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为研究参振振型对大跨屋盖结构风致响应和风振系数的影响,根据对某体育馆进行风洞刚性模型测压试验所获得的数据,计算了该体育馆屋盖结构的风致响应及风振系数,进而研究了参与计算的振型数量对于风致响应和风振系数分析结果的影响,并且对比分析了考虑各振型交叉项的CQC法和不考虑振型交叉项的SRSS法时的分析结果,发现是否考虑高阶振型对体育馆屋盖结构的风致响应与风振系数的计算结果有一定的影响,而振型交叉项的影响也不可忽略。
In order to study the effect of vibration mode on the wind response and wind-induced vibration coefficient of long-span roof structure, the wind-induced response and wind-induced vibration of the roof structure of the stadium were calculated according to the data obtained from the pressure test of the rigid- Then, the influence of the number of modal shapes involved in the calculation on the wind response and the wind-induced vibration coefficient is studied, and the results obtained when considering the CQC method considering the cross terms of each mode shape and the SRSS method without considering the vibrational cross terms are comparatively analyzed. It is found that whether the high-order mode shapes take into account the wind-induced responses of the stadium roof structures and the results of the wind-induced vibration coefficients is affected to some extent, and the influence of the modal cross-over terms can not be neglected.