KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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Partial Safety Factor of Offshore Wind Turbine Pile Foundation in West-South Mainland Sea

서남해안 해상풍력단지 말뚝기초의 부분안전계수

  • 윤길림 (한국해양과학기술원 연안개발 에너지연구부) ;
  • 김선빈 (한국해양과학기술원 연안개발 에너지연구부) ;
  • 권오순 (한국해양과학기술원 연안개발 에너지연구부) ;
  • 유무성 (한국전력공사 전력연구원 사업화기술개발실)
  • Received : 2014.04.11
  • Accepted : 2014.08.29
  • Published : 2014.10.01
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Abstract

This paper is aimed to suggest a site specific partial safety factor of offshore wind turbine (OWT) pile foundation design for the offshore wind turbine complex at a West-South mainland sea in Korea. International offshore wind design standards such as IEC, GL, DNV, API, ISO and EUROCODE were compared with each partial safety factor and resistance factor. Soil uncertainty analysis using a large number of soil data sampled was carried out, and their results were adapted to estimate partial safety factor of OWT pile foundation through reliability analyses. The representative partial safety factor has been estimated as 1.3. When a proposed partial factor is willing to use to other sites, it is recommended that further studies on code calibration are required to validate their accuracy using more site characterization data.

본 논문은 국내 서남해안 해상풍력발전 하부기초설계 시 신뢰성 기반의 한계상태설계법 적용을 위한 말뚝기초의 부분안전계수를 제안하고자 한다. 우선, 해상풍력관련 국제 설계기준서인 IEC, GL, DNV, API, ISO, EUROCODE 등에서 제시한 다양한 부분안전계수 및 저항계수를 비교 분석하였다. 그리고 부안-영광 및 새만금 해역의 서남해안 해상풍력단지의 지반조사 결과를 가지고 불확실성 분석을 수행하였다. 불확실성 분석 결과를 토대로 신뢰성해석을 수행하여 지반정수에 대한 부분안전계수를 산정하였으며, 서남해안 지역의 해상풍력 말뚝기초의 부분안전계수는 1.3으로 평가되었다. 본 논문에서 제안된 부분안전계수는 서남해안에서의 지반조사 결과를 근거로 산정된 것이므로 기타 광역단위 해역에 활용하기 위해서는 추가적인 조사 및 지반정수에 대한 불확실성 분석을 통해 보정이 필요하다고 판단된다.

Keywords

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