ABSTRACT
Engineering structures and infrastructures are exposed to various hazards throughout their service life. When subjected to natural disasters, such as earthquake sequences and riverine floods, bridges emerge as highly vulnerable elements within transportation networks, which are important infrastructure facilities. The ongoing rise in greenhouse gas emissions, particularly carbon dioxide (CO2), is widely regarded as the underlying cause of global warming and climate change that are posing a significant threat to various types of structures, including bridges. Studies have provided evidence that climate change is responsible for a rise in the frequency and magnitude of hydrological extremes. Intensified future design floods have been observed to lead to higher likelihood of increased scouring around river crossing bridge piers. Also, global warming and climate change accelerate aging and deterioration processes of materials and structural components. This paper presents a probabilistic resilience-based prioritization framework for aging bridges and bridge networks under multiple hazards, including seismic sequences, floods, and corrosion processes, in a changing climate. The proposed approach exploits multi-objective optimization to identify optimal solutions, determining the best retrofit methods, and prioritizing repair activities. The results of the application to a six-bridge transportation network address cost-effective enhancement of resilience by strategically managing rehabilitation activities.
