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IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century


IASS Symposium 2016

SESSION: Extreme Loads & Disasters

Aero-elastic Wind Tunnel Test of a High Lighting Pole

< Table of Contents for Extreme Loads & Disasters
  • Proceedings Name: IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century
  • ISSN: (Electronic Version) 2518-6582
  • Session: Extreme Loads & Disasters
  • Pages: 10
  • Title: Aero-elastic Wind Tunnel Test of a High Lighting Pole
  • Author(s): Yaozhi Luo, Yucheng Wang, Jiming Xie
  • Keywords: high lighting pole, aero-elastic model, wind tunnel experiment, high-rise structure, aerodynamic damping ratios
Abstract
The vortex excited resonance and wind-induced dynamic instability phenomenon of high lighting pole under strong wind is very concerned during structure design. A 1:25 multi-freedom aero-elastic model was designed for a high lighting pole in Zhoushan. In order to validate the similarity characteristic of the model, free vibration test was proceeded and the results were further processed. "Beat" phenomenon was eliminated and damp ratio of the model is 0.0032. According to the formal experiment result, the major along-wind fluctuation respond was 1st vibration component under designed wind speed. By analyzing the power spectrum of the base shear response, it was found that 2nd vortex-excited resonance exists under some wind directions. The aerodynamic damping ratio was calculated by random decrement technique and vibration test and the result showed that aerodynamic damping ratios are all positive under different wind speed, which demonstrated that the wind-induced instability will not occur.

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