Bearing Capacity of Ring Foundations on Anisotropic and Heterogenous Clays: FEA, NGI‑ADP, and MARS

Lai, Van Qui and Shiau, Jim ORCID: https://orcid.org/0000-0002-9220-3184 and Keawsawasvong, Suraparb and Tran, Duy Tan (2022) Bearing Capacity of Ring Foundations on Anisotropic and Heterogenous Clays: FEA, NGI‑ADP, and MARS. Geotechnical and Geological Engineering. pp. 1-16. ISSN 0960-3182

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Abstract

Axisymmetric solutions for the bearing capacity of ring foundation resting on anisotropic and heterogenous clays are presented in this paper using finite element analysis (FEA). The NGI-ADP model in PLAXIS FEA, a widely used anisotropic soil model, is adopted to study the stability responses of ring foundations, with special consideration given to the effects of increasing undrained shear strength with the depth. Numerical results are formulated in terms of a dimensionless stability number (bearing capacity ratio) that is a function of three dimensionless input parameters: namely, the ratio of inner and outer radius, the increasing strength gradient ratio, and the anisotropic shear strength ratio. The influence of each dimensionless input parameter on the bearing capacity ratio is investigated using design charts and failure mechanisms, and they are scored by relative importance indexes in multivariate adaptive regression splines (MARS) model—a machine learning approach. A highly accurate equation generated from the MARS model is proposed as an effective tool for engineering 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: 22 Apr 2022 01:49
Last Modified: 19 May 2022 02:27
Uncontrolled Keywords: Anisotropic; Bearing capacity factor; MARS model; NGI-ADP model; Ring foundation
Fields of Research (2020): 40 ENGINEERING > 4005 Civil engineering > 400502 Civil geotechnical engineering
Identification Number or DOI: https://doi.org/10.1007/s10706-022-02117-6
URI: http://eprints.usq.edu.au/id/eprint/47853

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