Measuring Coherency of Human-Induced Rhythmic Loads Using Force Plates
Publication: Journal of Structural Engineering
Volume 122, Issue 7
Abstract
This paper presents the results of an experimental study on measuring and quantifying the coherency of crowd-rhythmic movements. Two instrumented force plates were used to independently measure the load-time histories of sets of two volunteer subjects performing rhythmic movements. Subjects were asked to synchronize their motion to audible signals played at various frequencies. We observed that the coherency of motion varies as a function of the frequency of motion. In addition to auditory effect, the coherency is controlled by a visual effect (i.e, subjects synchronize their motion with respect to the musical beat and movements of one another). Statistics of the coherency of motion are presented for subjects standing in two different orientations, and a suitable type of probability-distribution function is suggested.
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References
1.
Allen, D. E.(1990). “Building vibrations from human activities.”Concrete Int., 12(6), 66–73.
2.
Ebrahimpour, A. (1987). “Modeling spectator induced dynamic loads,” PhD thesis, Univ. of Idaho, Moscow, Idaho.
3.
Ebrahimpour, A., and Sack, R. L.(1989). “Modeling dynamic occupant loads.”J. Struct. Engrg., ASCE, 115(6), 1476–1496.
4.
Greimann, L. F., and Klaiber, F. W.(1978). “Dynamic forces induced by spectators.” J. Struct. Div., ASCE, 104(2), 348–351.
5.
Ji, T., and Ellis, B. R. (1993). “Evaluation of dynamic effects for dance loads.”Proc., Int. Colloquium on Struct. Serviceability of Build., Int. Assoc. for Bridge and Struct. Engrg., Göteborg, Sweden, 165–172.
6.
Parzen, E. (1960). Modern probability theory and its applications . John Wiley and Sons, Inc., New York, N.Y.
7.
Pernica, G.(1983). “Dynamic live loads at a rock concert.”Can. J. Civ. Engrg., 10(2), 185–191.
8.
Rebelo, C., and Scherer, R. J. (1993). “Reduction factor for human loads in dancing halls.”Proc., Int. Colloquium on Struct. Serviceability of Build., Int. Assoc. for Bridge and Struct. Engrg., Göteborg, Sweden, 173–178.
9.
Tuan, C. Y., and Saul, W. E.(1985). “Loads due to spectator movements.”J. Struct. Engrg., ASCE, 111(2), 418–434.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 122 • Issue 7 • July 1996
Pages: 829 - 831
Copyright
Copyright © 1996 American Society of Civil Engineers.
History
Published online: Jul 1, 1996
Published in print: Jul 1996
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