大跨度斜拉桥钢塔制振方案与参数分析

以南京长江第三大桥为例研究了大跨度斜拉桥钢塔施工阶段所需的制振目标及制振措施．参考相关资料确立了主塔制振所需的制振目标，并依据风洞试验结果建立制振器的设计目标值．根据该桥的固有频率范围和实际安装空间等条件选择了合理的制振方案，分别采用调谐质量阻尼器（TMD）和调谐液体阻尼器（TLD）完成不同施工状态和风速时对涡激振动的制振，进而进行了制振器的参数优化和装置设计．对制振器参数完成了敏感性分析，最终确认了使用环境下制振器对钢塔的不同施工阶段制振时的制振效果和鲁棒性能．

Parametric Study on Vibration Control Scheme for Steel Tower of Large Span Cable-Stayed Bridge

This paper investigated the vibration control countermeasures for steel towers of Nanjing Yangtze River 3rd Bridge.The control objectives of vibration were suggested,and a required damping value for vibration control devices was proposed on the basis of the results of wind tunnel tests.Considering the range of the natural frequencies of tower modes and the installation space,both tuned mass dampers(TMD) and tuned liquid dampers(TLD) were adopted for suppressing the vibrations of towers during various construction periods.The parameters of TMD and TLD were optimized and the sensitivities of these parameters to the effectiveness of the damper devices were investigated.Finally,the robustness of the damper devices was also discussed.