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A new proposed Friction Multi-layered Elastomeric Seismic Isolator (FMESI)

  • Received : 2018.11.03
  • Accepted : 2019.11.09
  • Published : 2021.02.10

Abstract

Seismic isolation is one of the best-advanced methods for controlling seismic vibrations in buildings, bridges and nuclear facilities. A new Friction Multi-Layer Elastomeric Seismic Isolator (FMESI) has been modeled, analyzed and investigated by ABAQUS finite element analysis software and then, compared to real models. A number of friction cores have been used instead of the lead core therefore, some of the previous isolator problems have been almost resolved. Moreover, Studies show that the proposed isolator provides suitable initial stiffness and acceptable hysteresis behavior under different vertical and horizontal loading conditions and also internal stresses in different layers are acceptable. Also, as a result, the initial stiffness and overall area of the curves increase, as friction coefficients of the cores increase, although the frictional coefficients must be within a certain range.

Keywords

References

  1. Abdollahzadeh, G.R. and Darvishi, R. (2017), "Cyclic behavior of DCFP isolators with elliptical surfaces and different frictions", Struct. Eng. Mech., 64(6), 731-736. https://doi.org/10.12989/sem.2017.64.6.731
  2. Basu B., Bursi O.S., Casciati F., Casciati, S., Del Grosso, A.E., Domaneschi, M., Faravelli, L., Holnicki-Szulc, J., Irschik, H., Krommer, ., Lepidi, M., Martelli, A., Ozturk, B., Pozo, F., Pujol, G., Rakicevic, Z. and Rodellar, J. (2014), "A European association for the control of structures joint perspective. Recent studies in civil structural control across Europe", Struct. Control Health Monitor., 21(12), 1414-1436. https://doi.org/10.1002/stc.1652.
  3. Buckle, I.G. and Kelly, J.M. (1986), "Properties of slender elastomeric isolation bearings during shake table studies of a large-scale model bridge deck", Joint Sealing Bearing Syst. Concrete Struct. (American Concrete Institute), 1(2), 247-269.
  4. Constantinou, M.C., Kartoum, A., Kelly, J.M, (1992). "Analysis of compression of hollow circular elastomeric bearings", Eng. Struct., 142(2), 103-111.https://doi.org/10.1016/0141-0296(92)90036-P.
  5. Eroz, M. and DesRoches, R. (2008), "Bridge seismic response as a function of the Friction Pendulum System (FPS) modeling assumptions", Eng. Struct., 30(11), 3204-3212. https://doi.org/10.1016/j.engstruct.2008.04.032
  6. Eroz M., DesRoches R. (2013), "The influence of design parameters on the response of bridges seismically isolated with the Friction Pendulum System (FPS)", Eng. Struct., 56(1), 585-599 .https://doi.org/10.1016/j.engstruct.2013.05.020
  7. Amiri, G.G., Shalmaee, M.M. and Namiranian, P. (2016), "Evaluation of a DDB design method for bridges isolated with triple pendulum bearings", Struct. Eng. Mech., 59(5), 803-820. https://doi.org/10.12989/sem.2016.59.5.803.
  8. Hwang, J.S., Chiou, J.M., Sheng, L.H. and Gates, J.H. (1996), "A refined model for base-isolated bridge with bi-linear hysteretic bearings", Earthq. Spectra, 12(2), 245-273. https://doi.org/10.1193/1.1585879.
  9. Koh, C.G. and Kelly, J.M. (1986), "Effects of axial load on elastomeric bearings", Rep. UCB/EERC, Earthquake Engineering Research Center; 86(12), University of California, Berkeley, USA.
  10. Landi, L., Grazi, G. and Diotallevi, P.P. (2016), "Comparison of different models for friction pendulum isolators in structures subjected to horizontal and vertical ground motions", Soil Dynam. Earthq. Eng., 81(1), 75-83. https://doi.org/10.1016/j.soildyn.2015.10.016.
  11. Nguyen, H.H. and Tassoulas, J.L. (2010), "Directional effects of shear combined with compression on bridge elastomeric bearings", J. Bridge Eng., 15(1), 73-80. https://doi.org/10.1061/(asce)be.1943-5592.0000034.
  12. Pan, P., Ye, L.P., Shi, W. and Cao, H.Y. (2012), "Engineering practice of seismic isolation and energy dissipation structures in China", Sci. China Technol. Sci., 55(11), 3036-3046. https://doi.org/10.1007/s11431-012-4922-6.
  13. Ryan, K.L., Kelly, J.M. and Chopra, A.K, (2004), "Experimental observation of axial load effects in isolation bearings", Proceedings of 13th World Conference on Earthquake Engineering, 1(12) 1707, Vancouver, August.
  14. SAC Standardization Administration of the People's Republic of China (2006), Rubber Bearings-Part II: Elastomeric Seismic-Protection Isolators for Bridges, GB/T 20688.2-2006, Standardization Administration of the People's Republic of China, China. (in Chinese).
  15. Sayed, M.A., Go, S., Cho, S.G. and Kim, D. (2015), "Seismic responses of base-isolated nuclear power plant structures considering spatially varying ground motions", Struct. Eng. Mech., 54(1), 169-188. https://doi.org/10.12989/sem.2015.54.1.169.
  16. Stanton, J.F., Roeder, C.W., Mackenzie-Helnwein, P., White, C., Kuester, C. and Craig, B. (2007), "Rotation limits for elastomeric bearings", Washington D.C, National Cooperative Highway Research Program (NCHRP), Transportation Res. Board, 1(5), 120-140.
  17. Tyler, R.G. and Robinson, W.H. (1984), "High-strain tests on lead rubber bearings for earthquake loadings", Bullet. New Zealand National Soc. Earthq. Eng., 17(2), 90-105. https://doi.org/10.5459/bnzsee.17.2.90-105.
  18. Warn, G.P. and Ryan, K.L. (2012), "A review of seismic isolation buildings: historical development and research needs", Buildings, 2(3), 300-325. https://doi.org/10.3390/buildings2030300.
  19. Xing, C.X., Wang, H., Li, A.Q. and Wu, J.R. (2012), "Design and experimental verification of a new multi-functional bridge seismic isolation bearing", J. Zhejiang University Sci. A Appl. Phys. Eng., 13(12), 904-914. https://doi.org/10.1631/jzus.A1200106.
  20. Yi-Feng, H. (2017), "Explicit finite element analysis and experimental verification of a sliding lead rubber bearing", J. Zhejiang University Sci. A. China, 18(5), 363-376. https://doi.org/10.1631/jzus.A1600302.