Journal of the Computational Structural Engineering Institute of Korea (한국전산구조공학회논문집)

Computational Structural Engineering Institute of Korea (한국전산구조공학회)
권호 표지

Application of Smart Base Isolation System for Seismic Response Control of an Arch Structure

아치구조물의 지진응답제어를 위한 스마트 면진시스템의 적용

  • Received : 2010.09.07
  • Accepted : 2011.01.05
  • Published : 2011.04.30
Download PDF
⟨ Previous Next ⟩

Abstract

Base isolation system is widely used for reduction of dynamic responses of structures subjected to seismic load. Recently, research on a smart base isolation system that can effectively reduce dynamic responses of the isolated structure without accompanying increases in base drifts has been actively conducted. In this study, a smart base isolation system was applied to an arch structure subjected to seismic excitation and its control performance for reduction of seismic responses was evaluated. In order to make a smart base isolation system, 4kN MR dampers and low damping elastomeric bearings were used. Seismic response control performance of the proposed smart base isolation system was compared to that of the optimally designed lead-rubber bearing(LRB) isolation system. To this end, an artificial ground motion developed based on KBC2009 design response spectrum was used as a seismic excitation. Fuzzy control algorithm was used to control MR damper in the smart base isolation system and multi-objective genetic algorithm was employed to optimize the fuzzy controller. Based on numerical simulation results, it has been shown that the smart base isolation system can drastically reduce base drifts and seismic responses of the example arch structure in comparison with LRB isolation system.

지진하중이 가해지는 구조물의 동적응답을 줄이기 위해서 면진장치가 널리 사용되고 있다. 근래에 들어서는 면진층의 변위를 증가시키지 않으면서도 면진된 구조물의 동적응답을 효과적으로 줄일 수 있는 스마트 면진시스템에 대한 연구가 활발히 이루어지고 있다. 이에 본 연구에서는 지진하중을 받는 아치구조물의 동적응답을 저감시키기 위하여 스마트 면진시스템을 적용하였고 제어성능을 검토하였다. 스마트 면진시스템을 구성하기 위하여 4kN 용량의 MR 감쇠기와 저감쇠 탄성 고무베어링을 사용하였다. 제안된 스마트 면진시스템의 제어성능을 검토하기 위하여 최적설계된 LRB와 지진응답 제어성능을 비교하였다. 이를 위하여 KBC2009 설계응답스펙트럼에 맞추어 생성한 인공지진파를 지진하중으로 사용하였다. 스마트 면진시스템의 MR 감쇠기를 제어하기 위하여 퍼지제어기를 사용하였으며, 다목적 유전자알고리즘을 이용하여 최적화하였다. 수치해석결과 스마트 면진시스템을 사용하면 LRB를 사용한 경우와 비교하여 면진층 변위와 아치구조물의 지진응답을 크게 줄일 수 있음을 확인하였다.

Keywords

References

  1. 강주원, 정찬우 (2008) 대공간 건축물의 형태별 지진거동 특성, 한국공간구조학회지, 8(1), pp.5-12.
  2. 김기철, 김광일, 강주원 (2008) 면진 트러스-아치 구조물의 지진거동분석, 한국공간구조학회 논문집, 8(2), pp.73-84.
  3. 김현수, Roschke, P.N. (2005) 유전자 알고리즘을 이용한 스마트 면진시스템의 퍼지제어, 한국지진공학회 논문집, 9(2), pp.37-46.
  4. 정형조, 최강민, 장지은, 이인원 (2005) MR감쇠기가 설치된 지진격리 건물의 스마트 진동제어, 한국지진공학회 학술대회 논문집, pp.544-551.
  5. Deb, K., Pratap, A., Agrawal, S., Meyarivan, T. (2000) A Fast Elitist Non-Dominated Sorting Genetic Algorithm for Multi-Objective Optimization: NSGA-II, Technical Report No. 200001, Kanpur: Indian Institute of Technology Kanpur, India.
  6. Hall, J.F., Heaton, T.H., Halling, M.W., Wald D.J. (1995) Near-Source Ground Motion and its Effects on Flexible Buildings, Earthquake Spectra, 11(4), pp.569-605. https://doi.org/10.1193/1.1585828
  7. Heaton, T.H., Hall, J.F., Wald, D.J., Halling M.W. (1995) Response of High-Rise and Base-Isolated Buildings in a Hypothetical Mw 7.0 Blind Thrust Earthquake, Science, 267, pp.206-211. https://doi.org/10.1126/science.267.5195.206
  8. Johnson, E.A., Ramallo, J.C., Spencer Jr., B.F., Sain, M.K. (1999) Intelligent Base Isolation Systems, Proc. 2nd World Conf. on Structural Control, Kyoto, Japan, pp.367-376.
  9. Kelly, J.M. (1999) The Role of Damping in Seismic Isolation, Earthquake Eng. Struct. Dyn., 28, pp.30-20. https://doi.org/10.1002/(SICI)1096-9845(199901)28:1<3::AID-EQE801>3.0.CO;2-D
  10. Moghaddam, H.A. (2000), Seismic Behavior of Space Structures, International Journal of Space Structure, 15(2), pp.119-135. https://doi.org/10.1260/0266351001495026
  11. Naeim, F., Kelly, J.M. (1999) Design of Seismic Isolated Structures: from Theory to Practice. Wuley: New York.
  12. Narasimhan, S., Nagarajaiah, S. (2006) Phase I Smart Base Isolated Benchmark Building-Sample Controllers for Linear Isolation System: Part II, J. of Struct. Control and Health Monitoring, 13, pp.589-604. https://doi.org/10.1002/stc.100
  13. Ramallo, J.C., Johnson, E.A., Spencer Jr., B.F. (2002) "Smart" Base Isolation Systems, Journal of Engineering Mechanics, 128(10), pp.1088-1100. https://doi.org/10.1061/(ASCE)0733-9399(2002)128:10(1088)
  14. Sadeghi, A. (2004) Horizontal Earthquake Loading and Linear/Nonlinear Seismic Behavior of Double Layer Barrel Vaults, International Journal of Space Structure, 19(1), pp.21-37. https://doi.org/10.1260/026635104322988344
  15. Spencer Jr., B.F., Johnson, E.A., Ramallo, J.C. (2000) Smart Isolation for Seismic Control, JSME Int. J. Ser. C., 43(4), pp.704-711. https://doi.org/10.1299/jsmec.43.704
  16. Tatemich, I., Kawaguchim M. (2000), A New Approach to Seismic Isolation: Possible Application in Space Structures, International Journal of Space Structure, 15(2), pp.145-154. https://doi.org/10.1260/0266351001495044
  17. Yoshida, O., Dyke, S.J. (2004) Seismic Control of a Nonlinear Benchmark Building using Smart Dampers, Journal of Engineering Mechanics, ASCE, 130(4), pp.386-392. https://doi.org/10.1061/(ASCE)0733-9399(2004)130:4(386)