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Application of the PISA design model to monopiles embedded in layered soils

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Title: Application of the PISA design model to monopiles embedded in layered soils
Authors: Burd, H
Abadie, C
Byrne, B
Houlsby, G
Martin, C
McAdam, R
Jardine, R
Pedro, A
Potts, D
Taborda, D
Zdravkovic, L
Andrade, M
Item Type: Journal Article
Abstract: The PISA design model is a procedure for the analysis of monopile foundations for offshore wind turbine applications. This design model has been previously calibrated for homogeneous soils; this paper extends the modelling approach to the analysis of monopiles installed at sites where the soil profile is layered. We describe a computational study on monopiles embedded in layered soil configurations comprising selected combinations of soft and stiff clay and sand at a range of relative densities. The study comprises (i) analyses of monopile behaviour using detailed three dimensional (3D) finite element analysis, and (ii) calculations employing the PISA design model. Results from the 3D analyses are used to explore the various influences that soil layering has on the performance of the monopile. The fidelity of the PISA design model is assessed by comparisons with data obtained from equivalent 3D finite element analyses, demonstrating a good agreement in most cases. This comparative study demonstrates that the PISA design model can be applied successfully to layered soil configurations, except in certain cases involving combinations of very soft clay and very dense sand.
Issue Date: Nov-2020
Date of Acceptance: 27-Jul-2020
URI: http://hdl.handle.net/10044/1/80939
DOI: 10.1680/jgeot.20.PISA.009
ISSN: 1021-8637
Publisher: https://www.icevirtuallibrary.com/doi/10.1680/jgeot.20.PISA.009
Start Page: 1067
End Page: 1082
Journal / Book Title: Geotechnique
Volume: 70
Issue: 11
Sponsor/Funder: DONG Energy Wind Power A/S
DONG Energy Wind Power A/S
DONG Energy Wind Power A/S
Geotechnical Consulting Group
Funder's Grant Number: Layered Soils Extension Projec
030-13-0133
030-13-0133
CISM_P60087
Publication Status: Published
Online Publication Date: 2020-09-14
Appears in Collections:Civil and Environmental Engineering
Geotechnics
Faculty of Engineering



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