上海浦东足球场风洞试验和风振响应分析

Wind tunnel test and wind-induced response analysis of Shanghai Pudong Football Field

上海浦东足球场为跨度211m的轮辐式张弦结构体系,对其屋盖风荷载进行了研究。首先,通过1/300缩尺比的同步多点刚性模型测压风洞试验获得了屋盖上下表面的风平均内压和风压系数;其次,由风洞试验结果分析得到24个风向角下100年重现期对应的屋盖表面的风峰值外压;最后,结合结构的动力特性以及风洞试验结果计算了结构的风振响应和等效静力风荷载。结果表明:屋盖平均内压分布均匀并且随风向角变化不大;在迎风面外边缘可能出现最大的峰值外压;屋盖整体结构沿竖向的平均气动力和等效静力风荷载随风向角的变化有相似的变化趋势。

Shanghai Pudong Football Field is a 211m-span spoke string structural system.The wind load on the roof was studied.Firstly,the wind tunnel test of 1/300 scale synchronous multi-point rigid model was carried out to obtain the average wind pressure and wind pressure coefficient of the upper and lower surfaces of the roof;secondly,the peak external pressure of the roof surface corresponding to the 100 year return period under 24 wind directions was obtained by analyzing the wind tunnel test results;finally,the wind-induced vibration response and the static wind load of the structure were calculated based on the dynamic characteristics of the structure and the wind tunnel test results.The results show that the average internal pressure distribution of the roof is uniform and does not change with the wind direction angle;the maximum peak external pressure may appear at the outer edge of the windward surface;the average aerodynamic force and equivalent static wind load of the whole roof structure along the vertical direction have similar change trend with the change of wind direction angle.