中文摘要：

圆截面高耸结构（烟囱）因涡激共振而发生破坏或损坏的例子屡见不鲜，显示现存各种荷载规范对圆截面高耸结构横风向设计荷载考虑不足。本文简要介绍了中国、日本、加拿大、欧洲等四种规范关于圆截面高耸结构横风向等效风荷载的计算方法，并结合-200m的高烟囱实例分析了四种规范计算结果的差异。研究表明，比较四种规范，中国规范偏不安全，我国圆截面高耸结构横风向涡振等效风荷载规范方法亟待完善。

英文摘要：

Extensive high-rise structures with circular cross-section （chimney） were destroyed or damaged by vortex induced resonance, which indicates that the various existing load codes have not sufficient considerations for across-wind design loads of high-rise structures with circular cross section. The calculation methods of four national codes, namely China, Japan, Canada and Europe codes, for across-wind equivalent loads of high-rise structures with circular cross sections were briefly introduced, and the differences of calculated results among the four load codes were analyzed for a pracactical chimney with 200 meters high. This investigation shows that China＇s code seriously underestimates the equivalent wind loads of high-rise structures with circular cross section in across-wind direction in the above mentioned four codes, and a more perfect calculation method in China＇s code for vortex induced equivalent load of high-rise structure with circular cross section is extremely needed.