Nuclear Engineering and Technology

  • 제54권3호
  • /
  • Pages.1071-1084
  • /
  • 2022
  • /
  • 1738-5733(pISSN)
  • /
  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
권호 표지
DOI QR코드

DOI QR Code

Dynamic characteristics of combined isolation systems using rubber and wire isolators

  • 투고 : 2021.04.14
  • 심사 : 2021.09.26
  • 발행 : 2022.03.25
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

The present study aims to investigate the dynamic properties of a novel isolation system composed of separate rubber and wire isolators. The testing program comprised pure compressive, pure-shear, compressive-stress dependence, and shear-strain dependence tests that used full-scale test specimens according to ISO 22762-1. A total of 22 test specimens were fabricated and investigated. Among the tests, the pure compressive test was a destructive test that reached up to the failure stage, whereas the others were nondestructive tests before the failure stage. Similar to the pure-shear test, at each compressive-stress level in the compressive dependence test or at each shear-strain level in the shear-strain dependence test, the cyclic loading was conducted for three cycles. In the nondestructive tests, examination of the dynamic shear properties in the X-direction was independent of the Y-direction. The test results revealed that the increase in the shear strain increased the energy dissipation but decreased the damping ratio, whereas the increase in the compressive stress increased the damping ratio. In addition, a macro model was developed to simulate the load-displacement response of the isolation systems, and the prediction results were consistent with the experimental results.

키워드

과제정보

This research was supported by a grant (21AUDP-C146352-04) from the Infrastructure and Transportation Technology Promotion Research Program, funded by the Ministry of Land, Infrastructure and Transport of the Korean Government, and by a grant (NRF-2020R1F1A1051051 and NRF-2021R1A6A1A03044977) from the Basic Science Research Program of the National Research Foundation of Korea, funded by the Ministry of Education.

참고문헌

  1. W. Wei, Y. Yuan, A. Igarashi, P. Tan, H. Iemura, H.P. Zhu, A generalized rate-dependent constitutive law for elastomeric bearings, Construct. Build. Mater. 106 (2016) 693-699. https://doi.org/10.1016/j.conbuildmat.2015.12.179
  2. G.P. Warn, K.L. Ryan, A review of seismic isolation for buildings: historical development and research needs, Buildings 2 (3) (2012) 300-325. https://doi.org/10.3390/buildings2030300
  3. H. Zhu, Z. Zhang, F. Zhou, H. Luo, X. Deng, Horizontal mechanical behavior of elastomeric bearings under eccentric vertical loading: full-scale tests and analytical modeling, Construct. Build. Mater. 125 (2016) 574-584. https://doi.org/10.1016/j.conbuildmat.2016.08.077
  4. P. Narjabadifam, P.L.Y. Tiong, R. Mousavi-Alanjagh, Effects of inherent structural characteristics on seismic performances of aseismically base-isolated buildings, Iran. J. Sci. Technol. Trans. Civil Eng. 44 (2019) 1385-1401. https://doi.org/10.1007/s40996-019-00317-4
  5. F. Naeim, J.M. Kelly, Design of Seismic Isolated Structures: from Theory to Practice, first ed., John Wiley and Sons, Hoboken, NJ, USA, 1999.
  6. D. Losanno, I.E.M. Sierra, M. Spizzuoco, J. Marulanda, P. Thomson, Experimental assessment and analytical modeling of novel fiber-reinforced isolators in unbounded configuration, Compos. Struct. 212 (2019) 66-82. https://doi.org/10.1016/j.compstruct.2019.01.026
  7. W.H. Robinson, Lead-rubber hysteretic bearings suitable for protecting structures during earthquakes, Earthq. Eng. Struct. Dynam. 10 (1982) 593-604. https://doi.org/10.1002/eqe.4290100408
  8. N. Fallah, G. Zamiri, Multi-objective optimal design of sliding base isolation using genetic algorithm, Sci. Iran. 20 (1) (2013) 87-96. https://doi.org/10.1016/j.scient.2012.11.004
  9. T. Nishi, S. Suzuki, M. Aoki, T. Sawada, S. Fukuda, International investigation of shear displacement capacity of various elastomeric seismic-protection isolators for buildings, J. Rubber Res. 22 (2019) 33-41. https://doi.org/10.1007/s42464-019-00006-x
  10. E. Tubaldi, S.A. Mittoulis, H. Ahmadi, A. Muhr, A parametric study on the axial behavior of elastomeric isolators in multi-span bridges subjected to horizontal seismic excitations, Bull. Earthq. Eng. 14 (2016) 1285-1310. https://doi.org/10.1007/s10518-016-9876-9
  11. M. Yamamoto, S. Minewaki, H. Yoneda, M. Higashino, Nonlinear behavior of high-damping rubber bearings under horizontal bidirectional loading: full-scale tests and analytical modeling, Earthq. Eng. Struct. Dynam. 41 (13) (2012) 1845-1860. https://doi.org/10.1002/eqe.2161
  12. American Society of Civil Engineers, Minimum Design Loads and Associated Criteria for Buildings and Other Structures, American Society of Civil Engineering, Virginia, USA, 2017. ASCE/SEI 7-16.
  13. International Organization for Standardization, Elastomeric Seismic-Protection Isolatorsd Part 1: Test Methods, ISO 22762-1, 2018 (Geneva, Switzerland).
  14. P.S. Balaji, L. Moussa, M.E. Rahman, L.H. Ho, An analytical study on the static vertical stiffness of wire rope isolators, J. Mech. Sci. Technol. 30 (1) (2016a) 287-295. https://doi.org/10.1007/s12206-015-1232-5
  15. P.S. Balaji, L. Moussa, M.E. Rahman, L.H. Ho, Static lateral stiffness of wire rope isolators, Mech. Base. Des. Struct. Mach. 44 (4) (2016b) 462-475. https://doi.org/10.1080/15397734.2015.1116996
  16. W.G. Liu, W.F. He, D.M. Feng, Q.R. Yang, Vertical stiffness and deformation analysis models of rubber isolators in compression and compression-shear states, J. Eng. Mech. 35 (9) (2009) 945-952.
  17. T.V. Ngo, A. Dutta, S.K. Deb, Evaluation of horizontal stiffness of fibre-reinforced elastomeric isolators, Earthq. Eng. Struct. Dynam. 46 (11) (2017) 1747-1767. https://doi.org/10.1002/eqe.2879
  18. N. Murota, T. Mori, An experimental study on scale effect in dynamic shear properties of high-damping rubber bearings, Front. Built Environ. 6 (2020) 37, https://doi.org/10.3389/fbuil.2020.00037.
  19. V. Gonca, S. Polukoshko, Buckling stability of multilayered rubber-metal vibration isolator, Vibroeng. Procedia 3 (2014) 319-325.
  20. K.N.G. Fuller, J. Gough, H.R. Ahmadi, Predicting the response of high damping rubber bearings using simplified models and finite element analysis, in: Proceedings of the International Atomic Energy Agency Meeting, vol. 50, also for Publication 1580 TARRC, Rubber Developments, St. Petersburg, Russia, 1996. No. 1/2, 1997.
  21. A. Purgstaller, P.Q. Gallo, S. Pampanin, K. Bergmeister, Seismic demands on nonstructural components anchored to concrete accounting for structure-fastener-nonstructural interaction (SFNI), Earthq. Eng. Struct. Dynam. 49 (6) (2020) 589-606. https://doi.org/10.1002/eqe.3255