Wind-induced dynamic behavior and wind resistant design of long-span spherical domes

对大跨度球面网壳结构的风荷载和风振特性进行了研究。首先，从一些实验的数据有关的风荷载的球形穹顶进行了审查。特别注意的上升/跨度和壁高/跨度比的表面压力的影响。然后，对跨度为80 ~ 200 m的几个穹顶结构的自由振动进行了数值分析。在风洞中测量了每个模型前六阶模态的模态力。在测量中，应用气动平均技术直接在风洞实验中获得模态力。给出了各模态力的均值、均方根值和功率谱。在此基础上，讨论了穹顶结构的风振响应特性。此外，根据对导流罩上多个位置的压力同时测量结果，讨论了压力脉动的时空相关性。

The wind loads on and the wind-induced dynamic behavior latticed spherical domes with long-spans have been studied. First, data from a number of experimants concerned with the wind loads on spherical domes were reviewed. Particular attention was paid to the effects of the rise/span and wall-height/span ratios on the surface pressures. Then, the free vibrations were numerically analyzed for several domes with spans ranging from 80 to 200 m. The modal forces of the first six modes of each model were measured in a wind tunnel. In the measurements, a pneumatic averaging technique was applied to obtain the modal force directly in the wind tunnel experiments. The mean and root-mean-square values and the power spectrum of each modal force were presented. On the basis of the results, the charaacteristics of the wind-induced dynamic response of the dome were discussed. Furthermore, the time-space correlation of the pressure fluctuations was discussed, based on the results of simultaneous pressure measurements at many locations on the dome.