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Finite element modelling of the uplift behaviour of screw piles in sand

Finite element modelling of the uplift behaviour of screw piles in sand
Finite element modelling of the uplift behaviour of screw piles in sand
In this paper a simplified procedure to incorporate some installations effects into the numerical finite element modelling of screw pile uplift is presented. The procedure consists of the approximation of the installation phase through 1) the application of a compression loading corresponding to successive embedment depths, 2) the use of modified soil properties over a disturbed zone. Pre-defined failure mechanisms are added to introduce some weakened zones due to either soil disturbance or strain-localisation. The results of numerical simulations are compared to a centrifuge test undertaken at the University of Dundee. The simulation considering an inclined failure mechanism and the simulated installation better captures the uplift capacity and initial stiffness.
Screw piles, finite element analysis, UPLIFT, Sand
Cerfontaine, Benjamin
0730daf4-9d6b-4f2d-a848-a3fc54505a02
Brown, Michael
4ae2d5b6-e351-419b-9fe7-a17f0868e779
Knappett, Jonathan
cda30027-553d-4310-8a05-e48d8989a545
Davidson, Craig
972704f2-5a32-4469-ad4f-358c60ef8de2
Cerfontaine, Benjamin
0730daf4-9d6b-4f2d-a848-a3fc54505a02
Brown, Michael
4ae2d5b6-e351-419b-9fe7-a17f0868e779
Knappett, Jonathan
cda30027-553d-4310-8a05-e48d8989a545
Davidson, Craig
972704f2-5a32-4469-ad4f-358c60ef8de2

Cerfontaine, Benjamin, Brown, Michael, Knappett, Jonathan and Davidson, Craig (2019) Finite element modelling of the uplift behaviour of screw piles in sand. In 1st International Symposium on Screw Piles for Energy Applications. 7 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

In this paper a simplified procedure to incorporate some installations effects into the numerical finite element modelling of screw pile uplift is presented. The procedure consists of the approximation of the installation phase through 1) the application of a compression loading corresponding to successive embedment depths, 2) the use of modified soil properties over a disturbed zone. Pre-defined failure mechanisms are added to introduce some weakened zones due to either soil disturbance or strain-localisation. The results of numerical simulations are compared to a centrifuge test undertaken at the University of Dundee. The simulation considering an inclined failure mechanism and the simulated installation better captures the uplift capacity and initial stiffness.

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More information

Published date: 27 May 2019
Additional Information: This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 753156. The authors would also like to acknowledge the support of EPSRC (Grant no. EP/N006054/1: Supergen Wind Hub: Grand Challenges Project: Screw piles for wind energy foundations)
Keywords: Screw piles, finite element analysis, UPLIFT, Sand

Identifiers

Local EPrints ID: 444209
URI: http://eprints.soton.ac.uk/id/eprint/444209
PURE UUID: d27f897b-bf6f-4861-b64f-8ad4678c0a9c
ORCID for Benjamin Cerfontaine: ORCID iD orcid.org/0000-0002-4833-9412

Catalogue record

Date deposited: 01 Oct 2020 16:34
Last modified: 02 Oct 2020 01:53

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Contributors

Author: Michael Brown
Author: Jonathan Knappett
Author: Craig Davidson

University divisions

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