加设挡风板对大跨悬挑屋盖气动性能的影响  

The influence of wind deflector on the aerodynamic characteristics of large-span cantilevered roof

作　　者：张建胜[1] 毛建飞 卢成原[1] 周锋[1] 

机构地区：[1]浙江工业大学建筑工程学院,浙江杭州310014

出　　处：《浙江工业大学学报》2014年第4期373-377,共5页Journal of Zhejiang University of Technology

基　　金：国家自然科学基金青年项目(51108418);教育部科学技术研究重点项目(212068)

摘　　要：基于CFD技术,采用SSTk-ω模型对大跨悬挑屋盖进行了风压分布和风环境的数值模拟.分析了各风向角下屋盖表面的风荷载分布特性,得到了屋盖的最不利风向角为0°风向角.在此基础上,分析了在该最不利风向角下,大跨悬挑屋盖前缘加设挡风板对结构气动性能的影响.结果表明,在悬挑屋盖前缘加设挡风板可有效降低屋盖悬挑部分的风压,并改善了屋盖结构的受力性能,是一种切实可行的气动优化措施.Based on computational fluid dynamics,SST k-ωturbulence model was used to simulate the wind pressure and the wind environment on the large-span cantilevered roof.The distribution feature of the wind load on the surface of the roof was analyzed under different wind angles.The result shows that the angle of 0degree is the most unfavorable wind angle.According to this,the influence of adding wind deflector in front of the large-span cantilevered roof on the aerodynamic performance was analyzed under the most unfavorable wind direction angle.The results show that adding wind deflector can effectively reduce the wind pressure on the cantilevered roof and improve the aerodynamic performance of roof structure.It is a kind of feasible aerodynamic optimization measure.

关 键 词：挡风板 悬挑屋盖 数值模拟 气动优化 

分 类 号：TU312.1[建筑科学—结构工程]