Influence Factors on Wind induced Fatigue Life of Steel Circular Antenna with Asymmetric Brace
WANG Qin hua and GU Ming
DOI:10.11835/j.issn.1674-4764.2010.04.005
Received December 27, 2009,Revised , Accepted , Available online July 01, 2015
Volume ,2010,Pages 19-25
- Abstract
Wind induced responses of a single steel circular antenna with an asymmetric brace were computed considering wind speed and direction joint distribution function at location of the structure, and then wind induced fatigue life of the structure was estimated in frequency domain and time domain, respectively. Some parameters, including wind direction, surface roughness, vortex induced resonance and mean wind speed, which would have effects on the wind induced fatigue life of the structure,were discussed. It is found that 1) wind direction has great effects on wind induced fatigue damage, that is, significant fatigue can occur in wind direction of high probability; 2) the more roughness the surface of structure is, the shorter the wind induced fatigue life is; 3) the effects of vortex resonance on wind induced fatigue life should not be neglected; 4) the mean velocity has slight impact on the wind induced fatigue life of the structure.