风场和周边干扰对高层建筑峰值风压的影响

通过风洞测压实验,研究了风场类型及周边干扰对高层建筑峰值风压的影响.研究结果表明:风场类型对高层建筑峰值风压有着较大影响,当高层建筑周边环境不变(有或者无周边干扰)时,绝大多数情况下,不同场地类别的峰值风压系数由大到小依次是B类,C类,D类.周边干扰对高层建筑峰值风压的影响不仅与周边建筑的相对位置有关,还与高层建筑当时所处的风场类型有关,如当南立面为迎风面时,干扰建筑E,F位于南立面斜前方,表现为遮挡效应,绝大多数测点的峰值风压系数均减小,B类场地时其最大减小幅度可达43%,C类场地时可达37%,D类场地时可达46%.

Influence of Terrain Categories and Surrounding Interference on the Peak Pressure of High-rise Buildings

Based on the pressure measurement tests of wind tunnel experiments, this paper discussed the impacts of different types of terrain and surrounding interference for peak wind pressure on the high-rise buildings. The results show that different types of terrain have a great impact on the peak pressures of high-rise buildings. When the surrounding environment of high-rise buildings remains unchanged, the peak pressure coefficients of different types of terrain are followed by B, C and D from large to small in most cases. The peak pressure impact of high-rise buildings is not only related to the relative position of the surrounding buildings, but also to the type of terrain a high-rise building at the time. For example, if the south facade is the wind surface and interfers buildings E and F located diagonally in front of the south facade, it performs a shielding effect. In this case, the vast majority of the peak pressure coefficients obtained in the terrain category of B, C and D are reduced differently in the vast majority of test points with a maximum decrease of 43%, 37% and 46% respectively.