Tests for human-bridge vertically coupled vibration effects

WEN Jinlong1, WANG Zhihao1, KOU Chen1,2, HUO Hongyuan1

Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (9) : 26-31.

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (9) : 26-31.

Tests for human-bridge vertically coupled vibration effects

  • WEN Jinlong1, WANG Zhihao1, KOU Chen1,2, HUO Hongyuan1
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Abstract

For lightweight footbridge, there are evident vertical coupling effects among stationary occupants, waking pedestrians and the footbridge. To further clarify the vertical human-bridge interaction in this paper, the effects of a single standing occupant, a single walking pedestrian as well as both a single standing occupant and a single walking pedestrian on a simply supported steel-glass composite footbridge model were experimentally investigated, respectively. Results show that the presence of the standing occupant can reduce the natural frequency of the footbridge, while the presence of the pedestrian will increase the natural frequency of the system. The walking frequency of the pedestrian has little effect on the vertical natural frequency of the combined human-bridge system, while the relationship of the vertical natural frequency of the human-bridge system with respect to the walking frequency and harmonics of the pedestrian has substantial effect on the predominant frequency of the Fourier spectrum amplitude of the vertical acceleration of the bridge. When there are both standing and walking people on the footbridge, the acceleration of the footbridge at the position where the standing occupant occupies as the actual perceiver of footbridge vibration is significantly less than that of the standing occupant at its centroid. This paper can provide useful references for the vertical human-bridge interaction and vibration serviceability assessment.

Key words

Vertical human-bridge interaction / standing occupant / pedestrian / dynamic characteristics / vibration serviceability

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WEN Jinlong1, WANG Zhihao1, KOU Chen1,2, HUO Hongyuan1. Tests for human-bridge vertically coupled vibration effects[J]. Journal of Vibration and Shock, 2022, 41(9): 26-31

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