Influence Factors on Wind induced Fatigue Life of Steel Circular Antenna with Asymmetric Brace |
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| Authors: | WANG Qin hua and GU Ming |
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| Institution: | State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,P. R. China;Department of Civil Engineering,Shantou university,Shantou 515063,P. R. China;State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,P. R. China |
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| 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. |
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| Keywords: | structure with asymmetric wind induced fatigue life wind speed and direction joint distribution function surface roughness vortex induced resonance |
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