Review of advances in life-cycle seismic risk and resilience of bridges and bridge networks

Risk assessment and mitigation programs have been carried out over the last decades in the attempt to reduce transportation infrastructure downtime and post-disaster recovery costs after seismic events. Mathematical frameworks have also been proposed to provide a basis for development of predictive models for functionality and resilience of structures and infrastructure networks, particularly regarding bridges and transportation systems. In risk and resilience frameworks, the effects of aging and environmental aggressiveness should be explicitly considered, affecting the structural performance and functionality of civil infrastructure systems. This review paper discusses principles, methodologies, open issues, and current developments in the field of life-cycle seismic risk and resilience of aging bridges and bridge networks.