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May Dinner Meeting – Seismic Stability of Slopes: New Developments and Incorporation of Uncertainty – Ellen Rathje
May 26, 2016 @ 5:30 pm - 8:30 pm
Prof. Ellen M. Rathje, Ph.D., P.E.
University of Texas at Austin
Permanent sliding displacement represents a common damage parameter for evaluating the seismic stability and performance of slopes. Recently developed empirical models for the sliding displacement of shallow (rigid) sliding masses have demonstrated that including multiple ground motion parameters in the predictive model (e.g., peak ground acceleration and peak ground velocity) improves the displacement prediction and reduces its uncertainty. A unified framework is developed that extends these empirical displacement models for application to flexible sliding masses, where the dynamic response of the sliding mass is important. Additionally, a probabilistic assessment of sliding displacement is introduced, which allows the influence of uncertainty to be incorporated. This approach incorporates both the aleatory variability associated with the displacement prediction, as well as the epistemic uncertainty in the input parameters. The framework is demonstrated through application to a site in California.
Bio: Dr. Ellen M. Rathje is the Warren S. Bellows Centennial Professor in the Department of Civil, Architectural, and Environmental Engineering at the University of Texas at Austin, USA. She has expertise in the areas of seismic site response analysis, seismic slope stability, field reconnaissance after earthquakes, and remote sensing of geotechnical phenomena. Dr. Rathje is the Principal Investigator for the development of the DesignSafe-ci.org cyberinfrastructure for the NSF-funded Natural Hazards Engineering Research Infrastructure (NHERI). She is also a founding member and current Co-Chair of the Geotechnical Extreme Events Reconnaissance (GEER) Association, the pre-eminent organization in the world coordinating geotechnical investigations after extreme events, such as earthquakes and floods, and she was a member of the Board of Directors of the Earthquake Engineering Research Institute (EERI) from 2010-2013. She has been honored with various research awards, including the Huber Research Prize from the American Society of Civil Engineers (ASCE) in 2010, the Hogentogler Award for outstanding paper from ASTM Committee D18 in 2010, the Shamsher Prakash Research Award in 2007, and the Shah Innovation Prize from EERI in 2006.
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