A study on pedestrian level wind environment and wind-resistance performances of a steel truss footbridge

CHEN Yiyong1, CAO Zhang1,2, LIU Zhiwen1, ZHANG Yunquan2,XIE Puren1

Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (16) : 274-280.

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PDF(1828 KB)
Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (16) : 274-280.

A study on pedestrian level wind environment and wind-resistance performances of a steel truss footbridge

  • CHEN Yiyong1, CAO Zhang1,2, LIU Zhiwen1, ZHANG Yunquan2,XIE Puren1
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Abstract

Based on a steel truss footbridge under construction, numerical simulations of aerodynamic coefficients and pedestrian level wind environment on bridge deck of the steel truss section were conducted firstly using computational fluid dynamics (CFD). Finally, the aerodynamic coefficients, vortex-induced vibrations, and flutter instability of the steel truss footbridge were investigated with wind tunnel tests. The research results show that the cultural wall inside the steel truss has great effects on the pedestrian level wind environment on the bottom bridge deck. Appropriate increase of the gaps between the cultural wall and the bottom and top chords of the truss can effectively improve the pedestrian level wind environment on the bottom bridge deck. The aerodynamic coefficients of the steel truss with asymmetry section under the wind blows from left side are obviously different from that of the bridge deck under the wind blows from the right side. There is obvious vortex-excited resonance of the steel truss footbridge with asymmetry section. The amplitudes of the vortex-excited resonance of the steel truss footbridge can be effectively reduced with tuned mass dampers (TMD).

Key words

 steel truss footbridge / pedestrian level wind environment / wind-resistance performance / computational fluid dynamics (CFD) / wind tunnel tests

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CHEN Yiyong1, CAO Zhang1,2, LIU Zhiwen1, ZHANG Yunquan2,XIE Puren1. A study on pedestrian level wind environment and wind-resistance performances of a steel truss footbridge[J]. Journal of Vibration and Shock, 2019, 38(16): 274-280

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