Keynote Lectures

www.7icege.com VII International Conference on Earthquake Geotechnical Engineering KEYNOTE Roma (Italy), 17-20 June 2019 LECTURERS AGI Associazione Geotecnica Italiana Viale dell’Università 11 - 00185 - Roma Tel: +39.06.4465.569 - Fax: +39.06.4436.1035 www.7icege.com - [email protected] DOMNIKI ASIMAKI California Institute of Technology Title of the Keynote Lecture Next generation soil-structure interaction reduced order models Abstract A number of published solutions have been dedicated to problems of dynamic soil-structure interaction (SSI) for geotechnical infrastructure over the past 50 years. Some have been formulated using idealized models with a number of severe assumptions based on physical intuition. Others have been developed by fitting large-scale experimental results or backcalculated from field measurements. Their simplified formulation and wide use notwithstanding, reliable predictions of such models are guaranteed so long as the geometry, material properties and loading conditions of the problems at hand match the reference configurations. Over the past decade, we have worked on developing SSI models based on rigorous mechanics, intended to expand the range of their applicability to conditions outside the range of numerical and physical experiments used to formulate them. In this paper, we present three examples: a framework based on small parameters, energy and momentum balance to resolve soil-structure on rigid retaining walls; a two-dimensional nonlinear SSI model for the transient analysis of pipeline systems subjected to transient ground deformation; and a series of dimensionless expressions estimated using Kalman filtering, which minimize discrepancies between direct and substructure predictions of SSI for buildings on mat foundations. We will specifically highlight the physics of each problem as revealed by formalized mechanics solutions and high-fidelity simulations; present reduced order models that capture salient aspects of the physics; and show comparisons of our model predictions to state-of-the art methodologies. Bio Domniki Asimaki is a Professor of Mechanical and Civil Engineering at Caltech. She has a bachelor’s diploma from the National Technical University of Athens, Greece (1998), and an MS (2000) and PhD (2004) from the Department of Civil and Environmental Engineering at MIT. Her research lies at the interface of geotechnical engineering and earth sciences. She has 15 years experience in the simulation of three-dimensional site eﬀects and their impact on the performance of geotechnical systems; in the modeling of deformation and failure of geomaterials; and in problems of dynamic soil-structure interaction. Domniki is currently an associate editor for the ASCE Journal of Geotechnical and Geoenvironmental Engineering, for Earthquake Spectra, and for Soil Dynamics and Earthquake Engineering. She also serves on the G-I's Soil Dynamics and Earthquake Engineering Technical Committee; and she was recently elected to serve on the G-I’s Board of Governors. She also leads the Ground Motion Interdisciplinary Focus Group of the Planning Committee at the Southern Califor- nia Earthquake Center. She is the recipient of the 2009 Arthur Casagrande Award from the ASCE Geo-Institute, the 2012 Shamsher Prakash Research Award in Geotechnical Earthquake Engineering, the 2015 Young Investigator Award in Geotechnical Earthquake Engineering from the International Society of Soil Mechanics and Geotechnical Engineering (ISSMGE), and the 2017 Bodossaki Award in Engineering and Applied Science. 7 ICEGE.

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