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Experimental Study for Concrete Base to Sleeve connection of Hybrid Substructure for Offshore Wind Turbine

하이브리드 해상풍력발전 지지구조물의 콘크리트 베이스-슬리브 연결부에 대한 실험 연구

  • Lee, Jeong-Hwa (School of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Byun, Nam-Joo (School of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Kim, Seong-Hwan (DONG MYEONG engineering consultants & architecture co.,LTD.) ;
  • Park, Jae-Hyun (Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology) ;
  • Kang, Young-Jong (School of Civil, Environmental and Architectural Engineering, Korea University)
  • 이정화 (고려대학교 건축사회환경공학부) ;
  • 변남주 (고려대학교 건축사회환경공학부) ;
  • 김성환 (동명기술공단종합건축사사무소 부설연구소) ;
  • 박재현 (한국건설기술연구원 지반연구소) ;
  • 강영종 (고려대학교 건축사회환경공학부)
  • Received : 2015.11.30
  • Accepted : 2016.01.05
  • Published : 2016.01.31

Abstract

In this paper, concrete base to sleeve connections of hybrid substructures for offshore wind turbines were suggested and investigated experimentally. Punching shear strength tests with well-instrumented three connections under different reinforcement ratios and loading conditions were conducted to investigate the punching shear strength and the behavior of the concrete base to a sleeve connection. The test results showed that the punching strength and stiffness of the connections are affected mainly by the reinforcement ratios. The loading conditions with an axial load and proportional moment cannot affect the stiffness but affect the strength of the connections because of the axial load-moment interaction. The punching shear failure and critical section of the each test specimen are also discussed.

본 논문에서는 하이브리드 해상풍력발전 지지구조물의 콘크리트베이스와 파일기초를 연결하는 베이스-슬리브 연결부를 제시하고 이를 실험적으로 검증하였다. 베이스-슬리브 연결부의 펀칭 전단 강도와 구조거동을 분석을 위하여, 철근비와 하중조건을 변수로 하는 3개의 연결부 실험체에 대하여 펀칭전단실험이 실시하였다. 실험 결과, 베이스-슬리브 연결부의 펀칭전단강도와 강성은 베이스의 철근비에 주로 영향을 받는 것으로 나타났다. 축력과 모멘트가 동시에 작용되는 하중 조건은 연결부의 강성에는 영향을 미치지 않으나 축력-모멘트 상호작용에 의하여 강도에 영향을 미치는 것으로 나타났다. 또한, 각 실험체의 파괴거동과 펀칭전단의 위험단면에 대해 검토되었다.

Keywords

References

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