Progressive Collapse Resistance Mechanism of RC Frame Structure Considering Reinforcement Corrosion

Corrosion causes reduction in cross-sectional area of reinforcement, deterioration mechanical properties, and degradation bonding properties between reinforced concrete, which are the most important factors leading to structural service performance. In order investigate progressive collapse mechanism a corroded concrete frame structure, failure modes, characteristics vertical displacement, load capacity studied using finite element method. Based on existing experimental research, established model is verified, influence different influencing analyzed. The results show that corrosion reinforcement affects yield load, peak ultimate substructure. As rate increases, tensile arch action shows particularly severe deterioration. variation strength height–span ratio substructure’s load-bearing much more significantly than stirrup spacing.