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Structural Engineering and Mechanics
  Volume 64, Number 3, November10 2017, pages 293-299

Theoretical evaluation of collision safety for Submerged Floating Railway Tunnel (SFRT) by using simplified analysis
Sung-il Seo, Jiho Moon and Hyung-Suk Mun

    Submarine collisions is one of the major hazardous factor for Submerged Floating Railway Tunnel (SFRT) and this study presents the safety evaluation for submarine collision to SFRT by using theoretical approach. Simplified method to evaluate the collision safety of SFRT was proposed based on the beam on elastic foundation theory. Firstly, the time history load function for submarine collision was obtained by using one-degree-of-freedom vibration model. Then, the equivalent mass and stiffness of the structure were calculated, and the collision responses of SFRT were evaluated. Finite element analysis was conducted to verify the proposed equations, and it can be found that the collision responses, such as deflection, and acceleration, agreed well with the proposed equations. Finally, derailment condition for high speed train in SFRT due to submarine collision was proposed.
Key Words
    Submerged Floating Railway Tunnel (SFRT); submarine collision; collision analysis
Sung-il Seo and Hyung-Suk Mun : New Transportation Research Center, Korea Railroad Research Institute(KRRI), Uiwang-Si, Gyeonggi-do, 437-757, South Korea
Jiho Moon : Department of Civil Engineering, Kangwon National University, Chuncheon-si, Gangwon-do 24341, South Korea

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