论文部分内容阅读
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。
According to the measured results of near-surface wind field in the process of strong typhoon “Hagupit” landfalling and the wind pressure data obtained during the monitoring of typhoon landed at the measured points on the surface of the houses, the analysis of the local measuring points along the windward roofs of low-rise houses The average, pulsation and extreme pressure coefficient of wind changes, summed up the corresponding wind field conditions under the roof body coefficient. At the same time, the distribution law of the average roof pressure, pulsation and extreme value air pressure coefficient under six kinds of wind fields was analyzed by using isobologram. The results show that due to the obvious alternation of ascending and descending airflow in the eye area close to the strong typhoon “Hagupi ”, the strong suction and high pressure area , The windward roof minimum, the maximum body coefficient values reached -6.56,3.42; estuary wind pressure spectrum coincide with each other better, when the frequency reaches 4Hz, the spectrum can drop sharply; wind wall measuring point at 3/4 The pressure at the wall height is the maximum, and the wind pressure values at the measuring points on the leeward wall are basically the same. The turbulence integral scale has little effect on the average wind pressure coefficient, but the fluctuating wind pressure coefficient and the peak wind pressure coefficient increase with the increase of turbulence integral scale Big.