Nonlinear structural performance and seismic fragility of corroded reinforced concrete structures: modelling guidelines

The current paper provides modelling guidelines for nonlinear analysis and fragility assessment of corrosion-damaged reinforced concrete (RC) structures. A systematic guideline is proposed to model the adverse impact corrosion on mechanical properties steel materials including negative inelastic buckling low-cycle fatigue (LCF) degradation reinforcing bars. fibre-based technique capable simulating spatial variability localised influence damage states (DS). Corrosion-dependent pushover cyclic analyses, incremental dynamic analyses (IDAs) are carried out three different case studies: (i) a cantilever square RC column, (ii) circular column (iii) frame. results indicate that significantly affects DS, sequence failure mode, flexural capacity energy dissipation Moreover, alongside corrosion, geometry components also their sequence, behaviour capacity. It shown increasing degree penetration in concentration mainly confined concrete.