新荷载规范下高耸结构风振系数计算探讨  

Discussion about the Gust Effect Factor of High-rise Structure Based on the New Version of Chinese Load Code

作　　者：邓洪洲[1] 段成荫[1] 

机构地区：[1]同济大学建筑工程系,上海200092

出　　处：《特种结构》2013年第6期1-6,共6页Special Structures

摘　　要：由于新版建筑结构荷载规范对顺风向风振系数作出了较大修改,本文对高耸结构设计规范中的相应问题进行了研究。首先,总结了新荷载规范对顺风向风振系数的修改要点,比较了新的风振系数表达式与原表达式之间的异同,分析了新规范共振响应因子R、背景响应因子B_z与旧规范脉动增大系数ξ、脉动影响系数v之间的关系。其次,通过数值计算研究了新荷载规范下高耸结构风振系数相关参数取值所受到的影响。然后,探讨外形不规则的高耸结构风振系数的计算。最后,提出了与新荷载规范形式相协调的高耸结构风振系数表达式,编制了相应参数的计算表格,并通过实例计算和时程分析进行了验证。As the new version of Chinese ＂Load code for the design of building structures＂ has notable modifications of the wind load,some issues regarding the calculation of gust effect factor of high-rising structures are studied in this paper.Firstly,main points about the modification of the longitudinal wind load are summarized.Expressions of gust effect factor specified by new load code and ＂Code for design of highrising structures＂ are compared.The relationship between parameters in new expression such as resonance response factor R and background response factor B_Z,and parameters informer expression such as fluctuating amplification factor ζ and gust wind converting factor v are deduced.Then the values of these parameters are numerically investigated with respect to the influence of new code specifications.Thirdly,discussions about the calculation of gust effect factor of irregular high-rising structures are presented.Besides,expressions for gust effect factor of high-rising structures based on the new load code are proposed and relevant computation sheets are provided in this paper.

关 键 词：高耸结构 风荷载 风振系数 荷载规范 

分 类 号：TU312.1[建筑科学—结构工程]