Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Seismic Fragility for 5MW Offshore Wind Turbine using Pushover Analysis

Pushover 해석을 이용한 5MW급 해상풍력터빈의 지진취약도

  • Lee, Sang-Geun (Deptartment of Ocean Science and Engineering, Kunsan National University) ;
  • Kim, Dong-Hyawn (Deptartment of Coastal Construction Engineering, Kunsan National University) ;
  • Yoon, Gil-Lim (Coastal Engineering and Ocean Energy Research Department, KORDI)
  • 이상근 (군산대학교 대학원 해양산업공학과) ;
  • 김동현 (군산대학교 해양건설공학과) ;
  • 윤길림 (한국해양과학기술원 연안개발에너지부)
  • Received : 2012.12.26
  • Accepted : 2013.08.22
  • Published : 2013.08.31
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Abstract

Seismic fragility curves for an offshore wind-turbine structure were obtained. The dynamic response of an offshore wind turbine was analyzed by considering the nonlinear behavior of layered soil and the added mass effect due to seawater. A pile-soil interaction effect was considered by using nonlinear p-y, t-z curves. In the analysis, the amplification effect of ground acceleration through layered soil was considered by applying ground motion to each of the soil layers. The vertical variation in ground motion was found by one-dimensional free-field analysis of ground soils. Fragility curves were determined by damage levels in terms of tower stress and nacelle displacements that were found from static pushover analysis of the wind-turbine structure.

Keywords

References

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  1. A Study on the Natural Frequency of Wind Turbine Tower Regarding to Modeling Method vol.16, pp.3, 2015, https://doi.org/10.5762/KAIS.2015.16.3.2272