【摘要】 本文从线性结构随机振动响应计算的CQC方法出发,推导出适合于大跨屋盖结构随机风振响应统计量精细计算的算式,式中考虑了不同振型响应之间互相关的影响;同时指出,如需按CQC方法进行精细计算,就必须首先获得结构各点风荷载之间互功率谱密度函数的实部和虚部.更多还原

【Abstract】 A precise formula for statistical calculation of wind induced random vibration of large span roof structures is derived in this paper, based on Complete-Quadratic-Combination (CQC) method for random vibration of linear systems. Cross-correlation between different modes is considered in the formula. It is also pointed out that, only after both real part (or co-spectrum) and imaginary part (or quadrature spectrum) of cross spectra between random wind loads of any two points are obtained, the precise calculation based on the CQC method can be carried out.更多还原