Analysis of wind-induced fatigue of inclined cables
Li Chunxiang, Li Weiwei
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Department of Civil Engineering, Shanghai University, No. 149 Yan Chang Road,Shanghai 200072
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History+
Received
Revised
Published
2008-08-25
2008-10-30
2009-09-25
Issue Date
2009-09-25
Abstract
The main objective of the present paper is to analyze the wind-induced fatigue of inclined cables. Firstly, it is hypothesized that within the random stress cycle, the dispersion of between the maximum and minimum stress of the nodes contents with the Rayleigh distribution. Subsequently, the formula of fatigue reliability is formulated. Likewise, based on the fatigue objective reliability of bridge structures, the simple formulas for the estimation of fatigue life are then presented. Thirdly, on the basis of present researches, the influences of different wind attack angles are further assessed on both the fatigue reliability and fatigue life. Finally, taking the inclined cable in Songhuajiang Cable-stayed Bridge as an example, the time history stress and displacement of several positions in the cable at different wind attack angles, as well as the stress standard deviations, are calculated. With resorting to the stress and displacement under the most dangerous condition, the fatigue life is thus obtained so as to examine the wind-induced fatigue performance of the cable.
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