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

Benjamin Cerfontaine (Lead / Corresponding author), Jonathan Knappett, Michael Brown, Aaron S. Bradsaw

Research output: Contribution to journalArticle

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.

Original languageEnglish
Pages (from-to)34-45
Number of pages12
JournalComputers and Geotechnics
Volume109
Early online date24 Jan 2019
DOIs
Publication statusPublished - May 2019

Fingerprint

failure mechanism
Formability
Anchors
anchor
Stress concentration
Sand
Soils
sand
soil
stress field
soil property
friction
uplift
Friction
Finite element method
effect
distribution

Keywords

  • Anchors
  • Design
  • Failure mechanism
  • Finite element analysis
  • Sand

Cite this

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title = "Effect of soil deformability on the failure mechanism of shallow plate or screw anchors in sand",
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.",
keywords = "Anchors, Design, Failure mechanism, Finite element analysis, Sand",
author = "Benjamin Cerfontaine and Jonathan Knappett and Michael Brown and Bradsaw, {Aaron S.}",
note = "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).",
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AU - Cerfontaine, Benjamin

AU - Knappett, Jonathan

AU - Brown, Michael

AU - Bradsaw, Aaron S.

N1 - 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).

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AB - 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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