Earthquakes and Structures

  • 제19권2호
  • /
  • Pages.129-144
  • /
  • 2020
  • /
  • 2092-7614(pISSN)
  • /
  • 2092-7622(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Sloped rolling-type bearings designed with linearly variable damping force

  • Wang, Shiang-Jung (Department of Civil and Construction Engineering, National Taiwan University of Science and Technology) ;
  • Sung, Yi-Lin (Department of Civil and Construction Engineering, National Taiwan University of Science and Technology) ;
  • Hong, Jia-Xiang (Department of Civil and Construction Engineering, National Taiwan University of Science and Technology)
  • 투고 : 2020.03.25
  • 심사 : 2020.08.08
  • 발행 : 2020.08.25
⟨ 이전 논문 다음 논문 ⟩

초록

In this study, the idea of damping force linearly proportional to horizontal isolation displacement is implemented into sloped rolling-type bearings in order to meet different seismic performance goals. In addition to experimentally demonstrating its practical feasibility, the previously developed analytical model is further modified to be capable of accurately predicting its hysteretic behavior. The numerical predictions by using the modified analytical model present a good match of the shaking table test results. Afterward, several sloped rolling-type bearings designed with linearly variable damping force are numerically compared with a bearing designed with conventional constant damping force. The initial friction damping force adopted in the former is designed to be smaller than the constant one adopted in the latter. The numerical comparison results indicate that when the horizontal isolation displacement does not exceed the designed turning point (or practically when subjected to minor or frequent earthquakes that seldom have a great displacement demand for seismic isolation), the linearly variable damping force design can exhibit a better acceleration control performance than the constant damping force design. In addition, the former, in general, advantages the re-centering performance over the latter. However, the maximum horizontal displacement response of the linearly variable damping force design, in general, is larger than that of the constant damping force design. It is particularly true when undergoing a horizontal isolation displacement response smaller than the designed turning point and designing a smaller value of initial friction damping force.

키워드

과제정보

The study was financially aided by the Ministry of Science and Technology (MOST) of Taiwan [103-2221-E-492-005-], and was experimentally supported by the National Center for Research on Earthquake Engineering (NCREE), National Applied Research Laboratories (NARL) of Taiwan. The support is greatly acknowledged.

참고문헌

  1. Abdollahzadeh G. 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. AC156 (2010), Acceptance criteria for seismic certification by shake-table testing of nonstructural components. ICC Evaluation Service, LLC.
  3. Baker, J.W. (2007), "Quantitative classification of near-fault ground motions using wavelet analysis", Bull. Seismol. Soc. Amer., 97(5), 1486-1501. https://doi.org/10.1785/0120060255.
  4. Calvi, P.M., Moratti, M. and Calvi, G.M. (2008), "Seismic isolation devices based on sliding between surfaces with variable friction coefficient", Earthq. Spectra, 32(4), 2291-2315. https://doi.org/10.1193/091515EQS139M.
  5. Chai, J.F., Loh, C.H. and Sato, T. (2002), "Modeling of phase spectrum to simulate design ground motions", J. Chinese Institute Eng., 25(4), 447-459. https://doi.org/10.1080/02533839.2002. 9670719.
  6. Chang, S.P., Makris, N., Whittaker, A.S. and Thompson, A.C.T. (2002), "Experimental and analytical studies on the performance of hybrid isolation systems", Earthq. Eng. Struct. Dyn., 31(2), 421-443. https://doi.org/10.1002/eqe.117.
  7. Chopra, A.K. and Chintanapakdee, C. (2014), "Comparing response of SDF systems to near-fault and far-fault earthquake motions in the context of spectral regions", Earthq. Eng. Struct. Dyn., 30(12), 1769-1789. https://doi.org/10.1002/eqe.92.
  8. Constantinou, M.C., Mokha, A. and Reinhorn, A. (1990), "Teflon bearings in base isolation II: modeling", J. Structural Eng., ASCE, 116(2), 455-474. https://doi.org/10.1061/(ASCE)0733-9445(1990)116:2(455).
  9. Fenz, D.M. and Constantinou, M.C. (2006), "Behaviour of the double concave friction pendulum bearing", Earthq. Eng. Struct. Dyn., 35(11), 1403-1424. https://doi.org/10.1002/eqe.589.
  10. Fenz, D.M. and Constantinou, M.C. (2008), "Modeling triple friction pendulum bearings for response-history analysis", Earthq. Spectra, 24(4), 1011-1028. https://doi.org/10.1193/1.2982531.
  11. Ghobarah, A. (2001), "Performance-based design in earthquake engineering: state of development", Eng. Struct., 23(8), 878-884. https://doi.org/10.1016/S0141-0296(01)00036-0.
  12. Hadjian, A.H. (1982), "A re-evaluation of equivalent linear models for simple yielding systems", Earthq. Eng. Struct. Dyn., 10(6), 759-767. https://doi.org/10.1002/eqe.4290100602.
  13. Harvey, Jr. P.S. and Kelly, K.C. (2016), "A review of rolling-type seismic isolation: historical development and future directions", Eng. Struct., 125(15), 521-531. https://doi.org/10.1016/j.engstruct.2016.07. 031.
  14. He, W.L., Agrawal, A.K. and Yang, J.N. (2003), "Novel semiactive friction controller for linear structures against earthquakes", J. Struct. Eng., ASCE, 129(7), 941-950. https://doi.org/10.1061/(ASCE)0733-9445(2003)129:7(941).
  15. Hwang, J.S. (1996), "Evaluation of equivalent linear analysis methods of bridge isolation", J. Struct. Eng., ASCE, 122(8), 972-976. https://doi.org/10.1061/(ASCE)0733-9445(1996)122:8(972).
  16. Hwang, J.S., Huang, Y.N., Hung, Y.H. and Huang, J.C. (2004), "Applicability of seismic protective systems to structures with vibration sensitive equipment", J. Struct. Eng., ASCE, 130(11), 1676-1684. https://doi.org/10.1061/(ASCE)0733-9445(2004)130:11(1676).
  17. Iwan, W.D. and Gates, N.C. (1979), "The effective period and damping of a class of hysteretic structures", Earthq. Eng. Struct. Dyn., 7(3), 199-221. https://doi.org/10.1002/eqe.4290070302.
  18. Jangid, R.S. (2017), "Optimum friction pendulum system for near-fault motions", Eng. Struct., 27(3), 349-359. https://doi.org/10.1016/j.engstruct.2004.09.013.
  19. Jangid, R.S. and Kelly, J.M. (2001), "Base isolation for near-fault motions", Earthq. Eng. Struct. Dyn., 30(5), 691-707. https://doi.org/10.1002/eqe.31.
  20. Kasalanati, A., Reinhorn, A.M., Constantinou, M.C. and Sanders, D. (1997), "Experimental study of ball-in-cone isolation system", The Proceedings of the ASCE Structures Congress XV, Portland, Oregon, U.S.A, April.
  21. Kelly, J.M. (1990), "Base isolation: linear theory and design", Earthq. Spectra, 6(2), 223-244. https://doi.org/10.1193/1.1585566.
  22. Lee, G.C., Ou, Y.C., Niu, T., Song, J. and Liang, Z. (2010), "Characterization of a roller seismic isolation bearing with supplemental energy dissipation for highway bridges", J. Struct. Eng., ASCE, 136(5), 502-510. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000136.
  23. Makris, N. and Chang, S.P. (2000), "Effect of viscous, viscoplastic and friction damping on the response of seismic isolated structures", Earthq. Eng. Struct. Dyn., 29(1), 85-107. https://doi.org/10.1002/(SICI)10969845(200001)29:1<85::AIDEQE902>3.0.CO;2-N.
  24. Panchal, V.R. and Jangid, R.S. (2008), "Variable friction pendulum system for near-fault ground motions", Struct. Control Heal. Monit., 15(4), 568-584. https://doi.org/10.1002/stc.216.
  25. Ponzo, F.C., Cesare, A.D., Leccese, G. and Nigro, D. (2017), "Shake table testing on restoring capability of double concave friction pendulum seismic isolation systems", Earthq. Eng. Struct. Dyn., 46(14), 2337-2353. https://doi.org/10.1002/eqe.2907.
  26. Providakis, C.P. (2008), "Effect of LRB isolators and supplemental viscous dampers on seismic isolated buildings under near-fault excitations", Eng. Struct., 30(5), 1187-1198. https://doi.org/10.1016/j.engstruct.2007.07.020.
  27. Shahbazi P. and Taghikhany T. (2017), "Sensitivity analysis of variable curvature friction pendulum isolator under near-fault ground motions", Smart Struct. Syst., 20(1), 23-33. https://doi.org/10.12989/sss.2017.20.1.023.
  28. Tadjbakhsh, I. and Lin, B.C. (1987), "Displacement-proportional friction (DPF) in base isolation", Earthq. Eng. Struct. Dyn., 15(7), 799-813. https://doi.org/10.1002/eqe.4290150702.
  29. Tsai, M.H., Wu, S.Y., Chang, K.C. and Lee, G.C. (2007), "Shaking table tests of a scaled bridge model with rolling type seismic isolation bearings", Eng. Struct., 29(9), 694-702. https://doi.org/10.1016/j.engstruct.2006.05.025.
  30. Vargas, R. and Bruneau, M. (2009), "Experimental response of buildings designed with metallic structural fuses. II", J. Struct. Eng., ASCE, 135(4), 394-403. https://doi.org/10.1061/(ASCE)0733-9445(2009)135:4(394).
  31. Wang, S.J., Hwang, J.S., Chang, K.C., Shiau, C.Y., Lin, W.C., Tsai, M.S., Hong, J.X. and Yang, Y.H. (2014), "Sloped multiroller isolation devices for seismic protection of equipment and facilities", Earthq. Eng. Struct. Dyn., 43(10), 1443-1461. https://doi.org/10.1002/eqe.2404.
  32. Wang, S.J., Yu, C.H., Cho, C.Y. and Hwang, J.S. (2019), "Effects of design and seismic parameters on horizontal displacement responses of sloped rolling-type seismic isolators", Struct. Control Heal. Monit., 26(5). https://doi.org/10.1002/stc.2342.
  33. Wang, S.J., Yu, C.H., Lin, W.C., Hwang, J.S. and Chang, K.C. (2017), "A generalized analytical model for sloped rolling-type seismic isolators", Eng. Struct., 138, 434-446. https://doi.org/10.1016/j.engstruct.2016.12.027.
  34. Wei B., Wang P., He X., Zhang Z. and Chen L. (2017), "Effects of friction variability on a rolling-damper-spring isolation system", Earthq. Struct., 13(6), 551-559. https://doi.org/10.12989/eas.2017.13.6.551.
  35. Yurdakul M. and Ates S. (2018), "Stochastic responses of isolated bridge with triple concave friction pendulum bearing under spatially varying ground motion", Struct. Eng. Mech., 65(6), 771-784. https://doi.org/10.12989/sem.2018.65.6.771.

피인용 문헌

  1. Control Performances of Friction Pendulum and Sloped Rolling-Type Bearings Designed with Single Parameters vol.10, pp.20, 2020, https://doi.org/10.3390/app10207200
  2. Early adjusting damping force for sloped rolling-type seismic isolators based on earthquake early warning information vol.20, pp.1, 2020, https://doi.org/10.12989/eas.2021.20.1.039