Human induced vibration comfort based on random walk model

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (9) : 226-233.

WU Gangjie1, CHEN Deyi1, HUANG Shiping2, LI Zhihai1

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Abstract

To study the effects of random loads on the vibration of pedestrian bridge structures, Firstly, a bi-directional random walking model was established and an analytical solution for the structural vibration response under random load was derived. Secondly, the influence of crowd density on the structural vibration response was compared and analyzed. Finally, by studying the correlation between the pedestrian's subjective sensation time and the total time, the comfort amplification factor was defined. Taking a pedestrian overpass in Jingzhou City as an example, the vibration comfort evaluation was conducted to verify the applicability of the bi-directional random walking model and the comfort amplification factor. The results show that the acceleration response of pedestrian bridge structure increases first and then decreases with the increase of crowd density. There is a significant correlation between the perceived time and the total time of pedestrians, and a corresponding relationship can be established according to the comfort amplification factor. The comfort amplification factor decreases with the increase of vibration response peak value, while it increases with the increase of crowd density. These results have reference significance for the quantitative calculation of pedestrian bridge vibration comfort.

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random walking model / vibration response / pedestrian bridge / comfort amplification factor

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WU Gangjie1, CHEN Deyi1, HUANG Shiping2, LI Zhihai1. Human induced vibration comfort based on random walk model[J]. Journal of Vibration and Shock, 2024, 43(9): 226-233

References

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