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提出采用整体平均风压系数、第1阶振型广义力和屋面各区域最不利极值风压系数的干扰因子分别综合反映干扰效应对平屋面平均风荷载、脉动风荷载和极值风压的影响,采用刚性模型测压风洞试验,对被单个相同形体建筑所干扰的平屋面表面风压进行测量,研究改变建筑物之间的相对位置和风向角,平屋面整体平均风压系数和屋面第1阶振型广义力和最不利极值风压系数干扰因子的变化规律。研究结果表明:屋面整体平均风压系数干扰因子与第1阶振型广义力干扰因子分布规律相似;施扰物在受扰物的迎风上游,遮挡效应引起的缩小效应显著;沿与风向垂直方向,施扰物与受扰物并列布置时,放大干扰效应显著;斜风向条件下的干扰效应比0°风向的影响范围大;干扰效应对屋面角部最不利极值风压影响显著,但对屋面中心区域的影响较小。
The interference factors such as the average wind pressure coefficient, the generalized force of the first mode and the most unfavorable extreme wind pressure coefficient of the roof in each area are respectively used to reflect the influence of the interference effect on the flat roof mean wind load, fluctuating wind load and extreme wind pressure , The rigid model pressure wind tunnel test is adopted to measure the wind pressure on the flat roof surface which is interfered with by a single same shape building and the relative position and wind direction angle between the buildings are changed and the average average wind pressure coefficient of the flat roof and the roof VARIATION OF INTERFERENCE FACTOR OF AIR PRESSURE COEFFICIENT FOR GENERALIZED FORCE IN THE FIRST VERTICAL MODE AND FOR THE MAXIMUM OPERATIONAL. The results show that the average wind pressure coefficient interference coefficient of the roof is similar to that of the generalized force disturbance factor of the first order mode. The shovel effect caused by the blocking effect is significant when the disturbing object is in the upwind of the disturbed object. , The effect of amplification interference is significant when the interferent and the object are arranged side by side. The interference effect under the oblique wind direction is larger than that at 0 ° direction. The interference effect has a significant effect on the wind pressure at the most unfavorable extreme of the roof corner, The roof center area has less effect.