INSPIRE University Transportation Center Webinar: Accurate and Efficient Updating of Bridge Risk Assessments Based on Inspection Data
June 13 @ 12:00 pm - 1:00 pm| Free
INSPIRE University Transportation Center Presents
ACCURATE AND EFFICIENT UPDATING OF BRIDGE RISK ASSESSMENTS BASED ON INSPECTION DATA
Present: June 13, 2023, 12:00 PM Central Time (US and Canada)
Speaker: Dr. Iris Tien, Georgia Institute of Technology
A FREE WEBINAR
As structural inspection data is increasing, it is important to be able to translate this information into accurate and efficient updating of bridge risk assessments to support risk-based decision-making. Analytical fragility functions provide a way to quantify the risk of a structure. One method to construct seismic fragility curves is to perform a series of nonlinear dynamic analyses of the structure. However, the high computational cost in running and re-running analyses over the full finite-element model can be prohibitive to effectively update bridge risk assessments. This talk will describe new methodologies to efficiently and accurately update analytical fragility curves. The reduction in computational cost from both reducing the number of analyses required and simplifying the structural complexity are investigated. The method is applied to update calculations of seismic bridge fragilities accounting for varying levels of measured corrosion. Results comparing updated fragility curves obtained from using the proposed approach versus using the full set of dynamic analyses show that the proposed method achieves accurate, stable, and more quickly converging fragility calculations. In addition to this work on the impacts of corrosion on bridge risk, further work on integrating scour inspection data into updated assessments of bridge risk will also be discussed.