Proceedings of the
8th International Symposium on Geotechnical Safety and Risk (ISGSR)
14 – 16 December 2022, Newcastle, Australia
Editors: Jinsong Huang, D.V. Griffiths, Shui-Hua Jiang, Anna Giacomini, Richard Kelly
doi:10.3850/978-981-18-5182-7_17-008-cd
Linear-System-Type Surrogate Model for Large-Scale Earth-Retaining Work Based on Dynamic Mode Decomposition
1Department of Civil and Environmental Engineering, Tohoku University, 6-6-06 Aramaki Aoba, Aoba, Sendai, Miyagi 980-8579, Japan.
2Civil Engineer, Civil Engineering Group, Urban and Civil Project Department, Nikken Sekkei Ltd., 3-6-14, Minamihonmachi, Chuo-ku, Osaka 541-0054, Japan.
ABSTRACT
In this study, we developed a surrogate model that could efficiently calculate the displacement behavior of a wall to construct a robust design method and real-time control system for earth-retaining walls in large-scale underground spaces. Based on the construction of a dynamic mode decomposition approximation model with a focus on the cantilever state, we constructed a model that enables proxy calculations for various conditions using the stiffness matrix of the beam-spring model for conversion to various strut placement situations. Finally, the effectiveness of the surrogate model was verified from the viewpoints of the reproducibility of the elastoplasticity analysis results based on a simple problem setup and connectivity to the optimal design based on the optimization calculations of the strut placement.
Keywords: dynamic mode decomposition, reduced-order models, inverse analysis, time-series analysis, real-time control
