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

Benjamin Cerfontaine; Jonathan Knappett; Michael Brown; Aaron S. Bradsaw

doi:10.1016/j.compgeo.2019.01.007

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

Civil Engineering

Research output: Contribution to journal › Article › peer-review

37 Citations (Scopus)

469 Downloads (Pure)

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 language	English
Pages (from-to)	34-45
Number of pages	12
Journal	Computers and Geotechnics
Volume	109
Early online date	24 Jan 2019
DOIs	https://doi.org/10.1016/j.compgeo.2019.01.007
Publication status	Published - May 2019

Keywords

Anchors
Design
Failure mechanism
Finite element analysis
Sand

ASJC Scopus subject areas

Geotechnical Engineering and Engineering Geology
Computer Science Applications

Access to Document

10.1016/j.compgeo.2019.01.007

Author Accepted ManuscriptAccepted author manuscript, 2.63 MBLicence: CC BY-NC-ND

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 Sk{\L}odowska-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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language = "English",

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pages = "34--45",

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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).

PY - 2019/5

Y1 - 2019/5

N2 - 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.

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.

KW - Anchors

KW - Design

KW - Failure mechanism

KW - Finite element analysis

KW - Sand

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DO - 10.1016/j.compgeo.2019.01.007

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SN - 0266-352X

VL - 109

SP - 34

EP - 45

JO - Computers and Geotechnics

JF - Computers and Geotechnics

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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

Abstract

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