Seismic Resilience Assessment of Cable‐Stayed Bridges Based on Composite Copula Models

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 seismic resilience assessment method for cable‐stayed bridge systems with the consideration of multi‐component based on Pair Copula and Vine Copula models. In this approach, the seismic vulnerability of the multi‐component cable‐stayed bridge system is calculated by iteratively applying Pair‐Copula and Vine‐Copula models, and the resilience of the bridge is assessed based on these results. A real cable‐stayed bridge is used as an example, where the resilience assessment results obtained through this method are compared with those derived from the first‐order bound method, allowing the effectiveness of this approach to be verified and its applicability demonstrated. It is indicated that this method is highly suitable for capturing the vulnerability of cable‐stayed bridge systems, enabling a more practical resilience assessment to be provided. A theoretical reference for future seismic resilience assessments of cable‐stayed bridges is thus offered by this method.