DOI QR코드

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Seismic and vibration mitigation for the A-type offshore template platform system

  • Lee, Hsien Hua (Department of Marine Environment, National Sun Yat-sen University)
  • 발행 : 1998.04.25

초록

In this study an improved design method for the traditional A-type(or V-type) offshore template platform system was proposed to mitigate the vibration induced by the marine environmental loadings and the strong ground motions of earthquakes. A newly developed material model was combined into the structural system and then a nonlinear dynamic analysis in the time domain was carried out. The analysis was focused on the displacement and rotation induced by the input wave forces and ground motions, and the mitigation effect for these responses was evaluated when the viscoelastic damping devices were applied. The wave forces exerted on the offshore structures are based on Stokes fifth-order wave theory and Morison equation for small body. A step by step integration method was modified and used in the nonlinear analysis. It was found that the new design approach enhanced with viscoelastic dampers was efficient on the vibration mitigation for the structural system subjected to both the wave motion and the strong ground motion.

키워드

참고문헌

  1. Bagley, R.H. and Torvik, P.J. (1979), "A generalized derivative model for an elastomer damper", Shock Vibration Bull., 49, 135-143.
  2. Bathe, K.J. and Wilson, E.L. (1976), Numerical Methods in Finite Element Analysis, Prentice-Hall, Englewood Cliffs, NJ.
  3. Bergman, D.M. and Hanson, R.D. (1986), "Characteristics of viscoelastic damping devices", Proc. ATC Seminar and Workshop on Base Isolation and Passive Energy Dissipation, Applied Technology Council, Redwood City, CA.
  4. Isaacson, M. (1979), "Nonlinear inertia forces on bodies", J. Waterways etc., Div. ASCE, WW3, 213-227.
  5. Chang, K.C., Soong, T.T., Oh, S.T. and Lai, M.L. (1991), "Seismic response of a 2/5 scale steel structure with added viscoelastic dampers", Technical Report NCEER-91-0012, State University at Buffalo, Buffalo, NY.
  6. Lee, H.H. and Tsai, C.S. (1992), "Analytical model for viscoelastic dampers in seismic mitigation application", 10th World Conf. on Earthquake Engrg., Madrid Spain., 2461-2466.
  7. Lee, H.H. and Tsai, C.S. (1994), "Analytical model of viscoelastic dampers for seismic mitigation of structures", Computers and Structures-An Int. J., 50(1), 111-121. https://doi.org/10.1016/0045-7949(94)90442-1
  8. Lee, H.H. and Wu, R.-J. (1996), "Vibration mitigation of structures in the marine environment", Ocean Engineering-An Int. J., 23.
  9. Lin, R.C. Liang, Z. and Soong, T.T. (1988), "An experimental study of seismic structural response with added viscoelastic dampers", Technical Report NCEER-88-0018, State University at Buffalo, Buffalo, NY.
  10. Mahmoodi, P. (1972), "Structural dampers", J. Structural Div., ASCE, 95, 1661-1667.
  11. Mason, A.B., Beck, J.L., Chen, J. and Ullmann, R.R. (1989), "Modal parameter identification of an offshore platform from earthquake response records", Seismic Engineering: Research and Practice-Proceedings, Seismic Engineering at Structure Congress, Edited by Kircher, A. and Choppra, A.K. 217-226.
  12. Newman, J.N. (1977), Marine Hydrodynamics, MIT Press, Camn. Mass.
  13. Newmark, N.M. (1962), "A method of computation for structural dynamics", Trans. ASCE, 127(1), 1406-1435.
  14. Penzien, J. and Tseng, S. (1978), "Three-dimensional dynamic analysis of fixed offshore platforms", In Numerical Methods in Offshore Engineering, John Wiley and Sons, New York, 221-243.
  15. Skjelbreia, L. and Hendrickson, J.A. (1960), "Fifth order gravity wave theory", Proc. 7th Coastal Eng. Conf., The Hague, 184-196.
  16. Tsai, C.-S. and Lee, H.H. (1992a), "Application of viscoelastic dampers to jointed structures for seismic mitigation", ASCE Engineering Mechanics Conference, Texas A & M University.
  17. Tsai, C.-S. and Lee, H.H. (1992b), "Application of viscoclastic dampers to bridges for seismic mitigation", PVP Vol. 229, Doe Facilities Programs, System Interaction and Active/Interactive Damping ASME, 113-118.
  18. Tsai, C.-S. and Lee, H.H. (1993a), "Application of viscoelastic dampers to high-rise buildings", J. of Structural Engineering, ASCE, 119(4), 1222-1233. https://doi.org/10.1061/(ASCE)0733-9445(1993)119:4(1222)
  19. Tsai, C.-S. and Lee, H.H. (1993b), "Seismic mitigation of bridges by using viscoelastic dampers", Computers and Structures-An Int. J., 48(4), 719-727. https://doi.org/10.1016/0045-7949(93)90265-F
  20. PVP 229, Doe Facilities Programs, System Interaction and Active/Interactive Damping ASME, 113-118.
  21. Tsai, C.-S. and Lee, H.H. (1993a), "Application of viscoelastic dampers to high-rise buildings", J. of Structural Engineering ASCE, 119(4), 1222-1233. https://doi.org/10.1061/(ASCE)0733-9445(1993)119:4(1222)
  22. Tsai, C.-S. and Lee, H.H. (1993b), "Seisfiric mitigation of bridges by using viscoelastic dampers", Computers and Structures, An Int'l J., 48(4), 719-727. https://doi.org/10.1016/0045-7949(93)90265-F

피인용 문헌

  1. Experimental study on the vibration mitigation of offshore tension leg platform system with UWTLCD vol.9, pp.1, 1998, https://doi.org/10.12989/sss.2012.9.1.071