体育场看台挑篷的风荷载及干扰效应分析

针对一个典型的体育场看台挑篷,进行了刚性模型风洞试验,确定其平均风压和脉动风压,通过对挑篷升力系数的讨论,分析其上下表面风压和风压合力的分布规律.并考虑临近山体对挑篷的气动干扰,分析有、无干扰体情况下升力系数的不同分布规律,采用干扰因子对比分析山体对左右两个挑篷风压的影响,同时采用脉动干扰系数来分析干扰对挑篷脉动风压的影响,得出一些具有重要参考价值的结论.

Wind pressure distribution and interference effect on a stadium covering

The paper describes the characteristic of surface pressure distribution and the interference effect of nearby hill on a stadium covering. The wind pressures were measured at the stadium covering in a turbulent boundary layer wind tunnel, which simulated the natural wind over typical suburb terrain. The lift coefficients are utilized to study the distribution of the wind pressures on upper and lower surfaces and also net wind pressures. In order to study the interference effect of the nearby hill, a foam-made model with the same length scale of the stadium was placed in the wind tunnel. The difference of the lift coefficients under condition of with and without the interference is given. Three position relationships, which are upstream, parallel and downstream, are categorized to analyze the interference effect. And the interference effect of RMS fluctuating pressure is also given. The difference of the interference effect on closer and farther covering is distinguisbed.