遮挡条件下超高层建筑风洞试验研究

摘要

Based on synchronous pressure measurement, the wind tunnel test of a super high-rise structure is done under the sheltering conditions with and without considering the surrounding buildings. The shape factors are studied for reference of structural design. The results show that wind load distri-bution accords with the distribution rule of wind load of bluff structural surface when there is no buildings surrounded;the peak value of shape factor is smaller without surrounding buildings;and the overall shape factor obtained through the particular shape factor of each layer is smaller than the one regu-lated.%基于同步测压试验，对某超高层结构在考虑周边建筑与不考虑周边建筑两种遮挡条件进行风洞试验，研究其体型系数，并以此作为结构设计的参考。结果表明：无周边建筑时，风荷载分布符合钝体结构表面风荷载分布规律；有周边建筑时，结构表面局部体型系数正峰值与无周边建筑干扰时相比普遍略小；通过各层局部体型系数积分得到的整体体系系数比规范规定的略小。