风沙对低矮建筑整体受力影响的风洞试验研究

通过风洞测力试验，研究了不同沙浓度和风速条件下风沙对低矮建筑整体受力的影响。研究结果表明:和净风工况相比，风沙对低矮建筑整体受力有着较大影响。风沙对低矮建筑平均基底剪力系数有着明显的增大作用，且沙浓度越大，增大的越明显。而对于脉动基底剪力系数的影响，除了与沙浓度有关之外，还与指示风速有关。当风速较小时，风沙增大了试验房的脉动效应，而当风速较大时，风沙减小了试验房的脉动效应。

Wind tunnel test for impact of wind-sand flow on overall forces of low-rise building

In this work, the wind tunnel tests were carried out to study the influence of wind-sand flow with different sand concentration and wind speed on the overall force of low-rise buildings. Test results show that compared with wind conditions without carrying sediment, wind-sand flow has a significant influence on the overall force of low-rise buildings. There is an apparent increase of the mean basal shear coefficient of low-rise buildings due to the occurrence of the wind-sand flow, while the higher sand concentration is, the more apparent the enlargement effect is. However, it is worth noting that the fluctuating basal shear coefficient is not only related to sand concentration, but it is also related to the indicative wind speed. It can be seen that when wind speed is small, the fluctuating effect of test model may be increased due to the occurrence of wind-sand flow, while when wind speed is high, the fluctuating effect may be decreased correspondingly. Keywords: wind-sand flow; low-rise building; force measurement tests; shear coefficient