屋盖围护结构设计风荷载取值探讨

Discussions on the wind load calculation of roof enclosure structures

机场航站楼、体育场馆等屋盖金属围护结构在强风天气下遭破坏的情况屡见不鲜,应从结构设计角度引起重视。结合两个工程风洞试验的结果并对照现行国家及行业协会规范、规程的相关规定,得出屋盖围护结构风荷载分布的一般性规律,指出在某些情况下风荷载局部体型系数按规范或规程选取偏于不安全。对屋盖围护结构局部体型系数的取值提出一般性建议。

The damage of metal roof enclosure structure for airport buildings and gymnasium stadiums under extremely windy weather should be paid enough attention to in perspective of structural design. Combined with two wind tunnel test results of two real projects,some common rules on the wind load distribution of roof enclosure structure were acquired,considering the relative terms in the Chinese design codes or regulations. Results show that under some conditions,wind load local shape coefficients are unsafe according to codes or regulations. A general suggestion was proposed for the wind load local shape coefficient of roof enclosure structure.