Life-Cycle Seismic Resilience Assessment of Reinforced Concrete Bridges in Aggressive Environments
Reinforced concrete (RC) bridges in seismic-prone areas may experience multiple earthquakes during their service periods. The exposure of RC bridges in aggressive environments can exacerbate structural deteriorations and reduce their capacity to withstand seismic events. In the meantime, structural damages due to earthquakes may increase the exposure of reinforced steel to aggressive environments and expedite the chloride-induced corrosion processes. Thus, a comprehensive understanding of the interactions of the effects of corrosion and seismic events on structural deterioration is very important to provide a realistic assessment of bridge life-cycle resilience. However, most existing studies have mainly estimated the effect of corrosion-induced deterioration on structural capacity against hazards. While it is really necessary, the impacts of structural damages following earthquakes on the time-dependent corrosion processes have not been investigated in any depth. Moreover, small magnitude earthquakes with high-probability may continuously affect the processes of deterioration for RC bridges, which has been ignored in existing studies. In this context, this project contributes to filling the research gaps by proposing a comprehensive interdisciplinary framework that combines the structural damages due to seismic events and theexposure to non-uniform corrosion for RC bridges. First, the probability seismic hazard analysis (PSHA) is utilized to generate a stochastic set of seismic events with multiple levels of magnitudes and the ground motions at the bridge location of interest. Then, the time-dependent bridge deterioration model is developed by incorporating the interaction of the effects of corrosion and seismic event on structural behaviors, and subsequently used for the assessment of life-cycle resilience. Finally, a RC bridge in Seattle, WA is applied as the case study to illustrate this proposed framework. By doing so, the proposed framework can provide a more realistic resilience assessment for RC bridges under the combined effects of corrosion and seismic event, which can help bridge managers to determine effective resilience-enhancing strategies in long-term development planning.
Language
- English
Project
- Status: Active
- Funding: $90195
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Contract Numbers:
69A3551947137
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Sponsor Organizations:
Transportation Infrastructure Durability & Life Extension
Washington State University
Civil & Environmental Engineering
Pullman, Washington United States 99164Office of the Assistant Secretary for Research and Technology
University Transportation Centers Program
Department of Transportation
Washington, DC United States 20590 -
Managing Organizations:
Transportation Infrastructure Durability & Life Extension
Washington State University
Civil & Environmental Engineering
Pullman, Washington United States 99164 -
Project Managers:
Bruner, Britain
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Performing Organizations:
Washington State University, Pullman
Civil & Environmental Engineering Department
PO Box 642910
Pullman, WA United States 99164-2910 -
Principal Investigators:
Shi, Xianming
Zhao, Jie
- Start Date: 20231001
- Expected Completion Date: 20240930
- Actual Completion Date: 0
- USDOT Program: University Transportation Centers
- Subprogram: Transportation Infrastructure Durability and Life Extension
Subject/Index Terms
- TRT Terms: Corrosion; Deterioration by environmental action; Hazard analysis; Reinforced concrete bridges; Seismicity
- Geographic Terms: Seattle (Washington)
- Subject Areas: Bridges and other structures; Highways; Maintenance and Preservation;
Filing Info
- Accession Number: 01924704
- Record Type: Research project
- Source Agency: National Center for Transportation Infrastructure Durability and Life-Extension
- Contract Numbers: 69A3551947137
- Files: UTC, RIP
- Created Date: Jul 18 2024 3:31PM