2022 Dataset Award Winner – Centrifuge Testing of Liquefaction-Induced Downdrag on Axially Loaded Piles

October 5, 2022 | 1:00pm - 2:00pm CT

About the Webinar

PRJ-2828 in DesignSafe features data from a series of two large centrifuge model tests. Performed at the NHERI Centrifuge Experimental Facility of UC Davis, the tests were designed to capture the time-dependent nature of liquefaction-induced downdrag on axially loaded piles in interbedded soil deposits. A variety of conditions were considered regarding the pile properties, the soil profile, and motions, yielding an unparalleled set of case histories. The dataset includes extensive documentation: data reports together with design schematics and videos which detail the experiments, open-source codes for processing, recorded and processed data, and help documents and metadata on how to navigate the dataset. Details are also provided on the sensing methods developed specifically for these tests: internal pile strain gages to measure axial loads, low-cost transducers for measuring dynamic pore pressures, a contactless method using a line laser with a camera to measure surface settlement, use of high-speed cameras and 3D stereophotogrammetry to measure 3D movements, and use of laser scanner to measure surface settlements. The dataset offers versatility for its users for a broad range of applications: from advanced instrumentation, to site response and reconsolidation analyses, to soil-structure-interaction analyses.

This webinar will discuss the centrifuge model testing design with a focus on the targeted mechanisms, the instrumentation and data acquisition developed for those, as well as data processing, curation, and documentation with the potential users in mind.

Presenters

Sumeet Kumar Sinha is a postdoctoral scholar in the Soga Research Group at the University of California Berkeley and works on developing distributed fiber optic sensing systems and enabling their application to health monitoring of civil infrastructure. He received his undergraduate degree from the Indian Institute of Technology Delhi in India (2014) and his MSc (2017) and Ph.D. (2022) degrees from the University of California, Davis. He also holds a minor degree in computer science and engineering. His research interests lie in pile foundations, earthquake engineering, liquefaction, sensing technologies, and computational geomechanics.

Katerina Ziotopoulou received her five-year Diploma in Civil Engineering from the National Technical University of Athens in Greece (2007), and her M.Sc. (2010) and Ph.D. (2014) degrees from UC Davis. She joined the UC Davis in 2016, where she is currently an Associate Professor. Her research focuses on the numerical and experimental investigation of geosystems subject to liquefaction and cyclic softening, as well as the development of physics-informed data-driven approaches for geotechnical earthquake engineering applications. She is a Licensed Professional Engineer in Greece and in California, and the recipient of the 2021 Arthur Casagrande Professional Development Award of ASCE and the National Science Foundation CAREER Award.

Bruce Kutter, Professor Emeritus, obtained his BS (1977) and MS (1978) in Civil Engineering from the University of California, Davis, and his MPhil (1979) and PhD (1983) from Cambridge University. In 1983 he returned to Davis to serve on the faculty in Civil Engineering. He served as Associate Director (13 years) and Director (13 years) of the UC Davis Center for Geotechnical Modeling (CGM). During his tenure, the CGM established one of the world’s premier geotechnical centrifuge modeling facilities. Among various honors, he received the Hogentogler Award from ASTM, was selected as the 2nd Schofield Lecturer by the ISSMGE, and received the Norman Medal, Wellington Prize, and H. Bolton Seed Medal from ASCE.

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