Seismic Performance Evaluation of Highway Bridges under Scour and Chloride Ion Corrosion

Cross-river bridges located in seismically active areas are exposed to two major natural hazards, namely earthquakes and flooding. As the scour depth increases, more parts of bridge substructure will inevitably be unfavorable conditions such as chloride ion (Cl−) corrosion. To investigate seismic performance highway under action Cl− corrosion, a spatial finite element dynamic model continuous rigid was established Cl−-accelerated electrochemical corrosion test quasi-static were carried out. The results showed that reasonable combination sub-factors joint probability density can obtained establish combined expression effect. cause reduction displacement ductility, load-bearing, energy dissipation capacity, increase inequivalent viscous damping coefficient columns. Seismic damage columns grows linearly twice ultimate which becomes significant with reinforcement ratio.