强台风“黑格比”作用下低矮房屋风压特性

根据强台风"黑格比"登陆过程近地风场的实测结果及实测房屋表面测点在强台风登陆全过程监测获取的风压数据,分析了低矮房屋迎风屋面屋沿局部测点的平均、脉动及极值风压系数的变化规律,总结了其对应风场状况下的屋面体型系数。同时,利用等压线图分析了6种风场下的屋面平均、脉动及极值风压系数的分布规律。结果表明:在接近强台风"黑格比"风眼区域,由于明显交替变化的上升及下沉气流,导致低矮房屋迎风屋面屋沿及角部等局部区域形成强大的吸力及高压区,迎风屋面最小、最大体型系数值分别达到了-6.56、3.42;屋沿各测点风压谱相互吻合较好,当频率达到4Hz后,谱能急剧下降;迎风墙面测点在3/4墙高处压力最大,背风墙面各测点风压值基本一致,湍流积分尺度对平均风压系数的影响不大,但脉动风压系数和峰值风压系数随湍流积分尺度的增大而增大。

Wind pressures on low-rise building surface during a severe typhoon 'Hagupit'

Based on the field data from the full-scale measurements of the low-rise building during typhoon 'Hagupit',the characteristics of mean,fluctuating and peak pressure coefficients on the leading edges of the roof and the roof-corner regions were investigated in this paper,and the corresponding area-averaged wind pressure coeficients were summarzed.Contours plots of the mean,minimum,maximum and RMS pressure coefficients on the roof surface were also presented.The results show that,strong suction and high press...