Analysis of wind-induced fatigue damage of inclined cables

Li Chunxiang;Li Weiwei

Journal of Vibration and Shock ›› 2009, Vol. 28 ›› Issue (11) : 61-66.

PDF(5268 KB)
PDF(5268 KB)
Journal of Vibration and Shock ›› 2009, Vol. 28 ›› Issue (11) : 61-66.
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Analysis of wind-induced fatigue damage of inclined cables

  • Li Chunxiang, Li Weiwei
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Abstract

The main objective of the present paper is to analyze the wind-induced fatigue damage of inclined cables. Firstly, following the liner accumulated damage theory proposed by Miner, the computational formula of structural fatigue damage is suggested. Subsequently, according to the high-cycle fatigue damage properties, it is hypothesized that the fatigue damage of inclined cable obeys with the Basquin fatigue estimate model. Thirdly, on the basis of the present researches, the framework is proposed for the influences of different wind speeds and different wind attack angles on the fatigue damage of inclined cable. Finally, taking the inclined cable in Song Hua Jiang Cable-stayed Bridge as an example, the time history stress of several positions in the cable under different wind speeds and different wind attack angles is calculated and then, the stress-strain cycle history of the inclined cable is obtained by resorting to the rain flow digit method, thus examining the influences of different wind speeds and different wind attack angles on the fatigue damage of inclined cable.

Key words

Inclined cables / Fatigue damage / Miner liner accumulated damage theory / wind-induced vibration / Wind speeds / Wind attack angles / Dynamic time-history analysis

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Li Chunxiang;Li Weiwei. Analysis of wind-induced fatigue damage of inclined cables[J]. Journal of Vibration and Shock, 2009, 28(11): 61-66
PDF(5268 KB)

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