Long-term resilience assessment of bridge networks using data-driven seismic analysis method for deteriorating bridges

Understanding the long-term seismic resilience of bridge networks is essential to disaster management of transportation infrastructures. For that purpose, a long-term seismic resilience assessment methodology for bridge networks is proposed. It encompasses seismic hazards, structural vulnerabilities, post-earthquake functionality losses, etc., as well as their inherent uncertainties. During that process, two major challenges warrant attention, (1) rapidly capture the time-variant performance of regional bridges under both sudden earthquakes and continuous deterioration effects, and (2) comprehensively evaluate the post-disaster functionality and resilience of bridge networks. To address them, a data-driven method is developed for rapid seismic analysis of regional highway bridges, based on which the residual bridge-, edge-, path-, and network-functionalities can be simulated. Further, this study delves into the functionalities of bridge networks, pioneering a novel set of multi-dimensional seismic resilience metrics. Finally, the long-term seismic resilience of a bridge network in China is investigated as a case study. The results indicate the effects of damage accumulation of the bridge network can result in about 35% resilience decrease, highlighting the necessity of considering deterioration effects in resilience assessment.