Ocean Systems Engineering

  • 제10권4호
  • /
  • Pages.399-414
  • /
  • 2020
  • /
  • 2093-6702(pISSN)
  • /
  • 2093-677X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Time-domain coupled analysis of curved floating bridge under wind and wave excitations

  • Jin, Chungkuk (Department of Ocean Engineering, Texas A&M University) ;
  • Kim, MooHyun (Department of Ocean Engineering, Texas A&M University) ;
  • Chung, Woo Chul (Department of Ocean Engineering, Texas A&M University) ;
  • Kwon, Do-Soo (Department of Ocean Engineering, Texas A&M University)
  • 투고 : 2020.09.11
  • 심사 : 2020.12.02
  • 발행 : 2020.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

A floating bridge is an innovative solution for deep-water and long-distance crossing. This paper presents a curved floating bridge's dynamic behaviors under the wind, wave, and current loads. Since the present curved bridge need not have mooring lines, its deep-water application can be more straightforward than conventional straight floating bridges with mooring lines. We solve the coupled interaction among the bridge girders, pontoons, and columns in the time-domain and to consider various load combinations to evaluate each force's contribution to overall dynamic responses. Discrete pontoons are uniformly spaced, and the pontoon's hydrodynamic coefficients and excitation forces are computed in the frequency domain by using the potential-theory-based 3D diffraction/radiation program. In the successive time-domain simulation, the Cummins equation is used for solving the pontoon's dynamics, and the bridge girders and columns are modeled by the beam theory and finite element formulation. Then, all the components are fully coupled to solve the fully-coupled equation of motion. Subsequently, the wet natural frequencies for various bending modes are identified. Then, the time histories and spectra of the girder's dynamic responses are presented and systematically analyzed. The second-order difference-frequency wave force and slowly-varying wind force may significantly affect the girder's lateral responses through resonance if the bridge's lateral bending stiffness is not sufficient. On the other hand, the first-order wave-frequency forces play a crucial role in the vertical responses.

키워드

과제정보

This work was supported by Hyundai Engineering & Construction. This work was also supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2017R1A5A1014883).

참고문헌

  1. Cheng, Z., Gao, Z. and Moan, T. (2018), "Hydrodynamic load modeling and analysis of a floating bridge in homogeneous wave conditions", Mar. Struct., 59, 122-141. https://doi.org/10.1016/j.marstruc.2018.01.007
  2. Chung, J. and Hulbert, G. (1993), "A time integration algorithm for structural dynamics with improved numerical dissipation: the generalized-α method", J. Appl. Mech., 60(2), 371-375. https://doi.org/10.1115/1.2900803
  3. Fu, S. and Cui, W. (2012), "Dynamic responses of a ribbon floating bridge under moving loads", Mar. Struct., 29(1), 246-256. https://doi.org/10.1016/j.marstruc.2012.06.004
  4. Giske, F.I.G., Leira, B.J. and Oiseth, O. (2017), "Long-term stochastic extreme response analysis of floating bridges", Procedia Eng., 199, 1175-1180. https://doi.org/10.1016/j.proeng.2017.09.305
  5. Jin, C., Bakti, F.P. and Kim, M.H. (2021), "Time-domain coupled dynamic simulation for SFT-mooring-train interaction in waves and earthquakes", Mar. Struct., 75, 102883. https://doi.org/10.1016/j.marstruc.2020.102883
  6. Jin, C. and Kim, M.H. (2018), "Time-domain hydro-elastic analysis of a SFT (submerged floating tunnel) with mooring lines under extreme wave and seismic excitations", Appl. Sci., 8(12), 2386. https://doi.org/10.3390/app8122386
  7. Jin, C. and Kim, M.H. (2020), "Tunnel-mooring-train coupled dynamic analysis for submerged floating tunnel under wave excitations", Appl. Ocean Res., 94, 102008. https://doi.org/10.1016/j.apor.2019.102008
  8. Jin, C., Kim, M.H. and Chung, W.C. (2020), "Dynamic Behaviors of a Floating Bridge with Mooring Lines under Wind and Wave Excitations", Int. J. Mech. Mechatron. Eng., 14(7), 240-245.
  9. Kim, M.H. and Yue, D.K. (1991), "Sum-and difference-frequency wave loads on a body in unidirectional Gaussian seas", J. Ship Res., 35(2), 127-140. https://doi.org/10.5957/jsr.1991.35.2.127
  10. Larsen, P. (2016a), Curved bridge-navigation channel in south, Tech. rep., COWI and AAS-JAKOBSEN and GLOBAL MARITIME and Johs Holt as.
  11. Larsen, P. (2016b), Straight bridge - navigation channel in south, Tech. rep., COWI and AAS-JAKOBSEN and GLOBAL MARITIME and Johs Holt as.
  12. Lee, C.H. (1995), WAMIT theory manual. Massachusetts Institute of Technology, Department of Ocean Engineering.
  13. Orcina, L. (2018), OrcaFlex User Manual: OrcaFlex Version 10.2 c. Orcina.
  14. Petersen, O.W. and Oiseth, O. (2017), "Sensitivity-based finite element model updating of a pontoon bridge", Eng. Struct., 150, 573-584. https://doi.org/10.1016/j.engstruct.2017.07.025
  15. Viuff, T., Leira, B.J., Oiseth, O. and Xiang, X. (2016), "Dynamic Response of a Floating Bridge Structure, 19th Congress of IABSE, Challenges in Design and Construction of an Innovative and Sustainable Built Environment", The International Association for Bridge and Structural Engineering (IABSE).
  16. Wu, J.S. and Shih, P.Y. (1998), "Moving-load-induced vibrations of a moored floating bridge", Comput. Struct., 66(4), 435-461. https://doi.org/10.1016/S0045-7949(97)00072-2
  17. Xu, Y., Oiseth, O. and Moan, T. (2017), "Time domain modelling of frequency dependent wind and wave forces on a three-span suspension bridge with two floating pylons using state space models", ASME 2017 36th international conference on ocean, offshore and arctic engineering. American Society of Mechanical Engineers Digital Collection.