相邻高层建筑表面风压的数值模拟

Numerical simulation of wind pressures on adjacent tall buildings

采用数值模拟方法对一幢由主楼和配楼组成的复杂高层建筑的表面风压进行了模拟计算,考虑了相邻一幢高层建筑对风压分布的影响。计算得到的风压值还与风洞试验值作了比较。结果表明,数值模拟较好地反映了复杂高层建筑的周围流线和表面风压的分布情况;同时,由于相邻建筑物的存在,使得原有建筑的时均流线分布尤其是涡流的数目和尺度以及建筑表面的时均风压分布均发生了较明显的改变。

Wind pressures on the surface of a tall-building complex, which is composed of main and secondary towers, are predicted by using the numerical simulation technique. The effect of a neighboring tall building on the wind pressure distribution is considered. The predicted wind pressures are compared with the wind tunnel test results. It indicates that the numerical simulation well predicts the time-averaged streamline and wind pressure distributions. With the existence of the neighboring building the streamline distribution especially the number and scale of the vortices, and the pressure distribution are changed significantly.