国内外规范圆截面高耸结构横风向等效风荷载取值对比研究  

Comparative Research on Across Wind Equivalent Load of Towering Structure with Circular Section in Codes Abroad and Home

作　　者：梁枢果[1] 王磊[1] 王述良[1] 宋微微[1] 

机构地区：[1]武汉大学土木建筑工程学院,430072

出　　处：《特种结构》2013年第5期94-98,共5页Special Structures

基　　金：国家自然科学基金资助项目(No;51178359)

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,并结合一200m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栽规范方法亟待完善。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.

关 键 词：烟囱 横风向共振 等效风荷载 规范 

分 类 号：TU399[建筑科学—结构工程] TU312.1