建筑结构风雨场特性的试验研究

考虑降雨对建筑结构风致作用的影响,首要问题是掌握结构在风雨联合作用下的风雨场特性。本文通过在大气边界层风洞洞体中内置降雨系统,建立风雨联合作用系统,并搭建风雨场信息采集系统,在不同风速和雨强组合下进行风雨联合作用试验,采集并分析风雨场的风特性。结果表明:随雨强的增大平均风速、湍流强度表现为先增大后减小,顺风向脉动功率呈下降趋势,且波动幅度增大。

EXPERIMENTAL RESEARCH OF CHARACTERISTICS OF FIELD ENVIRONMENT OF WIND AND RAIN INDUCED EFFECT ON STRUCTURE

To consider the role of rainfall on wind-induced effects of the structural, the primary issue is to master the field characteristic of wind and rain of structure under the combined effect of wind and rain. By wind tunnel test systems and precipitation systems, the paper performs an experiment research under different wind speed and rainfall intensity combined and analyzes the change of flow characteristic under the combined effect of the wind and rain. The experimental result shows that the average wind speed and turbulence intensity increase and then decreases with the rainfall intensity increasing,furthermore fluctuating wind power has the downward trend and the wave amplitude increases with the rain intensity.