Details
| Original language | English |
|---|---|
| Pages (from-to) | 1570-1587 |
| Number of pages | 18 |
| Journal | Soils and foundations |
| Volume | 60 |
| Issue number | 6 |
| Early online date | 5 Nov 2020 |
| Publication status | Published - Dec 2020 |
Abstract
The design of monopile foundations for offshore wind turbine structures is dominated by requirements resulting from serviceability and fatigue limit state. To fulfil these criteria, the load deflection-behaviour and therefore long-term accumulations of permanent deflections and rotations of the monopile foundation due to cyclic occurring wind and wave loads have to be predicted. In this paper a brief overview on current design code practice as well as other proposed methods for the prediction of accumulated deflections or rotations is given. Further, the results of a systematic model test study dealing with the response of monopiles to lateral cyclic loading in medium dense sand at different cyclic load ratios, load eccentricities and pile embedment lengths are described and evaluated. The observations of the model test study are supplemented by results of a second test series involving the visualisation of displacement fields around laterally loaded piles by means of particle image velocimetry. Based on the findings and the results of previous experimental investigations, recommendations regarding the prediction of displacement accumulations for large diameter monopiles in sand are given.
Keywords
- 1g model tests, Lateral cyclic loading, Monopiles, Offshore wind turbine foundations, Particle image velocimetry, Pile deflection accumulation
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Earth and Planetary Sciences(all)
- Geotechnical Engineering and Engineering Geology
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In: Soils and foundations, Vol. 60, No. 6, 12.2020, p. 1570-1587.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - An experimental study on the parameters affecting the cyclic lateral response of monopiles for offshore wind turbines in sand
AU - Frick, Dennis
AU - Achmus, Martin
N1 - Funding Information: This study was carried out in the scope of the research project “Accumulation of lateral displacements of piles under general cyclic one- and two-way loading” (project no. 393683178) funded by German Research Foundation (DFG). The authors sincerely acknowledge DFG support.
PY - 2020/12
Y1 - 2020/12
N2 - The design of monopile foundations for offshore wind turbine structures is dominated by requirements resulting from serviceability and fatigue limit state. To fulfil these criteria, the load deflection-behaviour and therefore long-term accumulations of permanent deflections and rotations of the monopile foundation due to cyclic occurring wind and wave loads have to be predicted. In this paper a brief overview on current design code practice as well as other proposed methods for the prediction of accumulated deflections or rotations is given. Further, the results of a systematic model test study dealing with the response of monopiles to lateral cyclic loading in medium dense sand at different cyclic load ratios, load eccentricities and pile embedment lengths are described and evaluated. The observations of the model test study are supplemented by results of a second test series involving the visualisation of displacement fields around laterally loaded piles by means of particle image velocimetry. Based on the findings and the results of previous experimental investigations, recommendations regarding the prediction of displacement accumulations for large diameter monopiles in sand are given.
AB - The design of monopile foundations for offshore wind turbine structures is dominated by requirements resulting from serviceability and fatigue limit state. To fulfil these criteria, the load deflection-behaviour and therefore long-term accumulations of permanent deflections and rotations of the monopile foundation due to cyclic occurring wind and wave loads have to be predicted. In this paper a brief overview on current design code practice as well as other proposed methods for the prediction of accumulated deflections or rotations is given. Further, the results of a systematic model test study dealing with the response of monopiles to lateral cyclic loading in medium dense sand at different cyclic load ratios, load eccentricities and pile embedment lengths are described and evaluated. The observations of the model test study are supplemented by results of a second test series involving the visualisation of displacement fields around laterally loaded piles by means of particle image velocimetry. Based on the findings and the results of previous experimental investigations, recommendations regarding the prediction of displacement accumulations for large diameter monopiles in sand are given.
KW - 1g model tests
KW - Lateral cyclic loading
KW - Monopiles
KW - Offshore wind turbine foundations
KW - Particle image velocimetry
KW - Pile deflection accumulation
UR - http://www.scopus.com/inward/record.url?scp=85095590748&partnerID=8YFLogxK
U2 - 10.1016/j.sandf.2020.10.004
DO - 10.1016/j.sandf.2020.10.004
M3 - Article
AN - SCOPUS:85095590748
VL - 60
SP - 1570
EP - 1587
JO - Soils and foundations
JF - Soils and foundations
SN - 0038-0806
IS - 6
ER -