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利用超声风速仪和加速度传感器现场实测了中信广场在台风“达维”的作用过程中的风场特性、建筑物表面风压以及加速度响应时程,分析了平均风速、平均风向的变化历程,以及纵向、横向和竖向风速谱特性和加速度响应谱特性。结果表明,中信广场顶部的风速谱与von Karman谱较为接近,通过现场实测的加速度响应谱得到中信广场的固有频率比有限元模型的计算结果大32%,分析认为由于非结构构件参与工作,增加了结构刚度以及结构没有满负荷工作,结构的实际质量小于有限元分析中的计算质量。
The characteristics of wind field, surface wind pressure and acceleration response time of CITIC Plaza in the process of typhoon “Daway ” were measured by using the ultrasonic anemometer and accelerometer in situ. The changes of average wind speed and average wind direction were analyzed , As well as longitudinal, transverse and vertical wind speed spectrum characteristics and acceleration response spectrum characteristics. The results show that the wind speed spectrum at the top of CITIC Plaza is close to that of von Karman spectrum. The natural frequency of CITIC Plaza is 32% larger than the finite element model calculated through the field-measured acceleration response spectrum. The analysis shows that due to the participation of non-structural components, The stiffness of the structure and the structure do not work at full capacity, the actual mass of the structure is less than the calculated mass of the finite element analysis.