Seismic Response Control of Bridge Structure using Fuzzy-based Semi-active Magneto-rheological Dampers

  • Park, Kwan-Soon (Department of Architectural Engineering, Dongguk University) ;
  • Ok, Seung-Yong (Department of Safety Engineering, Hankyong National University) ;
  • Seo, Chung-Won (R&D Center, MIDAS Information Technology Co., Ltd.)
  • Received : 2011.03.04
  • Accepted : 2011.06.12
  • Published : 2011.06.30

Abstract

Seismic response control method of the bridge structures with semi-active control device, i.e., magneto-rheological (MR) damper, is studied in this paper. Design of various kinds of clipped optimal controller and fuzzy controller are suggested as a semi-active control algorithm. For determining the control force of MR damper, clipped optimal control method adopts bi-state approach, but the fuzzy control method continuously quantifies input currents through fuzzy inference mechanism to finely modulate the damper force. To investigate the performances of the suggested control techniques, numerical simulations of a multi-span continuous bridge system subjected to various earthquakes are performed, and their performances are compared with each other. From the comparison of results, it is shown that the fuzzy control system can provide well-balanced control force between girder and pier in the view point of structural safety and stability and be quite effective in reducing both girder and pier displacements over the existing control method.

Keywords

References

  1. M.J.N. Priestley, F. Seible and G.M. Calvi, Seismic design and retrofit of bridges, John Wiley & Sons, Inc., 1996.
  2. D.H. Ha and H.M. Koh, "Earthquake response characteristics of seismically isolated bridges with frictional bearings", Journal of Korean Society of Civil Engineers, KSCE, vol. 20, no. 6-A, p. 937-944, 2000.
  3. B. Erkus, M. Abe and Y. Fujino, "Investigation of semi-active control for seismic protection of elevated highway bridges", Engineering Structures, vol. 24, no. 3, p. 281-293, 2002. https://doi.org/10.1016/S0141-0296(01)00095-5
  4. B.F. Spencer Jr., S.J. Dyke, M.K. Sain and J.D. Carlson, "Phenomenological model of a magneto-rheological damper", Journal of Engineering Mechanics, ASCE, vol. 123, no. 3, p. 230-238, 1996.
  5. S.J. Dyke, B.F. Spencer Jr., M.K. Sain, and J.D. Carlson, "Modeling and control of magneto-rheological dampers for seismic response reduction", Smart Materials and Structures, vol. 5, p. 565-575, 1996.
  6. S.J. Dyke, B.F. Spencer Jr., M.K. Sain and J.D. Carlson, "An experimental study of MR dampers for seismic protection", Smart Materials and Structures: Special Issue on Large Civil Structures, vol. 7, p. 693- 703, 1998.
  7. B.F. Spencer Jr., G. Yang, J.D. Carlson and M.K. Sain, "Smart dampers for seismic protection of structures: a full-scale study", Proceedings of the Second World Conference on Structural Control (2WCSC), Kyoto, Japan, June 28 - July 1, vol. 1, p. 417-426, 1998.
  8. G. Yang, H.J. Jung and B.F. Spencer Jr., "Dynamic model of full-Scale MR dampers for civil engineering applications", US-Japan Workshop on Smart Structures for Improved Seismic Performance in Urban Region, Seattle, WA, Aug. 2001.
  9. G. Yang, B.F. Spencer Jr., J.D. Carlson and M.K. Sain, "Large-scale MR fluid dampers: modeling, and dynamic performance considerations", Engineering Structures, vol. 24, no. 3, p. 309-323, 2002. https://doi.org/10.1016/S0141-0296(01)00097-9
  10. M.D. Symans MD and M.C. Constantinou, "Semiactive control systems for seismic protection of structures: a state-of-the-art review", Engineering Structures, vol. 21, no. 6, p. 469-487, 1999. https://doi.org/10.1016/S0141-0296(97)00225-3
  11. L.M. Jansen and S.J. Dyke, "Semiactive control strategies for MR dampers: comparative study", Journal of Engineering Mechanics, vol. 126, no. 8, p. 795-803, 2000. https://doi.org/10.1061/(ASCE)0733-9399(2000)126:8(795)
  12. Y.L. Xu, W.L. Qu and J.M. Ko, "Seismic response control of frame structures using magnetorheological/ electrorheological dampers", Earthquake Engineering and Structural Dynamics, vol. 29, no. 5, p. 557-575, 2000. https://doi.org/10.1002/(SICI)1096-9845(200005)29:5<557::AID-EQE922>3.0.CO;2-X
  13. O. Yoshida and S.J. Dyke, "Seismic control of a nonlinear benchmark building using smart dampers", Journal of Engineering Mechanics, vol. 130, no. 4, p. 386- 392, 2004. https://doi.org/10.1061/(ASCE)0733-9399(2004)130:4(386)
  14. L.-X. Wang, A course in fuzzy systems and control, Prentice-Hall, Englewood Cliffs, NJ, 1996.
  15. M.D. Symans and S.W. Kelly, "Fuzzy logic control of bridge structures using intelligent semi-active seismic isolation systems", Earthquake Engineering and Structural Dynamics, vol. 28, p. 37-60, 1999. https://doi.org/10.1002/(SICI)1096-9845(199901)28:1<37::AID-EQE803>3.0.CO;2-Z
  16. K.-S. Park, H.-M. Koh, S.-Y. Ok and C. Seo, "Semiactive fuzzy control of bridge structure with MR damper", Journal of Korean Society of Civil Engineers, KSCE, vol. 22, no. 4-A, p. 847-857, 2002.
  17. S.-Y. Ok, D.-S. Kim, K.-S. Park and H.-M. Koh, "Semi-active fuzzy control of cable-stayed bridges using magneto-rheological dampers", Engineering Structures, vol. 29, p. 776-788, 2007. https://doi.org/10.1016/j.engstruct.2006.06.020
  18. J. Rabinow, "The magnetic fluid clutch", AIEE Transactions, vol. 67, no. 2, p. 1308-1315, 1948.
  19. D.E. Kirk, Optimal control theory-an introduction, Prentice Hall, 1970.
  20. AASHTO, Guide Specifications for Seismic Isolation Design, American Association of State Highway and Transportation Officials, Washington, D.C., 1999.
  21. M. Battaini, F. Casciati and L. Faravelli, "Fuzzy control of structural vibration. An active mass system driven by a fuzzy controller", Earthquake Engineering and Structural Dynamics, vol. 27, p. 1267-1276, 1998. https://doi.org/10.1002/(SICI)1096-9845(1998110)27:11<1267::AID-EQE782>3.0.CO;2-D
  22. J.C. Ramallo, E.A. Johnson and B.F. Spencer Jr., "Smart base isolation systems", Journal of Engineering Mechanics, ASCE, vol. 128, no. 10, p. 1088-1099, 2002. https://doi.org/10.1061/(ASCE)0733-9399(2002)128:10(1088)