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http://dx.doi.org/10.7781/kjoss.2012.24.1.001

Development of Time Lag Considered (TLC) Crowd Load Model Based on Probabilistic Approach  

Kim, Sung-Yong (서울대학교 건축학과)
Lee, Cheol-Ho (서울대학교 건축학과)
Publication Information
Journal of Korean Society of Steel Construction / v.24, no.1, 2012 , pp. 1-11 More about this Journal
Abstract
To overcome the limitations of current evaluation procedures for floor vibration under crowd loading, two kinds of uncertainties associated with individual time lag differences and the complex behavior of crowd should be taken into account. The complex behavior of crowds has yet to be fully described, even though individual differences can be dealt with statistically. This paper proposes time lag considered (TLC) crowd model based on a probabilistic approach. The load reduction factor, which reflects the effect of a general degree of synchronization among crowd, is proposed. Extensive Monte Carlo simulations were carried out to determine various crowd behaviors by using the TLC crowd model proposed. The TLC crowd model can rationally treat the energy loss of various crowd patterns. This indicates that it may be used as a theoretical basis in refining dynamic load factor of crowd loading.
Keywords
floor vibration; crowd load model; spectral density function; Monte Carlo simulations;
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  • Reference
1 Bachmann H. and Ammann W. (1987) Vibrations in Structures: Induced by Man and Machines, International Association for Bridge and Structural Engineering Proceedings, pp. 1-176
2 Blanchard J., Davies B.L., and Smith J.W. (1987) Design Criteria and Analysis for Dynamic Loading of Footbridges, Crowghorne, UK.
3 Ermentrout, G.B. and Rinzel, J. (1984) Beyond a Pacemaker's Entrainment Limit: Phase Walk-through, American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, Vol. 246, pp. 102-106.   DOI
4 Juan, A.A., Bonilla, L.L., Conrad, J.P.V., Felix. R., and Renato, S. (2005) The Kuramoto Model: a Simple Paradigm for Synchronization Phenomena, Rev. Mod. Phys., The American Physical Society, Vol. 77, pp. 137-185.   DOI   ScienceOn
5 Matsumoto, Y., Nishioka, T., Shiojiri, H., and Matsuzaki, K. (1978) Dynamic Design of Footbridges, International Association for Bridge and Structural Engineering Proceedings, No. P-17/18: pp. 1-15.
6 McConnell, G.K. (1995) Vibration Testing Theory and Practice, John Wiley & Sons, Inc., USA.
7 Nathabandu, T.K. and Renzo, R. (1997) Statistics, Probability and Reliability for Civil and Environmental Engineers, The McGraw-Hill Companies, Inc., USA.
8 Rainer, J.H., Pernica, G., and Allen, D.E. (1988) Dynamic Loading and Response of Footbridges, Canadian Journal of Civil Engineering, Vol. 15, pp. 335-347.
9 Shin K. and Hammond, J.K. (2008) Fundamentals of Signal Processing for Sound and Vibration Engineers, John Wiley & Sons Ltd., UK.
10 Smith, A.L., Hicks S.J., and Devine, P.J. (2009) Design of Floors for Vibration:A New Approach, Revised Edition, The Steel Construction Institute, UK.
11 Strogatz, S.H., Abrams, D.M., McRobie, A., Eckhardt, B., and Ott, E. (2005) Theoretical Mechanics: Crowd Synchrony on the Millenium Bridge, Nature, Vol. 438, pp. 43-44.   DOI
12 Young, P. (2001) Improved Floor Vibration Prediction Methodologies, Proceedings of Arup Vibration Seminar on Engineering for Structural Vibration - Current Developments in Research and Practice, Institution of Mechanical Engineers, London, UK.
13 Zivanovic, S., Pavic, A., and Reynolds, P. (2005) Vibration serviceability of footbridges under human-induced excitation: a literature review, Journal of Sound and Vibration, Vol. 279, No. 1-2, pp. 1-74.   DOI   ScienceOn