摘要
对结构高度为492 m的上海环球金融中心大楼顶部所测得的两个时间段的良态风速样本进行了分析,结果表明,湍流度随平均风速增大而减小;阵风系数随平均风速的增大开始有减小趋势,之后基本保持不变,随湍流度增大而增大;脉动风湍流积分尺度比日本建筑荷载的建议值小;两个时间段实测得到的阵风系数与湍流度之间的线性拟合结果较为接近;纵向、横向脉动风功率谱和Von-Karm an谱比较,在低频段略有偏差,而在高频段符合较好。
The well-behaved wind speed samples of two different time segments on the top of Shanghai World Financial Center(SWFC) with a height of 492m were analyzed.The results show that turbulence intensity decreases with the increase of mean speed,gust factor first increases and then keeps unchanged with the increase of mean speed while it consistently goes up with the increase of turbulence intensity.The turbulence integral scale is smaller than that of the AIJ recommendation.The linear fitting curves between gust factor and turbulence intensity are very close to each other.According to the comparison of longitudinal and lateral fluctuating wind power spectrum with Von-Karman spectrum,there is a slight deviation in low frequency band but a good fit in high frequency band.
出处
《振动与冲击》
EI
CSCD
北大核心
2009年第12期114-118,122,共6页
Journal of Vibration and Shock
基金
国家自然科学基金重大研究计划重点项目(90715040)
国家自然科学基金创新研究群体计划(50321803)
国家自然科学基金面上项目(50878159)联合资助
关键词
湍流度
阵风因子
湍流积分尺度
功率谱
turbulence intensity
gust factor
turbulence integral scale
power spectrum
