摘要
肋条是仿古悬挑屋盖最常用的建筑装饰。以APEC2014峰会主会场雁栖湖会展中心为例,采用测压风洞试验的方法,讨论了肋条对该类仿古悬挑屋盖风荷载的影响。结果表明:在屋盖前缘分离区,肋条对特征湍流影响较小,但能够加速特征湍流在能量传输过程中的衰减,对后缘再附区风荷载有一定影响;肋条对仿古悬挑屋盖主体结构抗风设计起控制作用的径向条带弯矩系数均值影响很小,但对其根方差有一定影响,肋条减小了条带承受脉动风荷载的极值;对屋盖围护结构抗风设计起控制作用的极值风吸力而言,不设置肋条光滑表面的极值风荷载特征值与肋条上基本相同。
Ribs are the important symbol for archaize cantilever roof. Selecting APEC 2014 Summit Main Venue--Yanqihu Center as an example, high-Frequency-Pressure-Integration tests are performed in a wind tunnel, in order to investigate effects of ribs on wind load of archaize cantilever roof. Analytical results show that wind separates on the edge of the roof and signature turbulence is formed subsequently on the upstream area, which seems to have little influence on the ribs. While ribs accelerate the decay of signature turbulence and affect the wind load on downstream reattachment area to some extent. In terms of bending moment coefficient, it can be used to evaluate wind load acting on main frame structure of cantilevered roof. In addition, ribs on the roof do not change the peak value of the mean RSM in the test. With regarding to the extreme suck pressure, the same to these without ribs. bending moment coefficient, but decrease the peak value of the the extreme wind load characteristic values with ribs are almost
出处
《振动工程学报》
EI
CSCD
北大核心
2016年第2期269-275,共7页
Journal of Vibration Engineering
基金
国家自然科学基金资助项目(51378060
51338001)
高等学校学科创新引智计划资助(B13003)
关键词
仿古悬挑屋盖
风洞试验
风荷载
主体结构
弯矩系数
archaize cantilever roof
wind tunnel test
wind load
main frame structure
bending moment coefficient
