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

Computational Structural Engineering Institute of Korea (한국전산구조공학회)
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Real-time Hybrid Testing a Building Structure Equipped with Full-scale MR dampers and Application of Semi-active Control Algorithms

대형 MR감쇠기가 설치된 건축구조물의 실시간 하이브리드 실험 및 준능동 알고리즘 적용

  • Published : 2008.10.30
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Abstract

The real-time hybrid testing method(RT-HYTEM) is a structural testing technique in which the numerical integration of the equation of motion for a numerical substructure and the physical testing for an experimental substructure are performed simultaneously in real-time. This study presents the quantitative evaluation of the seismic performance of a building structure installed with an passive and semi-active MR damper by using RT-HYTEM. The building model that was identified from the force-vibration testing results of a real-scaled 5-story building is used as the numerical substructure, and an MR damper corresponding to an experimental substructure is physically tested by using the universal testing machine(UTM). The RT-HYTEM implemented in this study is validated because the real-time hybrid testing results obtained by application of sinusoidal and earthquake excitations and the corresponding analytical results obtained by using the Bouc-Wen model as the control force of the MR damper respect to input currents were in good agreement. Also for preliminary study, some semi-active control algorithms were applied to the MR damper in order to control the structural responses optimally. Comparing between the test results of semi-active control using RT-HYTEM and numerical analysis results show that the RT-HYTEM is more resonable than numerical analysis to evaluate the performance of semi-active control algorithms.

실시간 하이브리드 실험법(real-time hybrid testing method)은 구조물의 수치해석부와 실험부 부분구조를 운동방정식으로 통합하여 실시 간으로 동시에 계산과 실험을 수행하는 방법이다 본 연구는 실시간 하이브리드 실험법을 사용하여 수동 및 준능동 MR감쇠기가 설치된 건축구조물의 내진성능을 정량적으로 평가한다. 건물 모델은 실물 크기 5층 건물을 강제진동실험 결과를 통해 식별한 수치모델로 사용하였고, MR감쇠기는 실험적 부분구조르 UTM에 설치되었다. 본 연구에서 수행되는 실시간 하이브리드 실험은 사인파 및 지진파 가진을 통하여 얻은 결과와 전류에 따른 MR감쇠기의 제어력을 이용하여 얻은 Bouc-Wen모델을 사용하여 얻은 해석모델과 일치함으로 그 유효성을 입증하였다. 또한 예비연구로써 구조물의 응답을 최적으로 제어하기 위한 clipped-optimal 제어알고리즘과 modulated homogeneous friction 준능동 제어알고리즘을 MR감쇠기에 적용하였다. 각 전류별 Bouc-Wen모델을 곡선맞춤하여 각각의 Bouc-Wen모델 파라미터를 식별하였으며 그 결과를 준능동 제어알고리즘 수치해석에 적용하였다. 또한 실시간 하이브리드 실험법을 이용한 준능동 제어 실험결과와 해석결과를 비교하여 준능동 제어알고리즘의 성능을 평가함에 있어 실시간 하이브리드 실험이 합리적임을 보여준다.

Keywords

References

  1. Dyke S.J., Spencer Jr. B.F., Sain M.K., Carlson J.D. (1996) Modeling and control of magnetorheological dampers for seismic response reduction, Smart Materials and Structures, pp.565-575
  2. Inaudi J.A. (1997) Modulated Homogeneous Friction : a Semi-active Damping Strategy, Earthquake Engineering and structural Dynamics, 26, pp.361-376 https://doi.org/10.1002/(SICI)1096-9845(199703)26:3<361::AID-EQE648>3.0.CO;2-M
  3. Jansen L. M., Dyke S. J. (2000) Semi-Active Control strategies for MR Dampers : A Comparative Study, ASCE Journal of Engineering Mechanics, 126(8), pp.795-803 https://doi.org/10.1061/(ASCE)0733-9399(2000)126:8(795)
  4. Lee H.J., Yang. G., Jung H.J., Spencer Jr. B. F., Lee I.W. (2006) Semi-active neurocontrol of a base-isolated benchmark structure, Struct. Control Health Monit., 13, pp.682-692
  5. Lee S.K, Park E. C., Min K.W., Lee S.H., Chung L., Park J.H. (2007) Real-time hybrid shaking table testing method for the performance evaluation of a tuned liquid damper controlling seismic response of building structures, Journal of Sound and Vibration 302, pp.596-612 https://doi.org/10.1016/j.jsv.2006.12.006
  6. Nakashima M., Kato H., Takaokas E. (1992) Development of real-time pseudo dynamic testing, Earthquake Engineering and Structural Dynamics, 21, pp.79-92 https://doi.org/10.1002/eqe.4290210106
  7. Yang G., Spencer Jr. B.F., Jung H.J., Carlson J.D. (2004) Dynamic Modeling of Large-Scale Magnetorheological Damper Systems for Civil Engineering Applications, J. Engrg. Mech., 130(9), pp.1107-1114 https://doi.org/10.1061/(ASCE)0733-9399(2004)130:9(1107)