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

The Society of Naval Architects of Korea (대한조선학회)
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A Procedure for a Strength Assessment of Permanent Means of Access Structure

Permanent Means of Access 강도 평가 방법에 대한 연구

  • Jang, Beom-Seon (Samsung Heavy Industries Co., Ltd., Offshore Basic Engineering Team, Seoul Offshore Design Center) ;
  • Chung, Sung-Wook (Samsung Heavy Industries Co., Ltd., Marine Research Institute, Structure Research) ;
  • Ko, Dae-En (Dong-Eui University, Department of Naval Architecture and Ocean Engineering) ;
  • Chun, Min-Sung (Samsung Heavy Industries Co., Ltd., Marine Research Institute, Structure Research) ;
  • Kim, Ji-Young (Samsung Heavy Industries Co., Ltd., Marine Research Institute, Structure Research)
  • 장범선 (삼성중공업 기본설계팀 서울해양설계) ;
  • 정성욱 (삼성중공업 조선해양연구소 구조연구) ;
  • 고대은 (동의대학교 조선해양공학과) ;
  • 전민성 (삼성중공업 조선해양연구소 구조연구) ;
  • 김지영 (삼성중공업 조선해양연구소 구조연구)
  • Published : 2009.02.20
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Abstract

Common structural rule (CSR) doesn' t provide any other specific regulations for permanent means of access (PMA) platform structure in a cargo oil tank. The PMA platform is recommended to comply with scantling requirement of local support member. However, it leads to too conservative scantlings compared with actual loads imposed on the platform. This paper proposes a strength assessment procedure for the PMA structure based on a nonlinear ultimate strength. The ultimate strength is evaluated in a sufficiently conservative way. The first linear buckling mode is used as an initial imperfection shape and its magnitude is determined using the definitions of DNV PULS. Since the same imperfection mode as the failure mode of the ultimate limit state is assumed, it can accelerate the failure. Au ultimate strength capacity curve obtained from a series of nonlinear FE analysis is compared with actual stresses calculated by CSR cargo hold analysis.

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References

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