考虑背景响应的斜拉桥侧向抖振响应分析

Lateral buffeting response analysis of cable stayed bridges including background response

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

The formulae including both background and resonant response are given, and detailed lateral buffeting response analysis of Qingzhou cable stayed bridge over Min river are presented,in which all the effects including self excited aerodynamic forces, aerodynamic admittance and background response are taken into account. The results indicate that the background response of lateral buffeting of Qingzhou cable stayed bridge should not be neglected.