Centrifuge modeling of offshore wind foundations under earthquake loading

Hao Yu, Xiangwu Zeng, Frank H. Neff, Bo Li, Jijian Lian

Research output: Contribution to journalArticlepeer-review

67 Scopus citations

Abstract

The construction of large offshore wind turbines in seismic active regions has great demand on the design of foundations. The occurrence of soil liquefaction under seismic motion will affect the stability of the foundations and consequently the operation of the turbines. In this study, a group of earthquake centrifuge tests was performed on wind turbine models with gravity and monopile foundations, respectively, to exam their seismic response. It was found that the seismic behavior of models was quite different in the dry or saturated conditions. Each type of foundation exhibited distinct response to the earthquake loading, especially in the offshore environment. In the supplementary tests, several remediation methods were evaluated in order to mitigate the relatively large lateral displacement of pile foundation (by fixed-end pile and multi-pile foundation) and excessive settlement of gravity foundation (by densification, stone column, and cementation techniques).

Original languageEnglish
Pages (from-to)402-415
Number of pages14
JournalSoil Dynamics and Earthquake Engineering
Volume77
DOIs
StatePublished - 1 Oct 2015

Keywords

  • Cementation
  • Centrifuge test
  • Densification
  • Foundation
  • Liquefaction
  • Liquefaction mitigation technique
  • Offshore wind turbine
  • Seismic response
  • Stone column

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