Cantilevered roof is particularly vulnerable to wind because high suction loads often occur on the rooftop due to flow separation. However, wind load characteristics associated with cantilevered roof have not been fully understood. In this paper, a 1/100 scale model of a cantilevered roof, over a grandstand, has been tested in a turbulent boundary layer flow, with particular emphasis on characterizing the wind pressure distribution on the cantilevered roof, and assessing the performance of several aerodynamic optimization devices. The results indicate that large wind suction generally occurs near the windward edge on rooftop surface. The effect of approaching wind direction is evident, which can influence the distribution pattern and value of wind pressure. For the effect of roof inclination, the down-sloping roof is found to be more appropriate since it results in most significant reduction in mean wind pressure, as well as the net lifting and bending moment coefficients. Furthermore, it is shown that adding a vented leading edge slot can effectively reduce the rooftop wind suctions. The maximum reduction in mean and peak suction loads is respectively 30% and 45%.

悬臂式屋顶特别容易受到风的影响，因为由于气流分离，屋顶上经常会出现高吸力。然而，与悬臂式屋顶相关的风荷载特性尚未完全了解。在本文中，一个 1/100 比例的悬臂屋顶模型，在看台上，在湍流边界层流中进行了测试，特别强调了悬臂屋顶上风压分布的特征，并评估了几种空气动力学性能。优化设备。结果表明，大风吸力一般发生在屋顶表面的迎风边缘附近。接近风向的影响明显，会影响风压的分布格局和值。对于屋顶倾斜的影响，发现下坡屋顶更合适，因为它导致平均风压以及净升力和弯矩系数的最显着降低。此外，结果表明，增加一个通风的前缘槽可以有效地减少屋顶风吸力。平均和峰值吸入载荷的最大降低分别为 30% 和 45%。