Ambient Vibration Testing and System Identification for Tall Buildings

고층건물의 자연 진동실험 및 시스템판별

  • Received : 2012.03.30
  • Accepted : 2012.05.22
  • Published : 2012.06.30


Dynamic response measurements from natural excitation were carried out for three 18-story office buildings to determine their inherent properties. The beam-column frame system was adopted as a typical structural form, but a core wall was added to resist the lateral force more effectively, resulting in a mixed configuration. To extract modal parameters such as natural frequencies, mode shapes and damping ratios from a series of vibration records at each floor, the most advanced operational system identification methods based on frequency- and time-domain like FDD, pLSCF and SSI were applied. Extracted frequencies and mode shapes from the different identification methods showed a greater consistency for three buildings, however the three lower frequencies extracted were 1.2 to 1.7 times as stiff as those obtained using the initial FE models. Comparing the extracted fundamental periods with those estimated from the code equations and FE analysis, the FE analysis results showed the most flexible behavior, and the most simple equation that considers the building height as the only parameter correlated fairly well with test results. It is recognized that such a discrepancy arises from the fact that the present tests exclude the stiffness decreasing factors like concrete cracking, while the FE models ignore the stiffness increasing factors, such as the contribution of non-structural elements and the actual material properties used.


Supported by : 한국학술진흥재단


  1. 대한건축학회, 건설교통부 제정 건축물 하중기준 및 해설, 2005.
  2. 조순호, "초고층건물의 성능평가를 위한 응답의존 시스템판별 및 모델향상," 한국지진공학회 논문집, Vol. 12, No. 4, 19-33, 2008.
  3. Applied Technology Council, Tentative provisions for the development of seismic regulations for buildings ATC 3-06, ATC, Redwood City, California, 1978.
  4. Brincker R., Andersen P., and Jacobsen N. J., "Automated Frequency Domain Decomposition for Operational Modal Analysis," Proc., 25th Int. Modal Analysis Conf., Orlando, Florida, USA, 2007
  5. Brinker, R., and Anderson, P., "A way of getting scaled mode shapes in output only modal testing," Proc., 21st Int. Modal Analysis Conf., Kissimmee, Florida, USA, 2003.
  6. Brinker, R., Zhang, L., and Anderson, P., "Modal identification from ambient responses using frequency domain decomposition," Proc.,18th Int. Modal Analysis Conf., San Antonio, Texas, USA, 2000.
  7. Cauberghe, B., "Applied frequency-domain system identification in the field of experimental and operational modal analysis," Ph.D. thesis, Dept. of Mech. Engrg., Vrije Universiteit Brussel, Brussels, Belgium, 2004.
  8. Ho, B. L., and Kalman, R. E., "Effective construction of linear state variable models from input/output data," Regelungstechnik, 14, 545-548, 1966.
  9. Juang, J.-N., Applied system identification, Prentice-Hall, Upper Saddle River, NJ, 1994.
  10. Midas IT, "Midas/Gen: General Structural Design System for Windows, Online Manual, V.7.1.1 (R2)," Korea, 2006.
  11. Peeters, B., and De Roeck, G., "Stochastic system identification for operational modal analysis: a review," J. Dyn. Syst., Meas., and Control, ASME, 123(12), 659-667, 2001.
  12. Peeters, B., "System identification and damage detection in civil engineering," Ph.D. thesis, Dept. of Civil Engrg., Katholieke Univ. Leuven, Heverlee, Belgium, 2000.
  13. Peeters, B., and De Roeck, G., "Reference-based stochastic subspace identification for output-only modal analysis," Mech. Syst. Signal Process., 13(6), 855-878, 1999.
  14. Peeters, B., Van Der Auweraer, H., Guillaume, P., and Leuridan J., "The PolyMAX frequency-domain method: a new standard for modal parameter estimation," Shock and Vib., Special Issue dedicated to Prof. Bruno Piombo,11, 395-409, 2004.
  15. Reynders, E., and De Roeck, G., "Reference-based combined deterministic-stochastic subspace identification for experimental and operational modal analysis," Mech. Syst. Signal Process., 22(3), 617-637, 2008.
  16. Reynders, E., and De Roeck, G., "What's New in System Identification for Experimental and Operational Modal Analysis," Proc., Thematic Conf. on Comput. Meth. in Struct. Dyn. and Earthq. Engrg., Rethymno, Crete, Greece, 2007.
  17. Standard Association of Australia, Minimum design loads on structures, Part 4: Earthquake loads AS1170.4, Sydney, Australia, 1993.
  18. Structural Vibration Solutions, "ARTeMIS Extractor: Ambient Response Testing and Modal Identification Software, User's Manual," Demark, 2001.
  19. Van Overschee, P., and De Moor, B., Subspace identification for linear systems: Theory-Implementation-Applications, Kluwer Academic Publishers, Dordrecht, The Netherlands, 1996.