Effect of soil deformability on the failure mechanism of shallow plate or screw anchors in sand

Cerfontaine, Benjamin, Knappett, Jonathan, Brown, Michael and Bradsaw, Aaron S. (2019) Effect of soil deformability on the failure mechanism of shallow plate or screw anchors in sand. Computers and Geotechnics, 109, 34-45. (doi:10.1016/j.compgeo.2019.01.007).

Record type: Article

Abstract

Most analytical approaches for the design of shallow plate and screw anchors in tension are based on the limit equilibrium of a rigid soil wedge for which a horizontal stress distribution acting on the failure plane is assumed. Finite element analysis for a wide range of soil properties was carried out to identify the shape of the failure mechanism and to study the stress distribution at failure. Results show that soil deformation modifies the stress field around the anchor and increases the uplift capacity. A semi-analytical approach is proposed to describe this stress distribution, based on peak friction angle.

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Accepted/In Press date: 8 January 2019

e-pub ahead of print date: 24 January 2019

Published date: May 2019

Additional Information: Funding: EU H2020 Marie SkŁodowska-Curie Actions Individual Fellowships SAFS – Development of Screw Anchors for Floating marine renewable energy System arrays incorporating anchor sharing. H2020-MSCA-IF-2016, Grant no. 753156 (08/17-07/19).

Keywords: Anchors, Design, Failure mechanism, Finite element analysis, Sand