低矮房屋风场特性的现场实测及数值模拟

Field measurements and numerical simulations of wind characteristics of low-rise buildings

为了研究低矮房屋的风荷载特性及风压分布,对一四层办公楼的风场特性进行了现场实测.通过对2016年8月一次大风的实测,收集了相关数据,并进行了分析.数据分析得到了该实测房屋的风荷载特性及风压分布,同时与数值模拟结果进行对比.分析结果表明:实测房屋屋面风压以负压为主,其中角部区域负压最大,边缘部分与屋脊部分相对较小;屋面风压实测值角部区域相对于模拟值较大,而其他部分较模拟值比较偏小,但总体分布情况比较接近.

In order to study the wind characteristics and pressure distribution of low-rise buildings,the field measurements of the wind characteristics are conducted on the roof of a lowrise building.Based on the analysis of the wind characteristics data,the results are compared with those of the numerical wind tunnel.It is shown that negative wind pressure predominates the roof of low-rise buildings.The wind pressure on the corner of the roof is higher compared with those on the ridge and edge.The measured wind pressure coefficient of the corner area is higher and that of the other areas is lower compared with those obtained from the numerical wind tunnel but they possess a similar distribution trend.