DOI QR코드

DOI QR Code

A Study on Safe Vessel Traffic Speeds Based On a Ship Collision Energy Analysis at Incheon Bridge

인천대교 선박 충돌에너지 분석을 통한 선박의 통항안전 속력에 관한 연구

  • Received : 2016.02.01
  • Accepted : 2016.10.27
  • Published : 2016.10.31

Abstract

Incheon Bridge is 13.38 km long with an 800 m span, connecting Incheon International Airport and Songdo International City, Per hour 73.8 vessels navigate this space. The purpose of this study was to suggest a safe passing speed based on the displacement of a vessel based on the safety criteria of Incheon Bridge's anti-collision fence, which was designed during its initial construction. As AASHTO LRFD suggested, vessel collision energy, vessel collision velocity, and the hydrodynamic mass coefficient were considered to derive a safe vessel traffic speed. Incheon Bridge's anti-collision fence was designed so that 100,000 DWT vessels can navigate at a speed of 10 knot. This research suggests a safe speed for vessel traffic through a comparative analysis of an experimental ship's (300,000 DWT) speed and cargo conditions, regulation speed has been calculated according to the collision energy under each set of conditions. Additionally, safe traffic vessel's safe speed was analyzed with reference to tidal levels. Results from the experimental ship showed that a vessel of maximum 150,000 DWT is able to pass Incheon Bridge at a maximum of 7 knots with an above average water level, and is able to pass the bridge with a maximum of 8 knots under ballast conditions.

인천대교는 인천국제공항과 송도국제도시를 연결하는 길이 13.38 km, 경간 800 m의 대형 교량으로 시간당 73.8(vessel/hour)척의 선박이 통항하고 있다. 본 연구에서는 인천대교 건설 시 설계되었던 인천대교 충돌방지공의 안전기준을 바탕으로 인천대교를 통항하는 선박의 중량에 따른 안전한 통항 속력을 제시하고자 한다. 연구방법은 AASHTO LRFD에서 제시한 선박 충돌에너지와, 선박 충돌 속도, 수리동적질량계수를 고려하여 통항 선박의 안전 속력을 제시하고자 한다. 인천대교의 충돌방지공은 10만DWT급 선박이 10노트로 통항 할 수 있도록 설계되었다. 본 연구에서는 대상선박(30만DWT급)의 선속조건 및 화물 상태의 비교 분석을 통하여 각각의 충돌에너지에 따른 제한 속력을 산정하는 방식으로 통항 선박의 안전 속력을 제시하였다. 또한 해당 수역의 조위에 따른 통항 선박의 안전 속력을 추가적으로 분석하였다. 대상선박(30만DWT급)을 통한 연구 결과 최대 15만DWT급 선박이 평균조위 이상의 수심에서 최대 7노트 속력으로 운항이 가능한 것으로 나타났으며, 경하상태(Ballast condition)에서는 최대 8노트의 속력으로 인천대교를 통항할 수 있는 것으로 분석되었다.

Keywords

References

  1. AASHTO LRFD(2012), American Association of State Highway and Transportation Officials Load-and-resistance factor design, pp. 138-156.
  2. Bae, Y. G. and S. L. Lee(2013), Ship Collision Risk, Assessment and Sensitivity Analysis for Sea-crossing Bridges, Jounal of the Korean Society of Civil Engineers, Vol. 33, No. 5, pp. 1753-1763. https://doi.org/10.12652/Ksce.2013.33.5.1753
  3. Choi, Y. W. and T. H. Yoo(2005), Design of Incheon Bridge, Korean Society of Civil Engineers, pp. 39-47.
  4. Ha, S. B., J. I. Kim, D. J. Sung and H. M. Shin(2011), Nonlinear Finite Element Analysis of Incheon Bridge considering time-dependent behavior of concrete pylon, Korea Concrete Institute, pp. 531-532.
  5. Incheon Bridge Corporation(2008), Incheon Anti collision fence Structural design(1/3), p. 252.
  6. Incheon Bridge Corporation(2009), Incheon Bridge project design report, pp. 58.
  7. Incheon Regional Office of Oceans and Fisheries(2015), Incheon Port.Gyeongin port vessel traffic regulation, annex 3, http://www.portincheon.go.kr/NoticeCenter/NoticeNews_02_view.asp?idx=2142&pageone=1&sItem=subject&sStr=통항규칙&dept_code=tot.
  8. Jung, H. J., T. H. Yang, H. K. Kim, D. J. Moon and K. N. Kim(2014), Analysis Monitoring Data on Dynamic Response of Incheon bridge for a Long Span Bridge in Service Using Vehicle Load test, Korean Society of Civil Engineers, Vol. 2014. 10, pp. 747-748.
  9. Lee, J. H., K. S. Kwak, J. S. Yoon, Y. K. Lee and J. H. Kim(2006), Bridge scour monitoring on main piers of Inchon Grand bridge, Korean Society of Civil Engineers, Vol. 2006. 10, pp. 4406-4409.
  10. Lee, M.. J., H. S. Kim, J. H. Park(2008), The Planning and Risk analysis of Ship collision Protections, Yooshin Technical bulletin, Vol. 14, pp. 44-53.
  11. Yoo, S. R., C. Y. Jeong, C. H. Kim, S. H. Park and J. Y. Jeong(2013), A Study on Evaluation of Marine Traffic Congestion based on Survey Research in Major Port, Journal of the Korea Society of Marine Environment & Safety, Vol. 19, pp. 483-490. https://doi.org/10.7837/kosomes.2013.19.5.483