Resilience and sustainability assessment of a prestressed concrete viaduct

The paper explores Greece’s Polyfytos viaduct, the nation’s second-longest bridge spanning 1,372 meters, renowned also for providing access to key power plants in South-East Europe. A resilience analysis of different retrofitting scenarios was conducted, including both transitability and structural capacity aspects, employing visual inspections, digital data collection, and advanced modeling techniques. The viaduct, conceptualized by Prof Riccardo Morandi and built in 1972-1975, displays typical degradation seen in prestressed and reinforced concrete bridges. Unlike previous research focused solely on retrofitting with LCA and LCC assessments, this study integrates resilience assessment, marking a pioneering holistic approach to viaducts refurbishment.