【摘要】 风流经大跨度屋面结构时会产生复杂的气流分离及再附着 ,因而大跨度屋盖表面的风压分布较为复杂 ,从迎风前缘区域到尾部的风压变化梯度很大 ,这使得仅仅采用一个体型系数很难反映屋面的风荷载 .为了既简洁又准确地表达屋面风荷载 ,提出了风压分布的二维几何平面拟合方法及拟合公式 ,并进一步提出了二维几何平面及风向角的三维拟合方法及拟合公式 .最后根据屋面风压分布规律 ,将屋面分成 9个区域并给出各区域的风压系数更多还原

【Abstract】 Due to the airflow separation and re-attachment,wind pressure distribution on long-span roofs is complicated.Wind pressure changes largely from windward edge to rearward edge,so wind load on roof can not be expressed by only one pressure coefficient.Fitting method is used to show the wind load on long-span roofs exactly and simply,and for the convenience of design two-dimension fitting formula is offered in this paper.In the end,long-span roof is districted into nine sub-regions according to the distribution regularity of wind pressure and every sub-region wind pressure is provided.更多还原