International Conference on Sustainable Infrastructure 2019
Probabilistic Sustainability Assessment of Bridges Subjected to Multi-Occurrence Hazards
Publication: International Conference on Sustainable Infrastructure 2019: Leading Resilient Communities through the 21st Century
ABSTRACT
Bridges are among critical components of transportation infrastructure systems. These structures can experience multiple low probability-high consequence natural hazards, such as earthquake, during their long lifetime. Vast economic, social, and environmental consequences of seismic-induced damages to bridges demand for comprehensive multi-faceted lifecycle analysis of bridges. Commonly, the primary focus of lifecycle analysis frameworks has been the assessment of economic consequences of infrastructure investments and little attention has been given to the analysis of social and environmental impacts. This study investigates the economic and environmental impacts of various retrofit plans for bridges quantified over the lifetime of the infrastructure in order to determine the most sustainable plan. Since bridges are long-lived systems and may encounter several occurrences of earthquakes during their lifetime, effects of repair actions being incomplete prior to the occurrence of the next hazard can play a significant role in the sustainability assessment. Therefore, in this study, a probabilistic framework is developed to incorporate effects of multiple occurrences of earthquakes and incomplete repair actions for damages induced under stochastically generated future seismic events. Sustainability here is quantified in terms of economic and environmental indicators, which are based on the expected lifecycle cost, expected carbon dioxide emissions, and expected energy waste in the lifetime of the infrastructure. Results of this investigation facilitate analysis of sustainability metrics, allowing for objective consideration of sustainability in determining optimal investment decisions.
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Information & Authors
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Published In
International Conference on Sustainable Infrastructure 2019: Leading Resilient Communities through the 21st Century
Pages: 555 - 565
Editors: Mikhail V. Chester, Ph.D., Arizona State University, and Mark Norton, Santa Ana Watershed Project Authority
ISBN (Online): 978-0-7844-8265-0
Copyright
© 2019 American Society of Civil Engineers.
History
Published online: Nov 4, 2019
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