Geomechanics and Engineering

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SSI effects on seismic behavior of smart base-isolated structures

  • Shourestani, Saeed (Department of Civil and Surveying Engineering, Graduate University of Advanced Technology) ;
  • Soltani, Fazlollah (Department of Civil and Surveying Engineering, Graduate University of Advanced Technology) ;
  • Ghasemi, Mojtaba (Department of Civil and Surveying Engineering, Graduate University of Advanced Technology) ;
  • Etedali, Sadegh (Department of Civil Engineering, Birjand University of Technology)
  • Received : 2017.01.03
  • Accepted : 2017.07.08
  • Published : 2018.02.10
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Abstract

The present study investigates the soil-structure interaction (SSI) effects on the seismic performance of smart base-isolated structures. The adopted control algorithm for tuning the control force plays a key role in successful implementation of such structures; however, in most studied carried out in the literature, these algorithms are designed without considering the SSI effect. Considering the SSI effects, a linear quadratic regulator (LQR) controller is employed to seismic control of a smart base-isolated structure. A particle swarm optimization (PSO) algorithm is used to tune the gain matrix of the controller in both cases without and with SSI effects. In order to conduct a parametric study, three types of soil, three well-known earthquakes and a vast range of period of the superstructure are considered for assessment the SSI effects on seismic control process of the smart-base isolated structure. The adopted controller is able to make a significant reduction in base displacement. However, any attempt to decrease the maximum base displacement results in slight increasing in superstructure accelerations. The maximum and RMS base displacements of the smart base-isolated structures in the case of considering SSI effects are more than the corresponding responses in the case of ignoring SSI effects. Overall, it is also observed that the maximum and RMS base displacements of the structure are increased by increasing the natural period of the superstructure. Furthermore, it can be concluded that the maximum and RMS superstructure accelerations are significant influenced by the frequency content of earthquake excitations and the natural frequency of the superstructure. The results show that the design of the controller is very influenced by the SSI effects. In addition, the simulation results demonstrate that the ignoring the SSI effect provides an unfavorable control system, which may lead to decline in the seismic performance of the smart-base isolated structure including the SSI effects.

Keywords

References

  1. Chaudhary, M.T.A., Abe, M. and Fujino, Y. (2001), "Identification of soil-structure interaction effect in base-isolated bridges from earthquake records", Soil Dyn. Earthq. Eng., 21(8), 713-725. https://doi.org/10.1016/S0267-7261(01)00042-2
  2. Cho, K.H., Kim, M.K., Lim, Y.M. and Cho, S.Y. (2004), "Seismic response of base-isolated liquid storage tanks considering fluid-structure-soil interaction in time domain", Soil Dyn. Earthq. Eng., 24(11), 839-852. https://doi.org/10.1016/j.soildyn.2004.05.003
  3. Constantinou, M.C. and Kneifati, M.C. (1986), "Effect of soil-structure interaction on damping and frequencies of base-isolated structures", Proceedings of the 3rd U.S. National Conference on Earthquake Engineering, Charleston, South Carolina, U.S.A., August.
  4. Du, K.L. and Swamy, M.N.S. (2016), Search and Optimization by Metaheuristics, Techniques and Algorithms Inspired by Mature, Springer Int. Ltd., Switzerland.
  5. Etedali, S. and Sohrabi, M.R. (2011), "Torsional strengthening of base-isolated asymmetric structures by increasing the flexible edge stiffness of isolation system", J. Civ. Envrion. Eng., 11(2), 51-59.
  6. Etedali, S. and Sohrabi, M.R. (2016), "A proposed approach to mitigate the torsional amplifications of asymmetric base-isolated buildings during earthquakes", KSCE J. Civ. Eng., 20(2), 768-776. https://doi.org/10.1007/s12205-015-0325-0
  7. Etedali, S., Sohrabi, M.R. and Tavakoli, S. (2013), "Optimal PD/PID control of smart base isolated buildings equipped with piezoelectric friction dampers", Earthq. Eng. Eng. Vibr., 12(1), 39-54. https://doi.org/10.1007/s11803-013-0150-8
  8. Etedali, S., Tavakoli, S. and Sohrabi, M.R. (2016), "Design of a decoupled PID controller via MOCS for seismic control of smart structures", Earthq. Struct., 10(5), 1067-1087. https://doi.org/10.12989/eas.2016.10.5.1067
  9. Fisco, N.R. and Adeli, H. (2011), "Smart structures: Part II-hybrid control systems and control strategies", Scientia Iranica, 18(3), 285-295. https://doi.org/10.1016/j.scient.2011.05.035
  10. Iemura, H. and Pradono, M.H. (2002), "Passive and semi-active seismic response control of a cable-stayed bridge", J. Struct. Contr. Health Monitor., 9(3), 189-204.
  11. Kim, M.K., Lim, Y.M., Cho, S.Y., Cho, K.H. and Lee, K.W. (2002), "Seismic analysis of base-isolated liquid storage tanks using the BE-FE-BE coupling technique", Soil Dyn. Earthq. Eng., 22(9), 1151-1158. https://doi.org/10.1016/S0267-7261(02)00142-2
  12. Kunde, M.C. and Jangid, R.S. (2006), "Effects of pier and deck flexibility on the seismic response of isolated bridges", J. Bridge Eng., 11(1), 109-121. https://doi.org/10.1061/(ASCE)1084-0702(2006)11:1(109)
  13. Liu, M.Y., Chiang, W.L., Hwang, J.H. and Chu, C.R. (2008), "Wind-induced vibration of high-rise building with tuned mass damper including soil-structure interaction", J. Wind Eng. Ind. Aerodyn., 96(6), 1092-1102. https://doi.org/10.1016/j.jweia.2007.06.034
  14. Mahmoud, S., Austrell, P.E. and Jankowski, R. (2012a), "Simulation of the response of base-isolated buildings under earthquake excitations considering soil flexibility", Earthq. Eng. Eng. Vibr., 11(3), 359-374. https://doi.org/10.1007/s11803-012-0127-z
  15. Mahmoud, S., Austrell, P.E. and Jankowski, R. (2012b), "Nonlinear behaviour of base-isolated building supported on flexible soil under damaging earthquakes", Key Eng. Mater., 488, 142-145.
  16. MATLAB (2000), The Math Works, Inc., Natick, Massachusetts, U.S.A.
  17. Mohebbi, M., Shakeri, K., Ghanbarpour, Y. and Majzoub, H. (2013), "Designing optimal multiple tuned mass dampers using genetic algorithms (GAs) for mitigating the seismic response of structures", J. Vibr. Contr., 19(4), 605-625. https://doi.org/10.1177/1077546311434520
  18. Nagarajaiah, S. and Narasimhan, S. (2006), "Smart base-isolated benchmark building. Part II: Phase I sample controllers for linear isolation systems", Struct. Contr. Health Monitor., 13(2-3), 589-604. https://doi.org/10.1002/stc.100
  19. Ozbulut, O.E. and Hurlebaus, S. (2010), "Fuzzy control of piezoelectric friction dampers for seismic protection of smart base isolated buildings", Bull. Earthq. Eng. 8(6), 1435-1455. https://doi.org/10.1007/s10518-010-9187-5
  20. Ozbulut, O.E., Bitaraf, M. and Hurlebaus, S. (2011), "Adaptive control of base-isolated structures against near-field earthquakes using variable friction dampers", Eng. Struct., 33(12), 3143-3154. https://doi.org/10.1016/j.engstruct.2011.08.022
  21. Parsopoulos, K.E. (2010), Particle Swarm Optimization and Intelligence: Advances and Applications: Advances and Applications, IGI Global.
  22. Perotti, F., Domaneschi, M. and De Grandis, S. (2013), "The numerical computation of seismic fragility of base-isolated nuclear power plants buildings", Nucl. Eng. Des., 262, 189-200. https://doi.org/10.1016/j.nucengdes.2013.04.029
  23. Sarrazin, M., Moroni, O. and Roesset, J.M. (2005), "Evaluation of dynamic response characteristics of seismically isolated bridges in Chile", Earthq. Eng. Struct. Dyn., 34(4-5), 425-448. https://doi.org/10.1002/eqe.443
  24. Soneji, B.B. and Jangid, R.S. (2008), "Influence of soil-structure interaction on the response of seismically isolated cable-stayed bridge", Soil Dyn. Earthq. Eng., 28(4), 245-257. https://doi.org/10.1016/j.soildyn.2007.06.005
  25. Spyrakos, C.C. and Vlassis, A.G. (2002), "Effect of soil-structure interaction on seismically isolated bridges", J. Earthq. Eng., 6(3), 391-429. https://doi.org/10.1080/13632460209350423
  26. Spyrakos, C.C., Koutromanos, I.A. and Maniatakis, C.A. (2009), "Seismic response of base-isolated buildings including soil-structure interaction", Soil Dyn. Earthq. Eng., 29(4), 658-668. https://doi.org/10.1016/j.soildyn.2008.07.002
  27. Spyrakos, C.C., Maniatakis, C.A. and Koutromanos, I.A. (2009), "Soil-structure interaction effects on base-isolated buildings founded on soil stratum", Eng. Struct., 31(3), 729-737. https://doi.org/10.1016/j.engstruct.2008.10.012
  28. Takewaki, I. (2005a), "Bound of earthquake input energy to soil-structure interaction systems", Soil Dyn. Earthq. Eng., 25(7), 741-752. https://doi.org/10.1016/j.soildyn.2004.11.017
  29. Takewaki, I. (2005b), "Frequency-domain analysis of earthquake input energy to structure-pile systems", Eng. Struct., 27(4), 549-563. https://doi.org/10.1016/j.engstruct.2004.11.014
  30. Tongaonkar, N.P. and Jangid, R.S. (2003), "Seismic response of isolated bridges with soil-structure interaction", Soil Dyn. Earthq. Eng., 23(4), 287-302. https://doi.org/10.1016/S0267-7261(03)00020-4
  31. Tsai, C.S., Chen, C.S. and Chen, B.J. (2004), "Effects of unbounded media on seismic responses of FPS-isolated structures", Struct. Control Health Monitor., 11(1), 1-20. https://doi.org/10.1002/stc.28
  32. Vlassis, A.G. and Spyrakos, C.C. (2001), "Seismically isolated bridge piers on shallow soil stratum with soil-structure interaction", Comput. Struct., 79(32), 2847-2861. https://doi.org/10.1016/S0045-7949(01)00105-5
  33. Weise, T. (2009), Global Optimization Algorithms-Theory and Application.
  34. Wolf, J.P. (1989), "Soil-structure-interaction analysis in time domain", Nucl. Eng. Des., 111(3), 381-393. https://doi.org/10.1016/0029-5493(89)90249-5
  35. Zamani, A.A., Tavakoli, S. and Etedali, S. (2017a), "Control of piezoelectric friction dampers in smart base-isolated structures using self-tuning and adaptive fuzzy proportional-derivative controllers", J. Intell. Mater. Syst. Struct., 28(10), 1287-1302. https://doi.org/10.1177/1045389X16667561
  36. Zamani, A.A., Tavakoli, S. and Etedali, S. (2017b), "Fractional order PID control design for semi-active control of smart base-isolated structures: A multi-objective cuckoo search approach", ISA Trans., 67, 222-232. https://doi.org/10.1016/j.isatra.2017.01.012
  37. Zhao, D. and Li, Y. (2015), "Fuzzy control for seismic protection of semi active base-isolated structures subjected to near-fault earthquakes", Math. Prob. Eng., (1), 1-17.

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