Semi-active storey isolation system employing MRE isolator with parameter identification based on NSGA-II with DCD

  • Gu, Xiaoyu (Centre for Built Infrastructure Research, Faculty of Engineering and IT, University of Technology) ;
  • Yu, Yang (Centre for Built Infrastructure Research, Faculty of Engineering and IT, University of Technology) ;
  • Li, Jianchun (Centre for Built Infrastructure Research, Faculty of Engineering and IT, University of Technology) ;
  • Li, Yancheng (Centre for Built Infrastructure Research, Faculty of Engineering and IT, University of Technology) ;
  • Alamdari, Mehrisadat Makki (Centre for Built Infrastructure Research, Faculty of Engineering and IT, University of Technology)
  • Received : 2016.03.10
  • Accepted : 2016.07.17
  • Published : 2016.12.25


Base isolation, one of the popular seismic protection approaches proven to be effective in practical applications, has been widely applied worldwide during the past few decades. As the techniques mature, it has been recognised that, the biggest issue faced in base isolation technique is the challenge of great base displacement demand, which leads to the potential of overturning of the structure, instability and permanent damage of the isolators. Meanwhile, drain, ventilation and regular maintenance at the base isolation level are quite difficult and rather time- and fund- consuming, especially in the highly populated areas. To address these challenges, a number of efforts have been dedicated to propose new isolation systems, including segmental building, additional storey isolation (ASI) and mid-storey isolation system, etc. However, such techniques have their own flaws, among which whipping effect is the most obvious one. Moreover, due to their inherent passive nature, all these techniques, including traditional base isolation system, show incapability to cope with the unpredictable and diverse nature of earthquakes. The solution for the aforementioned challenge is to develop an innovative vibration isolation system to realise variable structural stiffness to maximise the adaptability and controllability of the system. Recently, advances on the development of an adaptive magneto-rheological elastomer (MRE) vibration isolator has enlightened the development of adaptive base isolation systems due to its ability to alter stiffness by changing applied electrical current. In this study, an innovative semi-active storey isolation system inserting such novel MRE isolators between each floor is proposed. The stiffness of each level in the proposed isolation system can thus be changed according to characteristics of the MRE isolators. Non-dominated sorting genetic algorithm type II (NSGA-II) with dynamic crowding distance (DCD) is utilised for the optimisation of the parameters at isolation level in the system. Extensive comparative simulation studies have been conducted using 5-storey benchmark model to evaluate the performance of the proposed isolation system under different earthquake excitations. Simulation results compare the seismic responses of bare building, building with passive controlled MRE base isolation system, building with passive-controlled MRE storey isolation system and building with optimised storey isolation system.


Supported by : Australian Research Council


  1. Chey, M.H., Chase, J.G., Mander, J.B. and Carr, A.J. (2009), "Semi-active control of mid-story isolation building system", Proceeding of Asia Korean Conference on Advanced Science & Technology.
  2. Chey, M.H., Chase, J.G., Mander, J.B. and Carr, A.J. (2013), "Innovative seismic retrofitting strategy of added stories isolation system", Front. Struct. Civ. Eng., 7(1), 13-23.
  3. Forcellini, Davide and James Marshall Kelly (2013), "Analysis of the large deformation stability of elastomeric bearings", J. Eng. Mech., ASCE, 140(6), 04014036.
  4. Gilmore, A.T. (2012), "Options for sustainable earthquake-resistant design of concrete and steel buildings", Earthq. Struct., 3(6), 783-804.
  5. Gu, X., Li, J. and Li, Y. (2014), "Innovative semi-active storey isolation system utilising novel magnetorheological elastomer base isolators", Proceeding of 23rd Australasian Conference on the Mechanics of Structures and Materials (ACMSM23), Byron Bay, Australia, 9-12 December.
  6. Jangid, R.S. and Datta, T.K. (1995), "Seismic behaviour of base-isolated buildings: A state-of-the art review", P. I. Civ. Eng.-Struct. Build., 110(2), 186-203.
  7. Jangid, R.S. and Kelly, J.M. (2001), "Base isolation for near-fault motions", Earthq. Eng. Struct. Dyn., 30(5), 691-707.
  8. Jin, J.M., Tan, P., Zhou, F.L., Ma, Y.H. and Shen, C.Y. (2012), "Shaking table test study on mid-story isolation structures", Adv. Mater. Res., 446, 378-381.
  9. Johnson, E.A., Ramallo, J.C., Spencer Jr, B.F. and Sain, M.K. (1998), "Intelligent base isolation systems", Proceedings of the Second World Conference on Structural Control, USA, June.
  10. Kawamura, S., Sugisaki, R., Ogura, K., Maezawa, S., Tanaka, S. and Yajima, A. (2000), "Seismic isolation retrofit in Japan", 12th World Conference on Earthquake Engineering.
  11. Kelly, J.M. (1981), "A seismic base isolation: its history and prospects", Joint sealing and bearing system for concrete structures: world congress on joints and bearings, IRN11891798, Published by American Concret Institute, 549-586.
  12. Kelly, J.M. (1986), "Aseismic base isolation: review and bibliography", Soil Dyn. Earthq. Eng., 5(4), 202-216.
  13. Kelly, J.M. (1993), "State-of-the-art and state-of-the-practice in base isolation", Seminar on Seismic Isolation, Passive Energy Dissipation and Active Control (ATC-17-1), Applied Technology Council, Redwood City.
  14. Li, Y., Li, J. and Li, W. (2013a), "Design and experimental testing of an adaptive magneto-rheological elastomer base isolator", 2013 IEEE/ASME International Conference on Advanced Intelligent Mechatronics, Wollongong, Australia, July.
  15. Li, Y., Li, J. and Samali, B. (2012), "A novel adaptive base isolator utilising magnetorheological elastomer", 22nd Australasian Conference on the Mechanics of Structures and Materials, Sydney, Australia, December.
  16. Li, Y., Li, J., Tian, T. and Li, W. (2013b), "A highly adjustable magneto-rheological elastomer base isolator for applications of real-time adaptive control", Smart Mater. Struct., 22(9), 095020.
  17. Murakami, K., Kitamura, H., Ozaki, H. and Teramoto, T. (2000), "Design and analysis of a building with the middle-story isolation structural stystem", 12th World Conference of Earthquake Engineering, 857.
  18. Pan, T.C., Ling, S.F. and Cui, W. (1993), "A new concept for reducing vibration of buildings under seismic loading", Proceedings of Asia-Pacific Vibration Conference, Kitakyshu, Japan.
  19. Pan, Tso‐Chien, Shih‐Fu Ling and Wei Cui (1995), "Seismic response of segmental buildings", Earthq. Eng. Struct. Dyn., 24(7), 1039-1048.
  20. Pan, Tso-Chien and Wei Cui (1998), "Response of segmental buildings to random seismic motions", ISET J. Eng. Technol., 35(4), 105-112.
  21. Ryan, Keri L. and Curtis L. Earl (2010), "Analysis and design of inter-story isolation systems with nonlinear devices", J. Earthq. Eng., 14(7), 1044-1062.
  22. Samali, B., Li, J., Mayol, E. and Wu, Y.M. (1999), "System identification of a five storey benchmark model using modal analysis", Proceedings of the International Conference on Applications of Modal Analysis, Gold Coast, Queensland, Australia.
  23. Skinner, Robert Ivan, William H. Robinson and Graeme H. McVerry (1993), An introduction to seismic isolation, John Wiley & Sons.
  24. Sueoka, Toshiyuki, Shingo Torii and Yasuhiro Tsuneki (2004), "The application of response control design using middle-story isolation system to high-rise building", 13th World Conference on Earthquake Engineering, August.
  25. Tasaka, M., Mori, N., Yamamoto, H., Murakami, K. and Sueoka, T. (2008), "Applying seismic isolation to buildings in Japan-retrofitting and middle-story isolation", Proceeding of the 18th Analysis and Computation Specialty Conference, ASCE Structures Congress, Vancouver, BC, Canada.
  26. Tornello, M.E. and Sarrazin, M. (2012), "Base-isolated building with high-damping spring system subjected to near fault earthquakes", Earthq. Struct., 3(3-4), 315-340.
  27. Torunbalci, N. and Ozpalanlar, G. (2008), "Earthquake response analysis of mid-story buildings isolated with various seismic isolation techniques", The 14th World Conference on Earthquake Engineering, Beijing, China.
  28. Wang, F., Zhang, N. and Huang, Z. (2016), "Estimation of earthquake induced story hysteretic energy of multi-Story buildings", Earthq. Struct., 11(1), 165-178.
  29. Wu, Y. and Samali, B. (2002), "Shake table testing of a base isolated model", Eng. Struct., 24(9) 1203-1215.
  30. Xu, Z., Hu, M. and Zhou, F. (2004), "Discussion on mid-story isolation of building", Earthq. Resist. Eng., 5, 004.
  31. Yu, Y., Li, Y. and Li, J. (2015), "Parameter identification and sensitivity analysis of an improved LuGre friction model for magnetorheological elastomer base isolator", Meccanica, 50(11), 2691-2707.
  32. Yu, Y., Li, Y., Li, J. and Gu, X. (2016), "A hysteresis model for dynamic behaviour of magnetorheological elastomer base isolator", Smart Mater. Struct., 25(5), 055029.

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