周边建筑对体育馆屋盖和幕墙风荷载的干扰

Effects of Surrounding Buildings on Wind Loads of Roof and Curtain Walls of a Stadium

分析张家界体育中心体育馆的风洞测压数据,分别考虑无周边建筑和有周边建筑2种情况,以屋盖和幕墙的风压为研究对象,研究周边场馆对屋盖和幕墙风荷载的干扰影响;采用干扰因子分析法和多阶模态力法分析屋盖等效风荷载.分析表明:在干扰影响下,屋盖峰值负压的干扰因子达到1.5,峰值正压的干扰因子达到5;干扰影响下的幕墙最不利风压集中位置为干扰体周边的幕墙凹陷处和干扰体周边的幕墙拐角处.

Mutual aerodynamic interference effects of stadiums have been a major problem in engineering design.Based on the pressure data acquired from the wind tunnel test of a rigid model of Zhangjiajie Stadium,the wind loads of the roof and the curtain walls of the stadium were discussed in order to study the interference effect of surrounding buildings.The interference factor method and multi-level modal force method were applied to calculate the Stadium roof＇s equivalent wind loads.Several conclusions were drawn.Because of interference effect,the wind loads of the roof of the stadium were much larger than those of the non-interfered parts.The interference factor of peaking negative pressures reached 1.5 and the interference factor of peaking positive pressures reached 5.Unfavorable wind pressure of curtain walls of the stadium appeared at the sag position and the corner position of curtain walls.