Predictions and Evolution Characteristics of Failure Modes of Degenerate RC Piers

During the service process, piers are often in harsh chloride ion erosion environments. The failure mode evolution of reinforced concrete (RC) may occur under action continuous corrosion. Accurately identifying types and characteristics corroded RC bridge is a prerequisite for lifetime seismic performance evaluations bridges. First, based on Fisher’s theory 174 pier columns as analysis samples, two-stage discrimination formula modes was established compared with existing theoretical methods. Then, discriminant grouping, combined Bayes’ theory, method corrosion-damaged that considers probability developed. Finally, taking medium-span an example, different periods were predicted, influences various parameters process studied. results show accuracy proposed model significantly improved those previous studies. development features depends how distinct material qualities degrade influence ions. degradation stirrups accelerates nonductile piers, while longitudinal reinforcements delays it.