摘要
以某一高492m、具有特殊体型的超高层建筑为工程背景,研究超高层建筑层风力规格化功率谱曲线的特点并给出其数学函数模型。首先,在同济大学TJ-2边界层风洞中对该超高层建筑进行刚性模型分组同步测压风洞试验,得到各测点层的风力系数时程,并对各层风力系数的频谱特性进行分析,归纳出各层风力规格化功率谱曲线沿高度变化的特点;然后,根据试验所得的功率谱曲线的特点,给出顺风向、横风向和扭转风向的层风力规格化功率谱数学函数表达式,用该数学模型对各层风力功率谱曲线进行拟合的效果非常理想,同时,对各层风力功率谱函数的拟合参数进行归纳总结,得到统一的参数结果。研究结果表明层风力功率谱函数是有效的。
The characteristics and mathematical model of normalized wind load power spectrum of super-tall buildings are studied with a specially shaped 492m super-tall building. Rigid model synchronization pressure test of the super-tall building is carried out in a TJ-2 atmospheric boundary layer wind tunnel. The time-history of wind pressure coefficients are obtained and their frequency characteristics analyzed. The features of normalized power spectrum of wind pressure coefficients varying along the vertical direction of the model are summarized. The mathematical formula of wind load normalized power spectrum along-wind, across-wind and torsional-wind are proposed according to the characteristics of the power spectrum curves from the experiments. The fitted parameters of the wind load power spectrum function are summarized and the unified parameters are obtained.
出处
《土木工程学报》
EI
CSCD
北大核心
2009年第11期31-40,共10页
China Civil Engineering Journal
基金
上海市教育委员会曙光计划(04SG23)
上海市科学技术委员会交叉领域创新团队培养计划(03DZ12039)
关键词
超高层建筑
刚性模型同步测压试验
层风力规格化功率谱函数
参数拟合
super-tall building
rigid model synchronization pressure test
wind load normalized power spectrum function
parameters fitted
