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The INSPIRE University Transportation Center will present a free webinar with guest speaker Dr. Iris Tien, School of Civil and Environmental Engineering at the Georgia Institute of Technology on Wednesday September 25 from 11:00-12:00 p.m. The topic will be “Data to Risk-Informed Decisions through Bridge Model Updating.” Across the country, bridge structures are aging with use commonly extending beyond their original design lives. Decisions to repair, retrofit, or rehabilitate these structures will support continued reliability and resilience of these structures.
To better understand the states of the bridges at any point in time, there are increasing new technologies to inspect, monitor, and assess the conditions of these bridges. In order to be able to effectively use the results of these inspections and monitoring activities to support repair, retrofit, and rehabilitation decisions, we need an understanding of the relation between varying inspection parameters and the predicted performance of bridge structures.
In this seminar, we will describe methods to use inspection data to update our assessment of bridge performance, focusing on corrosion inspection data. Through bridge model updating, we account for the effects of corrosion, including reduction of longitudinal and transverse reinforcement and bond deterioration between the steel and concrete through corrosion-induced cracking in reinforced concrete bridges. Corrosion is measured by percent mass loss. The impact of measured corrosion parameters on performance is assessed with results quantifying the increase in risk or vulnerability of these structures as corrosion levels increase. Comparing results across bridges supports risk-informed decisions in the management of bridges to protect these structures and ensure their reliability and resilience under future loading and hazard scenarios.
Participants may register on the INSPIRE UTC website https://inspire-utc.mst.edu/webinars/.