Hydrodynamic Real-Time Hybrid Simulation Demonstrated for Cascading Seismic and Tsunami Events
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 149, Issue 1
Abstract
Gathering data for cascading seismic and tsunami events is difficult due to space constraints in existing experimental facilities, the application of scaling laws for both the fluid and structure, and limitations of computational software in simulating multiple hazards within the same analysis. To overcome these limitations, this study demonstrates the feasibility of a real-time hybrid simulation testing method to enhance wave–structure interaction simulations. While real-time hybrid simulations have been utilized for structures subjected to seismic events for decades, considerations for hybrid testing make its application to hydrodynamic problems challenging, including testing in wet or submersible environments and satisfying similitude time constraints. A cylindrical bridge pier specimen connected to a three-dimensional numerical bridge model was subjected to cascading seismic and tsunami events deploying a three-loop hardware architecture for real-time hybrid simulation. The domain was partitioned such that the wave–structure interaction on the bridge pier was physically tested in a wave flume and coupled to a numerical model of the remaining bridge components. To simulate existing damage, seismic loading was numerically applied to the hybrid model prior to the physical wave loading. Results illustrate that this simulation approach is feasible for future investigations using real-time hybrid simulation.
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Acknowledgments
Special thanks to Shawn Gao of MTS Systems for their support of the testing program. Numerous other individuals have been involved in discussions of this work, including Dr. Denis Istrati (University of Nevada, Reno) and Dr. James Ricles (Lehigh University). The research reported herein was supported by a research grant titled, “Real-time hybrid experimental–numerical simulation of bridge infrastructure subject to cascading earthquake-tsunami hazards,” funded by the Pacific Northwest Transportation Consortium (PacTrans). Laboratory time in the Large Wave Flume at OSU was supported by the OSU College of Engineering Lab Days. Any opinions, findings, and conclusions or recommendations expressed in this paper are those of the authors and do not necessarily reflect the views of PacTrans or other participants in the research program.
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Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 149 • Issue 1 • January 2023
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© 2022 American Society of Civil Engineers.
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Received: Jan 30, 2022
Accepted: Aug 17, 2022
Published online: Nov 7, 2022
Published in print: Jan 1, 2023
Discussion open until: Apr 7, 2023
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