论文部分内容阅读
利用刚性模型的同步测压风洞试验,研究了矩形截面超高层建筑脉动扭矩的基本特征。研究内容包括扭矩系数的根方差、功率谱密度、竖向相关性以及横风向脉动风力-扭矩相干函数,另外还考察了厚宽比和风场类别这两个参数对脉动扭矩的影响。研究结果表明,脉动扭矩系数随高度增加递减,随厚宽比增加而增加;脉动扭矩谱具有两个谱峰,谱峰形状随厚宽比改变发生很大变化;相对横风向风力,扭矩的竖向相关系数随距离衰减更快;脉动扭矩与横风向风力具有较强的相关性。
In this paper, the basic characteristics of pulsating torque of rectangular section super high-rise buildings are studied by using the synchronous model wind tunnel test. The study includes the root variance of torque coefficient, power spectral density, vertical correlation and transverse wind pulsating wind-torque coherence function. The effects of thickness-width ratio and wind field on the pulsating torque were also investigated. The results show that the pulsating torque coefficient decreases with increasing height and increases with the increase of aspect ratio. There are two peaks in the pulsating torque spectrum, and the shape of the peak varies greatly with the aspect ratio. The relative transverse wind direction To the correlation coefficient decay faster with distance; pulsating torque and wind crosswind has a strong correlation.