Influence of Slot on the Wind Load for Large Span Cantilevered Flat Roof
开槽对大跨悬挑平屋盖结构风荷载的影响

Based on the wind tunnel tests for large span cantilevered flat roof, the distributing characteristics of mean local shape factor and extreme local shape factor of the roof are studied. It has been found that the force of strong wind can cause the eaves and the corners of the roof to be destroyed by higher negative pressures. And according to the wind load distribution characteristics of the roof, an aerodynamic wind-resistant measure of making slots in these locations is proposed. The influence of slot on wind load of large span cantilevered flat roof are investigated. The experimental results show that the proposed method can make a reduction of 50% for mean local shape factor and 25% for extreme local shape factor in the wind-sensitive locations of the roof.