通过洪山大桥斜拉桥相似模型的动力试验 ,研究其在最长悬臂结构体系及在不同的临时支承情况下的动力特性 ,并以该桥最大悬臂施工状态为例 ,计算了结构的抖振响应 ,然后分别对主梁增设抗风临时拉索和临时墩两种减振措施进行了分析。结果表明 ,对于大跨径斜拉桥的施工阶段 ,增设抗风临时拉索和临时墩是两种具有实际工程意义的抖振控制措施 Through the dynamic test of similarity model of Hongshan Bridge cable-stayed bridge, the dynamic characteristics of the longest cantilever structural system and different temporary supports are studied. Taking the maximum cantilever construction status of the bridge as an example, the structure chattering response Then, two kinds of vibration reduction measures of additional wind-resistant temporary cables and temporary piers are respectively analyzed. The results show that for the construction stage of large-span cable-stayed bridges, adding wind-resistant temporary cables and temporary piers are two practical engineering measures of chatter control