缆索风荷载对悬索桥风效应的影响研究  

Research on Influence of Cable Wind Load on Wind Action of Suspension Bridges

作　　者：张新军[1] 张丹[1] 

机构地区：[1]浙江工业大学建筑工程学院,杭州市310014

出　　处：《公路》2005年第12期1-4,共4页Highway

摘　　要：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 an increase in span length of suspension bridges, the diameter of cables and the wind load acting on them increase consequently, which may has an unnegligible influence on the static and the dynamic wind action （mainly refers to the aerodynamic stability） of suspension bridges. In this paper, the model of wind load acting on the cables is established. By taking Runyang Bridge over the Yangtze River as example, influence of the cable wind load on the aerostatic effect and the aerodynamic stability of the bridge is analyzed. It is shown that the cable wind load affects remarkably the aerostatics of long-span suspension bridges, but its effect on the aerodynamic stability becomes negligible.

关 键 词：悬索桥 缆索风荷载 静风效应 空气动力稳定性 

分 类 号：U441[建筑科学—桥梁与隧道工程]