椭园形双曲抛物面鞍形壳体屋面风压分布系数的实验研究

本文通过模型风洞实验,对椭园形双曲抛物面鞍形壳体屋面的风压分布系数进行了研究。实验是在模拟大气边界层风洞中进行的。根据不同风向作用下屋面风压的实测分布规律,给出了最大风压系数和整个屋面的平均风压系数。在所研究的矢跨比范围内,最大风压系数C_(pm)=-206q,最大平均风压系数(绝对值)(?)_p=-0.82q(q为速压)。实验结果表明,风向对屋面风压分布起着最为重要的作用。

Wind Pressure Distribution on H. P.-Shaped Shell Roofs with Ellipse Plan

In this paper, wind pressure distrbution was investigated on the hyperbolic parboloid (H. P.) shaped shell roofs with ellipse plan by model test in the wind tunnel. The cotours of wind pressure on shell roofs were determined for various wind directios. The average suction of the roofs was computed. The effects of sag to span ration on the pressure distribution were studied by a series of models. It was concluded that the wind direction was the most important factor that affects the wind pressure distribution on the shell roofs.