Based on wind pressure data from wind tunnel tests, the wind-induced responses of sun-valley structure of Expo Axis were calculated both in frequency domain and time one. Then, the characteristics of the wind-induced responses were analyzed. The RSM values, the peak values and the power spectral density of some typical displacements and element axial forces obtained with two different methods mentioned above were compared. The results indicated that the RSM values computed in frequency domain are smaller than those in time domain; the comparison of power spectral density curves shows similar energy distributions; the most unfavorable condition is 225°wind direction.%基于刚性模型风洞试验获得的建筑表面风压分布结果,分别采用频域和时域方法,对一个特大型复杂空间结构进行了风振响应计算.分析了结构的响应特性,并对两种计算方法得到的典型节点位移及单元轴力的均方根值、峰值及功率谱曲线进行了比较.结果表明,频域方法计算结果小于时域方法;两种方法计算的响应功率谱曲线反映了类似的能量分布;225°风向角是结构的最不利工况.
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