结构顺风向风振的规范表达式及有关问题的分析  

Expression Formula of Alongwind Vibration for Structures in Local Code and Relative Problems

作　　者：张相庭[1] 

机构地区：[1]同济大学,上海200092

出　　处：《建筑结构》2004年第7期33-35,21,共4页Building Structure

摘　　要：基于结构随机振动理论 ,可导出顺风向风振时各类风响应。对于响应以第 1振型为主的高耸结构等结构 ,常以先求风振系数再求各类风响应较为方便。风振系数国内外有不同的表达式。结合我国荷载规范风振系数表达式 ,可推出与Davenport风振系数完全相同的表达式 ,以及任何其他表达式。对在应用结构随机振动理论推导时常见的错误加以分析。展望了 2Based on random vibration theory,the along wind structural response formulae are derived.It is convenient to express the wind excited vibration of structures in term of gust response factor for tower structures and other tall structures taking only into consideration of first vibration mode.The expression formula of gust response factor may be different at home and abroad.The expression formula of gust response factor in China code may be exchanged into other expression formula of gust response factor such as that derived by A.G.Davenport or used by USA code.The common errors in using random vibration theory to wind engineering are pointed out.The development and change of code on wind in the 21th century due to rapid growth of computer technique are looked forward.

关 键 词：结构振动 随机振动理论 风振系数 计算机 

分 类 号：TU311.3[建筑科学—结构工程]