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Wind-driven rain on buildings: Accuracy of the ISO semi-empirical model
Journal of Wind Engineering and Industrial Aerodynamics ( IF 4.8 ) Pub Date : 2021-04-02 , DOI: 10.1016/j.jweia.2021.104606
Firouzeh Souri , Hua Ge , Ted Stathopoulos

Previous studies have shown that the accuracy of the ISO semi-empirical wind-driven rain (WDR) model can be improved by applying more detailed wall factors determined based on high-resolution field measurements. However, discrepancies between measurements and predictions still exist. The availability of high-resolution WDR field data collected over a long period of time makes a detailed analysis possible. Field measurements of WDR on two mid-rise and one high-rise buildings in three Canadian regions over a year and a half were analyzed. Two main factors that can significantly improve the ISO WDR model were identified, i.e. the time resolution (5 ​min data vs. hourly data) and the correction of difference in wind speed and wind direction between the building site and weather station using hourly data. It is recommended to take WDR measurements at shorter-duration and calculate wall factors using both shorter-duration records and hourly averaged data. In general, the ISO model works well if all the differences in wind conditions between site and the weather station can be taken into account. The observed discrepancy can be reduced to within 2% for façades facing the prevailing wind-direction, while to about 60% for façades off the prevailing wind direction in complex urban settings.



中文翻译:

建筑物上的风雨:ISO半经验模型的准确性

先前的研究表明,通过应用基于高分辨率现场测量确定的更详细的墙体系数,可以提高ISO半经验性风雨(WDR)模型的准确性。但是,测量和预测之间仍然存在差异。长时间收集的高分辨率WDR现场数据的可用性使详细分析成为可能。在一年半的时间里,对加拿大三个地区的两座中高层建筑和一幢高层建筑的WDR进行了现场测量。确定了可以显着改善ISO WDR模型的两个主要因素,即时间分辨率(5分钟数据与每小时数据)以及使用每小时数据校正建筑工地与气象站之间的风速和风向差异。建议以较短的时间进行WDR测量,并使用较短的时间记录和每小时平均数据来计算墙因子。通常,如果可以考虑站点和气象站之间的所有风况差异,则ISO模型可以很好地工作。在复杂的城市环境中,面向主要风向的立面的观察到的差异可以减小到2%以内,而偏离主要风向的立面的观察到的差异可以减小到约60%。

更新日期:2021-04-02
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