摘要
大跨度空间结构是典型的风敏感结构,其风场和风压具有强随机性和时空分布特性,因此有必要开展全面、系统的结构风场和风压同步实测研究。基于北京大兴国际机场航站楼的风速和风压实测数据,开展航站楼屋面风场和风压特性研究,分析航站楼屋面不同位置处的风场特性以及不同风场特性之间的关系,结合实测风场特性研究航站楼屋面风压的时空分布规律和非高斯特性,并对比分析脉动风压功率谱密度和脉动风速功率谱密度。结果表明:航站楼屋面不同位置处风场特性存在较大差异,平均风速与湍流强度及阵风因子呈负相关,湍流强度与阵风因子呈正相关;屋面风压在易产生特征湍流的迎风边缘和连廊位置具有复杂的时空分布特性,屋面大部分区域风压为偏度小于0和峰度大于3的非高斯分布,脉动风压功率谱密度和脉动风速功率谱密度受屋面特征湍流影响显著。
Large-span spatial structures are typical wind-sensitive structures,and their wind field and wind pressure have strong randomness and spatiotemporal distribution characteristics.Therefore,it is necessary to conduct a comprehensive and systematic study on synchronous measurements of structural wind field and wind pressure characteristics of such structures.Based on the wind speed and wind pressure measurement data of Beijing Daxing International Airport terminal,the wind field and wind pressure characteristics of the terminal roof were studied in this paper,involving the wind field characteristics at different positions of the roof and the relationship between different wind field characteristics.Combining the measured wind field characteristics,the spatiotemporal distribution and non-Gaussian characteristics of wind pressure on the roof were investigated,and the power spectral densities of fluctuating wind speeds and fluctuating wind pressures were compared.The results indicate that there are significant differences in wind field characteristics at different locations on the roof.The mean wind speed is negatively correlated with the turbulence intensity and gust factor,while the turbulence intensity is positively correlated with gust factor.The wind pressure on the roof exhibits complex spatiotemporal distribution characteristics at windward edges and corridor locations where characteristic turbulence is likely to occur.The wind pressure on the majority of the roof area exhibits a non-Gaussian distribution with skewness less than 0 and kurtosis greater than 3,and the power spectral densities of fluctuating wind pressures and fluctuating wind speeds are significantly influenced by the roof characteristic turbulence.
作者
万华平
胡鹏华
刘玄
张文杰
秦凯
罗尧治
WAN Huaping;HU Penghua;LIU Xuan;ZHANG Wenjie;QIN Kai;LUO Yaozhi(College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China;Beijing Institute of Architectural Design,Beijing 100045,China)
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2024年第7期120-130,共11页
Journal of Building Structures
基金
浙江省重点研发计划(2021C03154)
浙江省自然科学基金项目(LR23E080003)。
关键词
北京大兴国际机场
现场实测
风场特性
风压分布
非高斯特性
Beijing Daxing International Airport
field measurement
wind field characteristic
wind pressure distribution
non-Gaussian characteristic
