Seismic resilience assessment for reinforced concrete frame structural systems based on complex network considering repair paths

This study provides a new resilience-based assessment framework for ductile reinforced concrete (RC) frame structural systems. Using the theory of complex networks, a resilience curve of the structural network system is constructed. The repair sequence of seismic-damaged components is considered through the updatable technology of complex networks. By prioritizing the repair of components that quickly restore network performance, a repair strategy with a convex-shaped resilience curve is proposed. This repair strategy accelerates post-earthquake performance recovery and enhances the resilience of the structural network. The effectiveness of the proposed resilience-based repair strategy is validated by comparing it with multiple sets of randomly generated repair sequences. The results show that the proposed repair strategy exhibits the highest seismic resilience. The effect of resilience enhancement becomes more significant as structural performance loss grows. When structural damage surpasses a slight loss, optimizing repair strategies is recommended, as this can enhance resilience by more than 5 %. A post-earthquake repair strategy that prioritizes key components before non-key components is recommended. To ensure structural redundancy in resilience-based design, controlling damage to non-key components while minimizing damage to key components is advised.