摘要
通过刚体模型测压试验对某一492m高、具有特殊体型的超高层建筑的层风力空间相干函数的特点进行研究,并给出其数学函数模型。首先,利用压力积分技术获得各测量层的风力系数时程;然后,对顺风向、横风向和扭转方向的各层风力系数的相干函数曲线进行分析,阐明不同位置、不同间距的两层风力相干性特点,由此,给出超高层建筑层风力空间相干函数的拟合公式;最后,对顺风向、横风向和扭转方向的典型层间的风力相干函数的试验结果进行最小二乘拟合,确定了各拟合参数的值,并根据参数值随不同位置、不同间距的变化特点,归纳出统一的参数表达式。
The characteristics of spatial correlation functions of wind loads on a 492m tall building of a special shape are studied via a rigid model wind tunnel test for pressure measurement,and a mathematical model is presented.Firstly,the time-histories of wind force coefficients are obtained using pressure integral technique.Then,the measured spatial correlation function curves of wind force coefficients in the across-wind,along-wind and torsional directions are analyzed and their variation features with different locations and different spacing are summarized.Mathematical formulas are proposed for fitting wind force spatial correlation functions.Finally,the measured spatial correlation functions of wind force coefficients in the across-wind,along-wind and torsional directions are fitted by using the least square method,and the fitting parameters,varying with different locations and different spacing,are induced to obtain unified parameter expressions.
出处
《土木工程学报》
EI
CSCD
北大核心
2010年第9期32-39,共8页
China Civil Engineering Journal
基金
上海市教育委员会曙光计划(04SG23)
中南大学自由探索计划(201012200035)
中国博士后科学基金(20100471227)
关键词
超高层建筑
刚性模型测压试验
空间相干函数
参数拟合
super-tall building
rigid model test of pressure measurement
spatial correlation function
parameter fitting
