Journal of Navigation and Port Research (한국항해항만학회지)

Korean Institute of Navigation and Port Research (한국항해항만학회)
권호 표지
DOI QR코드

DOI QR Code

Effect of Incident Angle of Wave on Floating Pontoon and Moment Resisting Frame

파랑 입사각이 장방형 플로팅 함체와 상부 골조에 미치는 효과

  • Lee, Young-Wook (Department of Architecture and Building Engineering, Kunsan National University) ;
  • Kim, Bo-Ram (Department of Architecture and Building Engineering, Kunsan National University)
  • Received : 2013.03.05
  • Accepted : 2013.04.25
  • Published : 2013.04.30
Download PDF
⟨ Previous Next ⟩

Abstract

To find the influence of incident angle of wave on the moment of 3 storied steel moment resisting frame which is placed on the concrete rectangular pontoon, the fluid dynamic analysis is carried out, varying the period of wave from 5 to 15 second by 2 seconds. As increasing incident angle of wave to longitudinal axis, the influence of RAO-rolling is increased. The moment of longitudinal frame is increased apparently by the wave pressure when the incident angle is $0^{\circ}$. And the moment of the frame due to the wave pressure is decreased as the incident angle is increased. But the moment of frame due to acceleration caused from pitching and rolling is increased. It is shown that the increased moment when incident angle is $90^{\circ}$ is much greater than that of incident angle $0^{\circ}$.

파랑하중의 입사각의 변화가 직사각형 콘크리트 플로팅 함체 위에 있는 3층 철골 모멘트 연성골조의 모멘트에 미치는 영향을 알아보기 위하여, 파도 주기 5초부터 15초까지 2초 간격으로 동적 유체해석을 수행하였다. 길이방향에 대하여 입사각이 $0^{\circ}$, $30^{\circ}$, $60^{\circ}$, $90^{\circ}$로 증가함에 따라 RAO-Roll에 의한 영향이 증가하는 것으로 나타났다. 파압에 의하여 입사각이 $0^{\circ}$인 경우 길이방향의 골조 모멘트가 크게 증가하였으며, 입사각이 증가함에 따라 파압에 의한 모멘트가 감소하는 것으로 나타났다. 또한 함체의 피칭과 롤링에 의하여 발생되는 가속도 성분에 의하여 상부 철골 모멘트 연성 골조의 모멘트를 산정하였으며, 입사각이 $90^{\circ}$로 작용한 경우에 모멘트의 증가량이 입사각 $0^{\circ}$의 경우보다 크게 나타났다.

Keywords

References

  1. Lee, H. S., Moon, C. H. and Kang, Y. H.(2009), "An Analysis of Market Situation and Industry Trend in Floating Architecture ", Journal of Proceedings of the Korean Institute of Navigation and Port Research Conference, 2009, pp. 141-144.
  2. Lee, Y. W., Park, J. A., Chae, J. Y. and Choi, J. H.(2012), "Response Characteristics of the Steel Moment Resisting Frame According to the Stiffness Variation of Pontoon", Journal of Navigation and Port Research, Vol. 36, No. 3, pp. 215-224. https://doi.org/10.5394/KINPR.2012.36.3.215
  3. Lee, Y. W. and Chae, J. Y.(2012), "Analysis method of the Superstructure on Floating Pontoon Considering the Construction Sequences ", Journal of Navigation and Port Research, Vol. 36, No. 3, pp. 225-232. https://doi.org/10.5394/KINPR.2012.36.3.225
  4. Ministry Of Maritime Affairs & Fisheries(2008), Resaerch of Development of Design Technology of Very Large Floating Structures, pp. 21-24.
  5. Suzuki, H. and Yoshida, K.(1996), "Design flow and strategy for safety of very large floating structure", VLFS '96, pp. 21-27.
  6. Zi, G. S., Kim, J. G., Lee, S. O. and Lee, P. S.(2010), "Development of a Design Chart for the Initial Design Stage of Very Large Floating Structures," Journal of the Korean Society of Civil Engineers, Vol. 30, No.3B, pp. 315-324.