TMD对大跨径人行桥竖向振动控制效果研究

The Study on the Control Effect of TMD on the Vertical Vibration of Large-span Pedestrian Bridge

振动舒适度是设计大跨轻质人行桥时需要解决的关键问题之一。基于TMD的振动控制机理,对比了不同规范对人行荷载模型和人行桥舒适性指标的规定,以某人行桥为研究对象,结合相关规范规定,分析了TMD对人行桥竖向振动的控制效果。结果表明,TMD可以有效降低人群荷载激励产生的竖向加速度,提高人行桥的通行舒适度。

Based on the vibration control mechanism of TMD, this paper compared the regulations of different specification on the pedestrian load model and pedestrian bridge comfort index. For a pedestrian bridge as the research object, and combined with the relevant specification, it also analyzed the control effect of TMD on the vertical vibration of pedestrian bridge. The results showed that TMD could effectively reduce the vertical acceleration generated by crowd load excitation and improve the comfort of pedestrian bridge.