Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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A Study on the Effect of Soil Properties on Structural Behavior of Fixed Jacket Type Offshore Structure

고정식 자켓형 해양구조물의 지반 물성치에 따른 구조 응답에 관한 연구

  • Han, Sangwoong (Research Institute of Marine Systems Engineering, Seoul National University) ;
  • Lee, Kangsu (Korea Research Institute of Ships & Ocean Engineering) ;
  • Jang, Beom-Seon (Dept Naval Architecture & Ocean Engineering Research Institute of Marine Systems Engineering, Seoul National University) ;
  • Choi, Junhwan (Dept Naval Architecture & Ocean Engineering, Seoul National University)
  • 한상웅 (서울대학교 해양시스템 공학연구소) ;
  • 이강수 (한국해양과학기술원 부설 선박해양플랜트 연구소) ;
  • 장범선 (서울대학교 조선해양공학과 및 해양시스템 공학연구소) ;
  • 최준환 (서울대학교 조선해양공학과)
  • Received : 2018.06.18
  • Accepted : 2018.08.07
  • Published : 2018.10.20
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Abstract

For a fixed jacket type offshore structure directly supported by the seabed, the structural behavior of offshore structure depends on the soil properties. Soil properties affect on the stiffness of the piles and the boundary condition in the structural analysis. The structural analysis is performed using PSI (Pile-Soil Interaction) suggested in the code and design rule. PSI analysis of the jacket structure is carried out after various soil types are selected according to the soil properties like internal friction angle, undrained shear strength, unit weight and so on. Three types of soil are selected by varying strength for a clay and sand, respectively. The structural analysis of the jacket structure is performed using these soils. The results about axial and lateral reaction force and the stress and displacement on the structure are compared. As a results, the structural response is smaller as the soil becomes more stiff. In conclusion, it is confirmed that the structural response of fixed jacket type offshore platform supported by seabed is sensitive to the change of soil properties.

Keywords

References

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