causes bending tribo-corrosion-fatigue behaviors between the wires and the saddle material in the suspension bridge . A self-made wire test rig was developed for the bending tribo-corrosion-fatigue test between the wire and saddle material in 3.5% NaCl solution and ultrapure water. The tribological properties (friction coefficient, wear mechanism, wear profile, volume loss, etc.), electrochemical corrosion behaviors (Tafel polarization curve , Nyquist diagram) and effect of fatigue load were revealed. The interaction of tribo-corrosion-fatigue was quantitatively analyzed by different types of volume loss, and its mechanism was discussed. The results demonstrated that a synergy of the three becomes more significant with the increasing fatigue load.