某大跨平屋盖表面风荷载特性研究  

Research on wind load on a large-span plane roof

作　　者：秦乐[1] 田玉基[1] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044

出　　处：《建筑结构》2012年第2期160-164,共5页Building Structure

基　　金：国家自然科学基金"大跨屋盖结构的风致关键效应与动力灾变行为"(90815021)

摘　　要：通过风洞模拟试验,研究了在锥形涡诱导下大跨平屋盖表面风荷载的特性。给出了风向角、风速、屋盖厚度、场地条件对风荷载的影响,进而分析了产生这样结果的原因和流动机理,并把斜度和峰态作为区分高斯区和非高斯区的标准。另外采用功率谱从频域角度对风荷载进行分析。By means of wind tunnel simulation,the wind loading on the roof of large-span plane roof induced by conical vortex was investigated.The pressure distributions on the roof of the model were obtained under different wind direction,wind speed,thickness of the roof,surface roughness,and the mechanism of the flow was analyzed,using skew and kurtosis as a distinction between Gaussian and non-Gaussian zone district standards.The power spectrum was applied to analyze wind distribution from the view of frequency domain.

关 键 词：大跨屋盖 锥形涡 风荷载 非高斯 功率谱 

分 类 号：TU351[建筑科学—结构工程]