新、旧《建筑结构荷载规范》中高层建筑风荷载的对比研究  

COMPARATIVE STUDY ON WIND LOADS OF HIGH-RISE BUILDINGS BETWEEN NEW AND OLD LOAD CODES FOR THE DESIGN OF BUILDING STRUCTURES

作　　者：李永贵[1] 高阳[1] 戴益民[1] 

机构地区：[1]湖南科技大学土木工程学院,湖南湘潭411201

出　　处：《钢结构》2015年第9期59-62,共4页Steel Construction

基　　金：湖南省自然科学基金项目(14JJ6026);湖南省教育厅开放基金项目(15K044;13K088);广西防灾减灾与结构安全重点实验室开放课题(2013ZDK 06)

摘　　要：风荷载是新规范修订的主要内容之一,列出了对高层建筑风荷载有影响的计算公式和参数。数值算例结果表明：与旧规范相比,新规范高层建筑顺风向平均风荷载减小,但风振系数增大,A、B类地貌,基底剪力分别增大3.4%-5.2%、3.6%-8.0%,高度达到400m时,C类地貌基底剪力基本持平,D类地貌基底剪力减小4.7%。考虑风荷载组合工况,A—C类地貌,新规范基底总剪力比旧规范顺风向基底剪力增大,D类地貌在建筑高度为105-260m时总剪力减小,最大减小值为旧规范计算值的2.9%。Wind load is one of the main contents of the revision of new China load code.Formulas and parameters which may have effects on wind loads on high-rise buildings were listed in this paper.Compared with the old China load code,the results of the numerical example showed that the mean of along wind load on high-rise building decreased with the increase of wind vibration factor.Base shear had increased by 3.4% -5.2% in the exposure category A and 3.6% -8.0% in the exposure category B respectively.Base shear of high-rise building with a height of 400 meters was almost the same in the exposure category C,and which had decreased by 4.7% in the exposure category D.Considering the wind load combinations in the new China load code,the total base shear had increased in the exposure category A—C.However,the total base shear of highrise building with a height of 105-260 meters had decreased in the exposure category D,and the largest reduction value was about 2.9%.

关 键 词：高层建筑 风荷载 荷载规范 风振系数 等效静力风荷载 

分 类 号：TU973.213[建筑科学—结构工程]