Full-scale experimental and numerical investigation on the ductility, plastic redistribution, and redundancy of deteriorated concrete bridges

Due to structural degradation, the performance of concrete bridges may degrade with time and result in catastrophic consequences. A novel approach is developed for evaluating time-variant reliability multi-girder considering effects load-carrying mechanism redundancy. By three failure modes at both component system levels, a new indicator proposed quantitatively load elastic distribution plastic redistribution among multiple girders. The adverse material deterioration on capacity, ductility, redundancy, are also investigated incorporated into analytical procedure, which an incremental nonlinear finite element analysis 3D fiber beam used. Furthermore, results associated full-scale destructive tests two situ deteriorated bridges, reinforced (RC) prestressed RC (PRC) T-girder bridge, adopted evaluate accuracy approach. feasibility satisfactory framework evaluated using these real-world bridges. demonstrate that redundancy significantly affect ultimate capacity deteriorating structures.