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对福州市青州路闽江结合梁斜拉桥主梁侧向抖振响应进行了较为详细的分析 ,较全面地考虑了气动导纳、自激气动力和背景响应的影响 ,为对未考虑背景响应的抖振分析结果进行修正 ,定义了背景响应修正系数并给出了计算公式 ,计算了闽江斜拉桥的侧向抖振响应 ,与未考虑背景响应影响的有限元分析结果进行了对比 ,对侧向抖振位移响应以及背景响应比例进行了参数分析。分析表明 :闽江斜拉桥背景响应的贡献不可忽略
The lateral buffeting response of the main girder of Minjiang composite cable-stayed bridge over Qingzhou Road in Fuzhou City is analyzed in detail. The effects of aerodynamic admittance, self-excited aerodynamic force and background response are comprehensively considered. The results of chattering analysis are modified, the background response correction factor is defined and the formula is given. The lateral chattering response of Minjiang cable-stayed bridge is calculated, which is compared with the results of finite element analysis without considering the influence of background response , Parametric analysis of lateral chattering displacement response and background response ratio were carried out. The analysis shows that the contribution of background response of Minjiang cable-stayed bridge can not be neglected