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贵阳奥体中心主体育场由东、西两个呈牛角造型的罩篷构成,采用了预应力平面桁架斜交网格结构体系,最大悬挑49m。对其刚性模型进行了风洞试验,给出了平均风压系数、平均风荷载体型系数及风压分布规律并与规范计算值进行了比较,详细讨论了风向角对风压系数和体型系数的影响。结果表明:在大多数风向角下,西罩篷的风荷载要比东罩篷的大,罩篷立面迎风面都是正压,在所有风向角下罩篷上、下表面基本都是负压,负压分布的局部最大值通常出现的迎风罩篷上表面的前缘和下风向罩篷上表面的后缘部分。建议对于有上、下表面围护结构的建筑应分别按内、外风荷载体型系数设计。
The main stadium of Guiyang Olympic Sports Center is composed of east and west horns with horns, with prestressed plane truss diagonal grid structure system, the maximum cantilever 49m. The wind tunnel test was conducted on the rigid model. The average wind pressure coefficient, average wind load coefficient and wind pressure distribution law were given and compared with the calculated values. The effects of wind direction on wind pressure coefficient and body coefficient influences. The results show that the wind load of the west hood is greater than that of the east hood in most of the wind directions, and the windward side of the hood face is all positive, and the upper and lower surfaces of the hood are basically negative under all wind directions The local maximum of the pressure and negative pressure distribution usually appears as the leading edge of the upper surface of the windshield and the trailing edge of the upper surface of the lowerwind. It is suggested that buildings with envelope structures on the upper and lower surfaces should be designed according to the body coefficient of internal and external wind loads respectively.