Details
| Original language | English |
|---|---|
| Pages (from-to) | 357-363 |
| Number of pages | 7 |
| Journal | Journal of Geotechnical and Geoenvironmental Engineering |
| Volume | 138 |
| Issue number | 3 |
| Publication status | Published - 22 Jul 2011 |
Abstract
Monopiles are used as foundation structures for offshore wind energy towers. To ensure stable behavior of the monopile under cyclic loading conditions, a minimum embedded length is usually required. For this, different design criteria are used, some of which result in very large embedded depths for large-diameter monopiles. The suitability of these criteria is tested by means of numerical simulations. To account for cyclic loading, a new approach called the stiffness degradation method is applied. The results of a parametric study show that the design criteria used can indeed ensure optimum pile performance under static and cyclic loads. It is recommended that the requirement of a critical pile length, which leads to the minimum pile deflection under extreme load, is used as a design criterion. For the cases considered, this requirement results in only slightly greater cyclic deformations compared to the optimum case of very long piles. A further optimization of the required monopile length with respect to cyclic loading is possible, but requires specific consideration of cyclic behavior, as is done in this paper.
Keywords
- Cyclic loads, Finite element method, Monopiles, Numerical analysis, Offshore structures, Piles
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geotechnical Engineering and Engineering Geology
- Environmental Science(all)
- General Environmental Science
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In: Journal of Geotechnical and Geoenvironmental Engineering, Vol. 138, No. 3, 22.07.2011, p. 357-363.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Minimum embedded length of cyclic horizontally loaded monopiles
AU - Kuo, Yu Shu
AU - Achmus, Martin
AU - Abdel-Rahman, Khalid
PY - 2011/7/22
Y1 - 2011/7/22
N2 - Monopiles are used as foundation structures for offshore wind energy towers. To ensure stable behavior of the monopile under cyclic loading conditions, a minimum embedded length is usually required. For this, different design criteria are used, some of which result in very large embedded depths for large-diameter monopiles. The suitability of these criteria is tested by means of numerical simulations. To account for cyclic loading, a new approach called the stiffness degradation method is applied. The results of a parametric study show that the design criteria used can indeed ensure optimum pile performance under static and cyclic loads. It is recommended that the requirement of a critical pile length, which leads to the minimum pile deflection under extreme load, is used as a design criterion. For the cases considered, this requirement results in only slightly greater cyclic deformations compared to the optimum case of very long piles. A further optimization of the required monopile length with respect to cyclic loading is possible, but requires specific consideration of cyclic behavior, as is done in this paper.
AB - Monopiles are used as foundation structures for offshore wind energy towers. To ensure stable behavior of the monopile under cyclic loading conditions, a minimum embedded length is usually required. For this, different design criteria are used, some of which result in very large embedded depths for large-diameter monopiles. The suitability of these criteria is tested by means of numerical simulations. To account for cyclic loading, a new approach called the stiffness degradation method is applied. The results of a parametric study show that the design criteria used can indeed ensure optimum pile performance under static and cyclic loads. It is recommended that the requirement of a critical pile length, which leads to the minimum pile deflection under extreme load, is used as a design criterion. For the cases considered, this requirement results in only slightly greater cyclic deformations compared to the optimum case of very long piles. A further optimization of the required monopile length with respect to cyclic loading is possible, but requires specific consideration of cyclic behavior, as is done in this paper.
KW - Cyclic loads
KW - Finite element method
KW - Monopiles
KW - Numerical analysis
KW - Offshore structures
KW - Piles
UR - http://www.scopus.com/inward/record.url?scp=84859327505&partnerID=8YFLogxK
U2 - 10.1061/(ASCE)GT.1943-5606.0000602
DO - 10.1061/(ASCE)GT.1943-5606.0000602
M3 - Article
AN - SCOPUS:84859327505
VL - 138
SP - 357
EP - 363
JO - Journal of Geotechnical and Geoenvironmental Engineering
JF - Journal of Geotechnical and Geoenvironmental Engineering
SN - 1090-0241
IS - 3
ER -