Physics-based and data-driven modeling for stability evaluation of buried structures in natural clays

Lai, Fengwen and Shiau, Jim ORCID: https://orcid.org/0000-0002-9220-3184 and Keawsawasvong, Suraparb and Chen, Fuquan and Banyong, Rungkhun and Seehavong, Sorawit (2023) Physics-based and data-driven modeling for stability evaluation of buried structures in natural clays. Journal of Rock Mechanics and Geotechnical Engineering. ISSN 1674-7755

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Abstract

This study presents a hybrid framework to predict stability solutions of buried structures under active trapdoor conditions in natural clays with anisotropy and heterogeneity by combining physics-based and data-driven modeling. Finite-element limit analysis (FELA) with a newly developed anisotropic undrained shear (AUS) failure criterion is used to identify the underlying active failure mechanisms as well as to develop a numerical (physics-based) database of stability numbers for both planar and circular trapdoors. Practical considerations are given for natural clays to three linearly increasing shear strengths in compression, extension, and direct simple shear in the AUS material model. The obtained numerical solutions are compared and validated with published solutions in the literature. A multivariate adaptive regression splines (MARS) algorithm is further utilized to learn the numerical solutions to act as fast FELA data-driven surrogates for stability evaluation. The current MARS-based modeling provides both relative importance index and accurate design equations that can be used with confidence by practitioners.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current – Faculty of Health, Engineering and Sciences - School of Engineering (1 Jan 2022 -)
Faculty/School / Institute/Centre: Current – Faculty of Health, Engineering and Sciences - School of Engineering (1 Jan 2022 -)
Date Deposited: 11 Aug 2022 23:15
Last Modified: 11 Aug 2022 23:15
Uncontrolled Keywords: Buried structures; Natural clays; Active trapdoor; Undrained stability; Multivariate adaptive regression splines (MARS); Finite element limit analysis (FELA)
Fields of Research (2020): 40 ENGINEERING > 4005 Civil engineering > 400502 Civil geotechnical engineering
Identification Number or DOI: https://doi.org/10.1016/j.jrmge.2022.07.006
URI: http://eprints.usq.edu.au/id/eprint/50902

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