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Influence of the Skirt on the Seismic Response of Bucket Foundations for Offshore Wind Tower Using Dynamic Centrifuge Model Tests

[+] Author Affiliations
Leonardo T. Olalo, Yun Wook Choo

Kongju National University, Cheonan, Korea

Kyung-Tae Bae

DAEWOO E&C, Suwon, Korea

Paper No. OMAE2016-54739, pp. V001T10A005; 6 pages
doi:10.1115/OMAE2016-54739
From:
  • ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 1: Offshore Technology; Offshore Geotechnics
  • Busan, South Korea, June 19–24, 2016
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-4992-7
  • Copyright © 2016 by ASME

abstract

The influence of skirt to the seismic behavior of the bucket foundation supporting offshore wind turbine was analyzed by performing dynamic centrifuge tests. Three types of bucket foundation with aspect ratios (length of the skirt/diameter of the foundation) of 0.50, 0.75 and 1.00 were tested. Kobe and El Centro earthquakes were used as excitation patterns. Clean sand was used to simulate the soil deposit. Peak acceleration, settlement and tilting of foundations on drained sand condition were analyzed and compared. The bucket foundation with the longest skirt accelerated the most at the platform level and experienced the least degree of tilting and normalized settlement. Obtained results were expected to contribute for a better understanding on the performance of bucket foundation during an earthquake.

Copyright © 2016 by ASME

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