对银川机场扩建工程中的航站楼主楼钢结构的风致振动效应进行了分析.简述了该建筑风洞试验的风压分布特点.采用基于里兹向量的振型分解频域法进行结构风振计算.分析了该结构的风振效应的数值和分布特点,发现平均风荷载较大区域(靠近来流区域)的风振系数相对较小,而平均风荷载较小区域(远离来流区域)的风振系数反而大.结构的平均风效应和脉动风效应并不完全符合分布相似的特点,因此在设计时简单地采用统一风振系数的做法,将不能有效反映结构的实际风致振动效应.
The wind-induced vibration analysis of the steel roof structure of Yinchuan airport terminal is carried out.The wind pressure distribution according to wind-tunnel test is introduced briefly.The Ritz-vector mode superposition method is adopted to calculate the wind-induced vibration response of the roof structure in frequency domain.By analyzing the magnitude and distribution of the structural dynamic response,it is founded that the wind-induced vibration coefficients in higher average-wind pressure zone ar...