Geomechanics and Engineering

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Numerical study on the resonance behavior of submerged floating tunnels with elastic joint

  • Park, Joohyun (Department of Civil and Environmental Engineering, Korea Advanced Institute for Science and Technology) ;
  • Kang, Seok-Jun (Department of Civil and Environmental Engineering, Korea Advanced Institute for Science and Technology) ;
  • Hwang, Hyun-Joong (Department of Civil and Environmental Engineering, Korea Advanced Institute for Science and Technology) ;
  • Cho, Gye-Chun (Department of Civil and Environmental Engineering, Korea Advanced Institute for Science and Technology)
  • Received : 2021.09.15
  • Accepted : 2022.03.15
  • Published : 2022.05.10
⟨ Previous Next ⟩

Abstract

In submerged floating tunnels (SFTs), a next-generation maritime transportation infrastructure, the tunnel module floats in water due to buoyancy. For the effective and economical use of SFTs, connection with the ground is inevitable, but the stability of the shore connection is weak due to stress concentration caused by the displacement difference between the subsea bored tunnel and the SFT. The use of an elastic joint has been proposed as a solution to solve the stability problem, but it changes the dynamic characteristics of the SFT, such as natural frequency and mode shape. In this study, the finite element method (FEM) was used to simulate the elastic joints in shore connections, assuming that the ground is a hard rock without displacement. In addition, a small-scale model test was performed for FEM model validation. A parametric study was conducted on the resonance behavior such as the natural frequency change and velocity, stress, and reaction force distribution change of the SFT system by varying the joint stiffness under loading conditions of various frequencies and directions. The results indicated that the natural frequency of the SFT system increased as the stiffness of the elastic joint increased, and the risk of resonance was the highest in the low-frequency environment. Moreover, stress concentration was observed in both the SFT and the shore connection when resonance occurred in the vertical mode. The results of this study are expected to be utilized in the process of quantitative research such as designing elastic joints to prevent resonance in the future.

Keywords

Acknowledgement

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2017R1A5A1014883). The first author is supported by the Innovated Talent Education Program for Smart City from MOLIT.

References

  1. Cabalar, A.F. (2016), "Cyclic behavior of various sands and structural materials interfaces", Geomech. Eng., 10(1), 1-19. https://doi.org/10.12989/gae.2016.10.1.001.
  2. Chong, S.H., Shin, H.S. and Cho, G. C. (2019), "Numerical analysis of offshore monopile during repetitive lateral loading", Geomech. Eng., 19(1), 79-91. https://doi.org/10.12989/gae.2019.19.1.079.
  3. Chopra, A.K. (2012), Dynamics of structures (4th ed.), Pearson, New York, NY, USA.
  4. Cifuentes, C., Kim, S., Kim, M.H., and Park, W.S. (2015), "Numerical simulation of the coupled dynamic response of a submerged floating tunnel with mooring lines in regular waves", Ocean Syst. Eng., 5(2), 109-123. https://doi.org/10.12989/ose.2015.5.2.109.
  5. Do, N.A., Dias, D. and Oreste, P. (2018), "Numerical investigation of segmental tunnel linings-comparison between the hyperstatic reaction method and a 3D numerical model", Geomech. Eng., 14(3), 293-299. https://doi.org/10.12989/gae.2018.14.3.293.
  6. Doebling, S.W., Farrar, C.R. and Prime, M.B. (1998), "A summary review of vibration-based damage identification methods", Shock Vib.Digest, 30(2), 91-105. https://doi.org/10.1177/058310249803000201
  7. Fritzen, C.P. (2005), "Vibration-based structural health monitoring-concepts and applications", Key Eng. Mater., 293, 3-20. https://doi.org/10.4028/www.scientific.net/KEM.293-294.3.
  8. Hong, Y. and Ge, F. (2010), "Dynamic response and structural integrity of submerged floating tunnel due to hydrodynamic load and accidental load", Proc. Eng., 4, 35-50. https://doi.org/10.1016/j.proeng.2010.08.006.
  9. Jakobsen, B. (2010), "Design of the Submerged Floating Tunnel operating under various conditions", Proc. Eng., 4, 71-79. https://doi.org/10.1016/j.proeng.2010.08.009.
  10. Jin, C. and Kim, M. (2017), "Dynamic and structural responses of a submerged floating tunnel under extreme wave conditions", Ocean Syst. Eng., 7(4), 413-433. https://doi.org/10.12989/ose.2017.7.4.413.
  11. 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.
  12. Kang, S.J., Kim, J.T. and Cho, G.C. (2020), "Preliminary study on the ground behavior at shore connection of submerged floating tunnel using numerical analysis", Geomech. Eng., 21(2), 133-142. https://doi.org/10.12989/gae.2020.21.2.133.
  13. Kang, S.J., Park, J. and Cho, G.C. (2021), "Numerical Study on Dynamic Response of Submerged Floating Tunnel Depending on Shore Connection", Proceedings of the 2021 World Congress on Advances in Structural Engineering and Mechanics (ASEM21), Seoul, Korea, August. https://doi.org/10.12989/gae.2020.21.2.133.
  14. Kim, S., Kim, M.H. and Park, W.S. (2015), "Numerical simulation of the coupled dynamic response of a submerged floating tunnel with mooring lines in regular waves", Ocean Syst. Eng., 5(2), 109-123. https://doi.org/10.12989/ose.2015.5.2.109.
  15. Kuhlemeyer, R.L. and Lysmer, J. (1973), "Finite element method accuracy for wave propagation problems", J. Soil Mech. Found., 99(5), 421-427. https://doi.org/10.1061/JSFEAQ.0001885.
  16. Kunisu, H., Mizuno, S., Mizuno, Y. and Saeki, H. (1994), "Study on submerged floating tunnel characteristics under the wave condition", Proceedings of the 4th International Offshore and Polar Engineering Conference, Osaka, Japan, April.
  17. Kwak, C., Jang, D., You, K. and Park, I. (2018), "Dynamic response on tunnel with flexible segment:", Geomech. Eng., 15(3), 833-839. https://doi.org/10.12989/gae.2018.15.3.833.
  18. Lee, J.Y., Jin, C. and Kim, M. (2017), "Dynamic response analysis of submerged floating tunnels by wave and seismic excitations", Ocean Syst. Eng., 7(1), 1-19. https://doi.org/10.12989/ose.2017.7.1.001.
  19. Lindholm, U.S., Kana, D.D., Chu, W.H. and Abramson, H.N. (1965), "Elastic vibration characteristics of cantilever plates in water", J. Ship Prod. Des., 9(02), 11-36. https://doi.org/10.5957/jsr.1965.9.2.11.
  20. Mazzolani, F.M., Faggiano, B. and Martire, G. (2010), "Design aspects of the AB prototype in the Qiandao Lake", Proc. Eng., 4, 21-33. https://doi.org/10.1016/j.proeng.2010.08.005.
  21. Morita, S., Yamashita, T., Mizuno, Y., Mineta, M. and Kurosaki, K. (1994), "Earthquake Response Analysis of Submerged Floating Tunnels Considering Water Compressibility", Proceedings of the 4th International Offshore and Polar Engineering Conference, Osaka, Japan, April.
  22. Murugan, R., Ramesh, R. and Padmanabhan, K. (2016), "Investigation of the mechanical behavior and vibration characteristics of thin walled glass/carbon hybrid composite beams under a fixed-free boundary condition", Mech. Adv. Mater. Struct., 23(8), 909-916. https://doi.org/10.1080/15376494.2015.1056394.
  23. Nilsen, B., & Palmstrϕm, A. (2017), "Stability and water leakage of hard rock subsea tunnels", Modern Tunn. Sci. Technol., 497-502).
  24. Oh, S.H., Park, W.S., Jang, S.C. and Kim, D.H. (2013), "Investigation on the behavioral and hydrodynamic characteristics of submerged floating tunnel based on regular wave experiments", J. Kor. Soc. Civ. Eng., 33(5), 1887-1895. https://doi.org/10.12652/Ksce.2013.33.5.1887.
  25. Seo, S.I., Mun, H.S., Lee, J.H. and Kim, J.H. (2015), "Simplified analysis for estimation of the behavior of a submerged floating tunnel in waves and experimental verification", Mar. Struct., 44, 142-158. https://doi.org/10.1016/j.marstruc.2015.09.002.
  26. Shi, P., Zhang, D., Pan, J. and Liu, W. (2016), "Geological investigation and tunnel excavation aspects of the weakness zones of Xiang'an subsea tunnels in China", Rock Mech. Rock Eng., 49(12), 4853-4867. https://doi.org/10.1007/s00603-016-1076-z.
  27. Tariverdilo, S., Mirzapour, J., Shahmardani, M., Shabani, R. and Gheyretmand, C. (2011). "Vibration of submerged floating tunnels due to moving loads", Appl. Math. Model., 35(11), 5413-5425. https://doi.org/10.1016/j.apm.2011.04.038.
  28. Tickoo, S. (2016), SolidWorks 2016 for Designers, CADCIM Technologies, Schererville, IN, USA.
  29. Yan, H., Luo, Y. and Yu, J. (2016), "Dynamic response of submerged floating tunnel in the flow field", Proc. Eng., 166, 107-117. https://doi.org/10.1016/j.proeng.2016.11.573.
  30. Yarramsetty, P.C.R., Domala, V., Poluraju, P. and Sharma, R. (2019), "A study on response analysis of submerged floating tunnel with linear and nonlinear cables", Ocean Syst. Eng., 9(3), 219-240. https:// doi.org/10.12989/ose.2019.9.3.219.
  31. Youshi, H. and Fei, G. (2010), "Dynamic response and structural integrity of submerged floating", Proc. Eng., 4, 35-50. https://doi.org/10.1016/j.proeng.2010.08.006.