Projects per year
Abstract
Plate and screw anchors provide a significant uplift capacity and have multiple applications in both onshore and offshore geotechnical engineering. Uplift design methods are mostly based on semi-empirical approaches assuming a failure mechanism, a normal and a shear stress distribution at failure and empirical factors back-calculated against experimental data. However, these design methods are shown to under- or overpredict most of the existing larger scale experimental tests. Numerical FE simulations are undertaken to provide new insight into the failure mechanism and stress distribution which should be considered in anchor design in dense sand. Results show that a conical shallow wedge whose inclination to the vertical direction is equal to the dilation angle is a good approximation of the failure mechanism in sand. This shallow mechanism has been observed in each case for relative embedment ratios (depth/diameter) ranging from 1 to 9. However, the stress distribution varies non-linearly with depth, due to the soil deformability and progressive failure. A sharp peak of normal and shear stress can be identified close to the anchor edge, before a gradual decrease with increasing distance along the shear plane. The peak stress magnitude increases almost linearly with embedment depth at larger relative embedment ratios. Although further research is necessary, these results lay the basis for the development of a new generation of design criteria for determining anchor capacity at the ultimate limiting state.
Original language | English |
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Title of host publication | 7th International Symposium on Deformation Characteristics of Geomaterials (IS-Glasgow 2019) |
Editors | A Tarantino , E Ibraim |
Publisher | EDP Sciences |
Pages | 1-6 |
Number of pages | 6 |
Volume | 92 |
Edition | 2019 |
ISBN (Electronic) | 9782759890644 |
ISBN (Print) | 978-2-7598-9064-4 |
DOIs | |
Publication status | Published - 25 Jun 2019 |
Event | 7th International Symposium on Deformation Characteristics of Geomaterials (IS-Glasgow 2019) - Strathclyde's Technology & Innovation Centre, Glasgow, United Kingdom Duration: 26 Jun 2019 → 28 Jul 2019 https://www.is-glasgow2019.org.uk/ |
Publication series
Name | E3S Web of Conferences |
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Volume | 92 |
ISSN (Print) | 2555-0403 |
ISSN (Electronic) | 2267-1242 |
Conference
Conference | 7th International Symposium on Deformation Characteristics of Geomaterials (IS-Glasgow 2019) |
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Country/Territory | United Kingdom |
City | Glasgow |
Period | 26/06/19 → 28/07/19 |
Internet address |
Fingerprint
Dive into the research topics of 'Design of plate and screw anchors in dense sand: failure mechanism, capacity and deformation'. Together they form a unique fingerprint.Projects
- 1 Finished
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Optimised screw pile design for offshore jacket foundations in medium-dense sand
Cerfontaine, B., Brown, M., Davidson, C., Sharif, Y., Huisman, M. & Ottolini, M., Jun 2022, In: Geotechnique Letters. 12, 2, p. 1-6 6 p.Research output: Contribution to journal › Article › peer-review
Open AccessFile46 Downloads (Pure) -
Overflighting screw piles in sand, a detrimental effect?
Cerfontaine, B., Brown, M., Knappett, J., Sharif, Y. & Davidson, C., 5 May 2022, p. 1081-1086.Research output: Contribution to conference › Paper › peer-review
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Physical modelling to demonstrate the feasibility of screw piles for offshore jacket supported wind energy structures
Davidson, C., Brown, M., Cerfontaine, B., Knappett, J., Brennan, A., Al-Baghdadi, T., Augarde, C., Coombs, W. M., Wang, L., Blake, A., Richards, D. & Ball, J. D., Feb 2022, In: Geotechnique. 72, 2, p. 108-126 19 p.Research output: Contribution to journal › Article › peer-review
Open AccessFile9 Citations (Scopus)161 Downloads (Pure)
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Invited Speaker, SUT OSIG One day seminar: Development and investigation of silent foundations for offshore renewable energy
Michael Brown (Speaker)
16 Sep 2021Activity: Talk or presentation types › Invited talk
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Keynote lecture First International Workshop on Future Application of Screw Piles (IWFASP 2019) At: IIT Bhubaneshwar, India
Michael Brown (Keynote speaker)
7 Dec 2019Activity: Talk or presentation types › Keynote
File
Press / Media
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Pioneering UMACK mooring and anchoring project partners with University of Dundee
14/06/21
1 Media contribution
Press/Media: Research
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UMACK bolsters anchoring expertise with University of Dundee partnership
14/06/21
1 item of Media coverage
Press/Media: Research
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Dundee University engineers hope to silence offshore construction
28/01/21
1 item of Media coverage
Press/Media: Research