摘要
采用上、下表面同步测压技术,对环拱形大跨度屋盖进行风洞试验研究;基于数值模拟技术,对开孔后大跨度屋盖进行风荷载的对比分析。结果表明:此类型屋盖内檐受负体型系数影响,最大达到-1.02,外檐受正体型系数影响,最大达到1.47;开孔可使得风敏感区的风压明显降低,最高使内檐降低9%,外檐降低21%;孔洞可使得屋盖上、下表面气流贯通,抑制高负压区锥形涡的形成,使结构变得安全。
The research on wind tunnel experiment of ring-arched large-span roof is conducted by using upper and lower surface simultaneous pressure measurement technology.Based on the numerical simulation technology,the wind load on large-span roof after opening is compared and analyzed.The results show that the inner eave of this type of roof is affected by the negative body shape coefficient,whose maximum reaches-1.02,and the outer eave is affected by the positive body shape coefficient,whose maximum reaches 1.47.The opening can significantly reduce the wind pressure in the wind-sensitive area,reducing the inner eave by 9%and the outer eave by 21%.The opening can make the air flow through the upper and lower surfaces of the roof,and it can suppress the formation of conical vortices in high negative pressure areas to make the structure safe.
作者
瞿伟
张敏
王瑞琦
Qu Wei;Zhang Min;Wang Ruiqi(School of Civil and Architectural Engineering,Guilin University of Technology,Guilin 541004,Guangxi;Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering,Guilin University of Technology,Guilin 541004,Guangxi;Guangxi Polytechnic of Construction,Nanning 530000,Guangxi)
出处
《工程建设》
2020年第9期6-10,29,共6页
Engineering Construction
基金
国家自然科学基金资助项目(51568016)
广西高校中青年教师基础能力提升项目(2017KY1363)。
关键词
大跨度屋盖
风洞试验
开孔
风荷载
large-span roof
wind tunnel experiment
opening
wind load
