大跨径悬索桥空气动力稳定性的影响因素研究  

Influence of some factors on the aerodynamic stability of long-span suspension bridges

作　　者：张新军[1] 

机构地区：[1]浙江工业大学建筑工程学院,浙江杭州310032

出　　处：《浙江工业大学学报》2006年第1期8-10,共3页Journal of Zhejiang University of Technology

基　　金：浙江省自然科学基金资助项目(502118)

摘　　要：随着悬索桥跨径的增大,缆索直径以及作用在其上的风荷载、静风效应以及风速空间分布的非均匀性都将随之增强,对大跨径悬索桥的空气动力稳定性将可能带来不容忽视的影响.以润扬长江大桥为例,通过分析揭示了静风效应、风速空间分布的非均匀性以及缆索风荷载等因素对大跨径悬索桥空气动力稳定性的影响.结果表明:静风效应对大跨径悬索桥空气动力稳定性的影响比较重要,但是风速空间非均匀分布和缆索风荷载等因素对大跨径悬索桥的空气动力稳定性基本没有影响.With increasing span length of suspension bridges, the cable＇s diameter and also the wind load acting on it, the static wind action and the spatial non-uniformity of wind speed increase consequently, which may have an unnegligible influence on the aerodynamic stability of long-span suspension bridges. By taking Runyang Bridge over the Yangtze River as example, effects of some factors such as the static wind action, wind speed spatial non-uniformity, and the cable＇s wind load on the ,aerodynamic stability of the bridge are investigated analytically. The results show that the aerodynamic stability of long-span suspension bridges is significantly influenced by the static wind action, whereas the spatial non-uniformity of wind speed and the cable＇s wind load have basically no influence on it.

关 键 词：大跨径悬索桥 空气动力稳定性 静风效应 风速空间非均匀分布 缆索风荷载 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]