高层建筑动态风干扰的瞬态风压积分法研究

提出通过在风洞试验中多通道测量刚性模型表面瞬态风压并进行积分的方法研究高层建筑的动态风干扰。模型表面的瞬态风压利用多通道同步压力测量而得到。为提高数值积分精度,测压孔位置按高斯求积节点布置。设计了表面布置有测压孔的受扰高层建筑刚性模型和三种不同高度的干扰建筑模型,研究了相同高度以及不同高度的两个高层建筑之间的顺风向和横风向动态风干扰。借助干扰因子讨论了近邻建筑的位置、距离以及楼高对受扰建筑基础动态倾覆力矩的影响规律,并与传统方法所得结果作了比较。

Investigation to Dynamic Interference on High-Rise Buildings by Integral of Instantaneous Pressure

An alternative approach to investigate the wind-induced interference on buildings was presented via measuring and integrating instantaneous wind pressures distributed on the rigid model surface in wind tunnel.The instantaneous wind pressures on the model surface were obtained from the synchronous multi-channel pressure measurements,the pressure taps were arranged as the nodes of Gauss numerical integration to improve accuracy.A rigid model of a high-rise building with pressure taps distributed on the surface and three interference-building models with different heights were designed,the along-wind and across-wind interferences between two high-rise buildings with identical height and different heights were investigated.The effects of the arrangement,spacing and height of the adjacent building on the dynamic base overturning moment of the interfered building were discussed in terms of the interference factor, and compared with the results from the traditional approaches.