풍력에너지저널 (Journal of Wind Energy)

  • 제13권3호
  • /
  • Pages.22-32
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  • 2022
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  • 2093-5099(pISSN)
  • /
  • 2733-9467(eISSN)
한국풍력에너지학회 (Korea Wind Energy Association)
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해체가 용이한 세그먼트형 이중벽 모노파일에 대한 수치해석 연구

Numerical Investigation of Segment Type Double-wall Monopile for Easy Decommissioning

  • 김정수 (한국건설기술연구원, 미래스마트건설연구본부) ;
  • 김재현 (강원대학교, 문화예술.공과대학 건축토목환경공학부 토목공학전공) ;
  • 김규원 (포어시스, 기술개발사업부) ;
  • 황성필 (한국건설기술연구원, 지반연구본부 )
  • 투고 : 2022.05.18
  • 심사 : 2022.07.18
  • 발행 : 2022.09.30
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초록

Conventionally, a monopile that has reached the end of its design life is required to be removed. While monopiles have been left on site due to economic and technical reasons, cases of decommissioning monopoles have recently been reported, and a decommissioning market is emerging. This paper introduces a new type of monopile with decreased pull-out resistance by prior lifting up of a wedge segment installed on the outer wall of the monopile; consequently, the monopile can be dismantled easily from the operation site. The study conducted several numerical investigations, using finite element analysis, of the effect of segment pull-out for the monopile. After pulling out several segment sizes in the numerical model represented by soil element deletion corresponding to the segment volumes, the pull-out forces were compared to those of the conventional monopile. The results showed that for a segment with a thickness of 5 cm and circumferential angle of 30°, the pull-out resistance of the proposed monopile was reduced by 32.5% relative to that of a conventional monopile. Also, the results indicated that an increase in the segment angle was a more effective way to reduce resistance than that of the thickness.

키워드

과제정보

본 논문은 정부(과학기술정보통신부)의 재원으로 한국연구재단(No. NRF-2021R1C1C1011540)과 한국건설기술연구원 주요사업 "지속가능한 해양공간 활용을 위한 신형식 말뚝기초 기술개발"(20200390-001)의 지원을 받아 수행된 연구입니다.

참고문헌

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