Abstract
The seismic vulnerability of cable-stayed bridges, as crucial transportation nodes with numerous components, has always been a focal point of concern. The paper introduces a vulnerability assessment method for cable-stayed bridge system with the consideration of multi-component based on Pair Copula and Vine Copula models. The seismic resilience of cable-stayed bridges is evaluated by considering the degradation of bridge performance. In this approach, Pair Copula and Vine Copula models are iteratively applied to assess the vulnerability of each component of the cable-stayed bridge, resulting in an overall system vulnerability assessment. Additionally, performance degradation curves for the cable-stayed bridge during a downtime period are defined, and seismic resilience is assessed to simulate the impact of secondary disasters and other post-earthquake damages, leading to a reduction in bridge performance and affecting seismic resilience. The effectiveness of the proposed method is demonstrated using an actual cable-stayed bridge, illustrating its applicability. The study investigates the adverse effects of the degradation process on the seismic resilience of cable-stayed bridges. The results indicate that the method is highly applicable for obtaining the system vulnerability of cable-stayed bridges, providing a more practical assessment of their seismic resilience. This approach serves as a theoretical reference for future assessments of the seismic resilience of cable-stayed bridges.