Abstract: The continuous rigid frame bridge with high pier and large span is very flexible at the longest cantilever construction stage,and turbulence wind often brings the great buffeting responses,which is going to affect the structure itself and the safety of construction.According to the requirements of practical engineering,the buffeting response spectrum analysis method is simplified,and the applied formula also considering the effect of background response is presented.The reliability of applied formula is verified by the full-scale aero-elastic model in wind tunnel testing.

Key words: continuous rigid frame bridge, buffeting response, simplified formula

摘要： 高墩大跨度连续刚构桥在最大悬臂施工状态下,由于结构刚度尚未完全形成,脉动风将会引起的结构较大的抖振响应,势必会对结构本身以及施工安全造成影响。从实际工程应用出发,在对抖振计算反应谱法进行适当简化的基础上考虑了背景响应的影响,获得了连续刚构桥在最大悬臂施工状态下抖振响应的实用计算公式。最后通过气弹模型风洞试验验证了公式的可靠性。

关键词: 连续刚构桥, 抖振响应, 简化计算公式