Journal of the Korea institute for structural maintenance and inspection (한국구조물진단유지관리공학회 논문집)

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
권호 표지
DOI QR코드

DOI QR Code

Dynamic Responses of Base Isolation Devices for Telecommunication Equipment in Building Structures

건축물 내 방송통신설비를 위한 면진장치의 동적거동

  • 정새벽 (부산대학교 건축공학과) ;
  • 최형석 (부산대학교 지진방재연구센터) ;
  • 서영득 (부산대학교 지진방재연구센터) ;
  • 정동혁 (부산대학교 건축공학과)
  • Received : 2021.12.06
  • Accepted : 2021.12.22
  • Published : 2022.02.28
Download PDF
⟨ Previous Next ⟩

Abstract

In earthquake situations, broadcasting and communication services are directly linked to rapid on-site rescue and effective restoration works. Recently, a variety of base isolation devices are widely introduced on building floors to avoid critical seismic damages of telecommunication facilities. However, in buildings with long fundamental periods, those devices may have undesirable amplification of seismic responses due to resonance effect between the building floors and base isolation devices. This study performs the seismic safety evaluation of two types of base isolation devices deployed for telecommunication facilities in mid- and high-rise buildings through numerical and experimental approaches. It is found that mid- and high-rise buildings can have low-frequency dynamic responses at the top floor when being subjected to design basis earthquake loading. Furthermore, bi-directional shake table testing demonstrated that the selected base isolation devices can exhibit unstable dynamic behaviors under such low-frequency excitations of the floor.

지진 발생 시 방송통신서비스는 현장 구조 및 효과적인 복구 작업에 직결된다. 최근에 다양한 면진장치들이 방송통신설비의 심각한 피해를 방지하기 위하여 건물 층과 방송통신설비의 바닥부 사이에 설치하는 방법이 널리 사용되고 있다. 하지만 긴 고유주기를 가진 건물은 공진현상에 따른 예상치 못한 응답증폭으로 인하여 더 큰 피해가 발생할 수도 있다. 따라서 본 연구에서는 두 개의 면진장치를 선정 후 중층, 고층건물의 해석적, 실험적 연구를 통하여 면진장치가 바닥부에 설치된 방송통신설비의 내진 안전성을 평가를 목표로 한다. 해석적 연구를 수행하여 가진 시 중층, 고층건물 최고층의 저주파수 영역대의 동적응답을 확인하였다. 또한 해석적 연구에서 확보한 층응답을 바닥부에 면진장치가 설치된 방송통신 설비를구비하여 실증 실험을 통해 내진안정성을 평가하였다.

Keywords

Acknowledgement

이 과제는 부산대학교기본연구지원사업(2년)에 의하여 연구되었음.

References

  1. Anajafi, H., Poursadr, K., Roohi, M., and Santini-Bell, E. (2020), Effectiveness of Seismic Isolation for Long-period Structures Subject to Far-field and Near-field Excitations, F-rontiers in Built Environment, 6, 24. https://doi.org/10.3389/fubil.2020.00024
  2. Ariga, T., Kanno, Y., and Takewaki, I. (2006), Resonant Behaviour of Base-isolated High-Rise Buildings under Long-period Ground Motions, The Structural Design of Tall and Special Buildings, 15(3), 325-338 https://doi.org/10.1002/tal.298
  3. Hall, J. H., Heaton, T. H., Halling, M. W., and Wald, D. J. (1995), Near-source Ground Motion and its Effect on Fl-exible Buildings, Earthquake Spectra, EERI, 11(4), 569-605 https://doi.org/10.1193/1.1585828
  4. Heaton, T. H., Hall, J. H., Wald, D. J., and Halling, M. W. (1995), Response of High-rise and Base-isolated Buildin-gs to a Hypothetical MW 7.0 Blind Thrust Earthquake, Sc-ience, 2667(5195), 206-211.
  5. Iemura, H., Taghikhany, T., and Jain, S. K. (2007), Optim-um Design of Resilient Sliding Isolation System for Seismi-c Protection of Equipment, Bulletin of Earthquake Enginee-ring, 5(1), 85-103. https://doi.org/10.1007/s10518-006-9010-5
  6. International Code Council (ICC-ES AC156). (2010), Acceptance Criteria for Seismic Certification by Shake-table Tes-ting of Nonstructural Components, USA.
  7. International Electrotechnical Commission (IEC 60068-2-57: 2013). (2013), Environmental Testing - Part 2-57: Tests - Test Ff: Vibration-Time-history and Sine-beat Method
  8. Irikura, K., Kamae, K., and Kawabe, H. (2004), Importanc-e of Prediction of Long-period Ground Motion during Larg-e Earthquakes, Annual Conference of the Seismological So-ciety of Japan, Poster Session, Fukuoka.
  9. Ismail, M., Rodellar, J., and Ikhouane, F. (2009), An Inno-vative Isolation Bearing for Motion-sensitive Equipment, Jo-urnal of Sound and Vibration, JSV, 326(3-5), 503-521. https://doi.org/10.1016/j.jsv.2009.06.022
  10. Jangid, R. S., and Datta, T. K. (1994), Non-linear Respon-se of Torsionally Coupled Base Isolated Structure, Journal of Structural Engineering, JSEG, 120(1), 35-44.
  11. Kim, K.Y., Kim, T.H., and Lee, T.H. (2002), Experimental Study of the Small Scaled Base-isolated Steel Structure, Jo-urnal of Architectural Institute of Korea - Structure & Con-struction, AIK, 22(02)
  12. Kobayashi, M. (2014), Experience of infrastructure damage caused by the Great East Japan Earthquake and Countermeasures again-st Future Disasters, IEEE Communications Magazine, 52(3), 23-29. https://doi.org/10.1109/MCOM.2014.6766080
  13. Korea Authority of Land & Infrastructure Safety. (2019), Seismic Performance Evaluation of Existing Structures (Buildings), Korea Authority of Land & Infrastructure Safety, Jinju, Korea.
  14. Li, H. N., and Wu, X. X. (2006), Limitations of Height-to-width Ratio for Base-isolated Buildings under Earthquake, T-he Structural Design of Tall and Special Buildings, 15(3), 277-287. https://doi.org/10.1002/tal.295
  15. Lopez Garcia, D., and Soong, T. T. (2003(a)), Sliding Fragili-ty of Block-Type Nonstructural Components. Part 1: Unres-trained Components, Earthquake Engineering and Structura-l Dynamics, 32(1), 111-129. https://doi.org/10.1002/eqe.217
  16. Lopez Garcia, D., and Soong, T. T. (2003(b)), Sliding Fragili-ty of Block-Type Nonstructural Components. Part 2: Restra-ined Components, Earthquake Engineering and Structural Dynamics, 32(1), 131-149. https://doi.org/10.1002/eqe.218
  17. Ministry of Land, Infrastructure and Transport. (2019), Seismic Design Standard for Buildings (KDS 41 17 00:2019), Ministry of Land, Infrastructure and Transport, Sejong, Korea.
  18. Miranda E., Mosqueda G., Retamales R. and Pekcan G. (2012), Performance of Nonstructural Components during the 27 February 2010 Chile Earthquake, Earthquake Spectra, EERI, 28(1), 453-471. https://doi.org/10.1193/1.4000032
  19. Morales, C. A. (2003), Transmissibility Concept to Control Base Motion in Isolated Structures, Engineering Structures, 25(10), 1325-1331. https://doi.org/10.1016/S0141-0296(03)00084-1
  20. National Radio Research Agency (NRRA). (2016), Seismic Test Method for Telecommunication Facilities, Naju, Korea.
  21. Naeim, F., and Kelly, J. M. (1999), Design of Seismic Isol-ated Structures, John Wiley & Sons, Inc, 1-23.
  22. NEBS Requirements: Pysical Protection (GR-63-CORE). (2016), Telcordia Technologies, Inc., Network Equipment Build-ing System Generic Requirements 63 Core, Issue 3, New Jersey, USA.
  23. Oh, S.H., Choi, K.Y., Ryu, H.S., and Kim, Y.J. (2018), An Experiment Study on Verification for the Performance of S-eismic Retrofit System Using of Dual Frame with Different Eigenperiod, Journal of the Korea Institute for Structural Maintenance and Inspection, KSMI, 22(5), 91-100 https://doi.org/10.11112/JKSMI.2018.22.5.091
  24. Saito, T. (2016), Response of High-rise Building under Lon-g Period Earthquake Ground Motions, International Journal of Structural and Civil Engineering Research, 5(4), 308-314.