Numerical study on the deformation response of the monopod bucket foundation under lateral loads

Yu-Shu Kuo, Ting Ting Wang, Yu Hsiu Tseng

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The monopod bucket foundation is one of the promising foundation types for the offshore wind turbine. An accumulated deformation of foundation should not exceed the tolerance value and should be within the service limit state requirement. Under long-term cyclic loads from wave, current and wind, it is essential to evaluate the stability and permanent deformation of the foundation during 20-year service life of offshore wind turbine. The current semi-empirical methods mostly used for estimating accumulated rotation are proposed by Zhu et al. (2013) and Foglia et al. (2014). These methods consist 2 parameters, Tb (dimensionless ratio of maximum cyclic moment) and Tc (dimensionless ratio of minimum cyclic moment). The results of model tests show that Tb and Tc are related to Dr (relative density of soil). However, the suggested method to determine the deformation parameters Tb and Tc is still not presented. In this study, a numerical model programmed with finite element method collaborated with stiffness degradation model proposed by Achmus et al. (2009) is established to duplicate the deformation of monopod bucket foundation in model test results of Foglia et al. (2014). The relationship between Dr and 2 deformation parameters, Tb and Tc, can be determined by the numerical model presented in this study.

Original languageEnglish
Title of host publicationProceedings of the 28th International Ocean and Polar Engineering Conference, ISOPE 2018
PublisherInternational Society of Offshore and Polar Engineers
Pages342-349
Number of pages8
ISBN (Print)9781880653876
Publication statusPublished - 2018 Jan 1
Event28th International Ocean and Polar Engineering Conference, ISOPE 2018 - Sapporo, Japan
Duration: 2018 Jun 102018 Jun 15

Publication series

NameProceedings of the International Offshore and Polar Engineering Conference
Volume2018-June
ISSN (Print)1098-6189
ISSN (Electronic)1555-1792

Other

Other28th International Ocean and Polar Engineering Conference, ISOPE 2018
CountryJapan
CitySapporo
Period18-06-1018-06-15

Fingerprint

Offshore wind turbines
Numerical models
Cyclic loads
Service life
Stiffness
Soils
Finite element method
Degradation

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Ocean Engineering
  • Mechanical Engineering

Cite this

Kuo, Y-S., Wang, T. T., & Tseng, Y. H. (2018). Numerical study on the deformation response of the monopod bucket foundation under lateral loads. In Proceedings of the 28th International Ocean and Polar Engineering Conference, ISOPE 2018 (pp. 342-349). (Proceedings of the International Offshore and Polar Engineering Conference; Vol. 2018-June). International Society of Offshore and Polar Engineers.
Kuo, Yu-Shu ; Wang, Ting Ting ; Tseng, Yu Hsiu. / Numerical study on the deformation response of the monopod bucket foundation under lateral loads. Proceedings of the 28th International Ocean and Polar Engineering Conference, ISOPE 2018. International Society of Offshore and Polar Engineers, 2018. pp. 342-349 (Proceedings of the International Offshore and Polar Engineering Conference).
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Kuo, Y-S, Wang, TT & Tseng, YH 2018, Numerical study on the deformation response of the monopod bucket foundation under lateral loads. in Proceedings of the 28th International Ocean and Polar Engineering Conference, ISOPE 2018. Proceedings of the International Offshore and Polar Engineering Conference, vol. 2018-June, International Society of Offshore and Polar Engineers, pp. 342-349, 28th International Ocean and Polar Engineering Conference, ISOPE 2018, Sapporo, Japan, 18-06-10.

Numerical study on the deformation response of the monopod bucket foundation under lateral loads. / Kuo, Yu-Shu; Wang, Ting Ting; Tseng, Yu Hsiu.

Proceedings of the 28th International Ocean and Polar Engineering Conference, ISOPE 2018. International Society of Offshore and Polar Engineers, 2018. p. 342-349 (Proceedings of the International Offshore and Polar Engineering Conference; Vol. 2018-June).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Kuo Y-S, Wang TT, Tseng YH. Numerical study on the deformation response of the monopod bucket foundation under lateral loads. In Proceedings of the 28th International Ocean and Polar Engineering Conference, ISOPE 2018. International Society of Offshore and Polar Engineers. 2018. p. 342-349. (Proceedings of the International Offshore and Polar Engineering Conference).