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随着悬索桥跨径的增大,缆索直径和作用在缆索上的风荷载都将相应增加,对悬索桥静风效应和动力风效应(主要是指空气动力稳定性)的影响将可能不容忽视。通过推导,建立了作用于缆索上风荷载的计算模型。以润扬长江大桥为背景,分析了缆索风荷载对悬索桥静风效应和空气动力稳定性的影响。结果表明:缆索风荷载对悬索桥静风效应的影响比较显著,但对于空气动力稳定性则没有影响。
With the increase of the span of suspension bridge, the diameter of the cable and the wind load acting on the cable will increase correspondingly, and the influence on the static wind effect and dynamic wind effect (mainly the aerodynamic stability) of the suspension bridge may not be neglected. Through the derivation, the calculation model of the wind load on the cable has been established. Taking Runyang Yangtze River Bridge as a background, the influence of cable wind load on static wind effect and aerodynamic stability of suspension bridge is analyzed. The results show that the effect of cable wind load on the static wind effect of suspension bridge is significant, but it has no effect on the aerodynamic stability.