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2020 Vol.36, Issue 2 Preview Page

Research Article

Effect of Lateral Load-Moment Combination on p-y Curves of Large Diameter Monopile for Offshore Wind Turbine: Centrifuge Model Tests

해상풍력 대구경 모노파일의 p-y 곡선에 대한 수평-모멘트 조합의 영향: 원심모형실험

Min Jy Lee1
,
Jong Seok Yun2
,
Yun Wook Choo3*
이 민지1
,
윤 종석2
,
추 연욱3*
1Member, Graduate Student, Dept. of Civil Environmental Engrg., Kongju National Univ.
2Member, Graduate Student, Dept. of Civil Environmental Engrg., Kongju National Univ.
3Member, Prof., Dept. of Civil Environmental Engrg., Kongju National Univ.
1정회원, 공주대학교 건설환경공학과 석사과정
2정회원, 공주대학교 건설환경공학과 박사과정
3정회원, 공주대학교 건설환경공학부 교수
* Corresponding Author
29 February 2020. pp. 29-42
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Abstract

본 연구에서는 모래지반에 설치된 해상풍력 지지용 직경 7m 모노파일의 p-y 곡선에 대한 수평하중-모멘트 조합의 영향을 분석하기 위하여 원심모형실험을 수행하였다. 이를 위하여 원심모형실험시스템을 구축하였고, 다수의 게이지를 부착한 계측용 모노파일 모형을 사용하여 68.83g에서 원심모형실험을 수행하였다. 지표면으로부터 직경의 1배와 직경의 5배 높이에서 하중재하를 하는 2개의 수평하중-모멘트 조합으로 재하시험이 수행되었다. 모형지반은 중간밀도의 모래로 조성되었다. 원심모형실험결과로부터 실험 p-y 곡선을 산정하였고 기존 문헌의 p-y 곡선과 비교하였다. 결과적으로 p-y 곡선에 대한 모멘트 조합의 영향이 미미함을 확인하였다. 또한, 근입깊이가 모노파일의 p-y 곡선에 영향을 미치는 것을 확인하였다.

In this study, centrifuge tests were performed to investigate the effect of the lateral load-moment combination on the p-y curves for 7 m-diameter monopiles installed in sand for offshore wind turbine. For the objectives, a centrifuge testing system was developed and tests were conducted at an acceleration of 68.83 g using well-instrumented model monopiles under two different lateral load-moment combinations simulated by different loading heights: 1 and 5 times monopile diameter from the ground surface. The sand was prepared as medium loose sand. Based on the centrifuge test results, the experimental p-y curves were evaluated and compared with previous literatures including API codes. The experimental results reveal that the p-y curves were little influenced by the combination of lateral load and moment. It was also found that the embedded length affects p-y curves.

Keywords
Lateral response
Lateral load-moment combination
Monopile
Offshore foundations
Offshore wind turbines
p-y relationship

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Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 36
  • No :2
  • Pages :29-42
  • Received Date : 2019-12-16
  • Revised Date : 2020-02-16
  • Accepted Date : 2020-02-17
  • DOI :https://doi.org/10.7843/kgs.2020.36.2.29
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