【摘要】 以某航站楼为例,结合平屋面分析复杂体型的屋面对风压分布的影响;结合规范值探讨幕墙外表面的附着物和周围建筑对其体型系数的影响。得出的主要结论:屋面受风最不利的位置在由柱状涡或锥形涡控制的迎风区域;屋面形状对风压影响很大,凸出部分负风压较大,凹进部分负风压很小;悬挑屋面在迎风时产生“上吸下顶”的叠加作用,其他风向为“上吸下吸”的抵消作用;幕墙外表面的附着物和周围U形排列的房屋都会增加幕墙的正风压。更多还原

【Abstract】 This paper studies the general characteristics of wind pressure distribution on the roof and curtain wall of long-span buildings with complex shape,through the analysis of a terminal building.The influence of the irregular shape of the roof on wind pressure is analyzed by a comparative study with a flat roof.The wind pressure on the curtain wall is also investigated by comparing with those in the codes.Several conclusions can be made as follows.The most dangerous part of the roof under wind effect is the windward region,sustaining cylindrical and conical vortices.The wind pressure on the roof is affected by roof shape;usually,the bulge part of the roof is sustains severe suction while the recess part is under little suction.The wind pressures on the upper and the lower surfaces of a cantilevered roof would have a superimposing effect in windward direction and a counteracting effect in leeward direction.The wind-catching effect induces high positive wind pressure on the curtain wall,when the nearby buildings are arranged in U-shape.The attached structures outside of the curtain wall would cause the wind pressure on the curtain wall increase.更多还原