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工业厂房通常处于工业厂区内,受周边建筑的干扰,其表面风压分布与单个独立厂房不同,相邻建筑会对风荷载产生影响。基于单个厂房与两个串列厂房刚性模型风洞试验,给出了不同工况下屋面的平均风压,分析了屋盖横向、纵向端部与中部测点的平均风压分布规律,对比了不同串列距离条件下受扰厂房与独立厂房屋盖表面平均风压分布,探讨了平均风压系数干扰因子随风向角及干扰距离的变化规律。试验结果表明:不同风向角时,干扰效应截然不同;干扰效应存在临界风向角。临界风向角一般保持在30°～50°范围内,小于临界风向角时,干扰起放大效应;大于临界风向角时,干扰为遮挡效应。此外,运用最小二乘法拟合了干扰因子设计值实用计算式,为受扰厂房建筑屋盖表面风压的修正提供依据。
Industrial plants are usually located in industrial plants and are disturbed by surrounding buildings. The surface wind pressure distribution is different from that of a single independent plant. Adjacent buildings can affect the wind load. Based on the wind tunnel test of the rigid model of a single plant and two tandem plants, the average wind pressure of the roof under different operating conditions is given. The distribution of the average wind pressure at the horizontal and vertical ends of the roof and the middle measuring point is analyzed. The average wind pressure distributions on the surfaces of the disturbed and independent factory buildings under different serial distance conditions are discussed. The variation rules of the average wind pressure coefficient disturbance factor with the wind direction angle and disturbance distance are discussed. The experimental results show that the interference effect is quite different under different wind direction angles and the critical wind direction angle exists in the disturbance effect. The critical wind direction angle generally stays within the range of 30 ° to 50 °. When the critical wind direction angle is smaller than the critical wind direction angle, the interference will cause the amplification effect. When the critical wind direction angle is greater than the critical wind direction angle, the interference will be the shielding effect. In addition, the least square method is used to fit the practical calculation formula of the interference factor design value, which provides the basis for the correction of the wind pressure on the roof of the disturbed building.