大跨径人行桥人致振动舒适性研究

Research on Human-induced Vibration Comfort of Long-span Footbridge

摘要:

国内对大跨径人行桥人致振动舒适性研究较少，以某大跨径人行斜拉桥为例，采用强迫振动法和全桥连续行人流荷载模型，结合德国人行桥设计指南EN03(2007)，阐述了大跨径人行桥人致振动舒适性的评价过程，并采取了在桥上安装调频质量阻尼器(TMD)系统的减振措施设计。结果表明，通过减振措施，该桥的人致振动舒适性评价从“差”提高到了“最佳”。

Abstract:

There are few researches on the human-induced vibration comfort of long-span footbridges in China. Taking a long-span pedestrian cable-stayed bridge as an example, by using the forced vibration method and the full bridge continuous pedestrian flow loading model, combined with the design guide EN03(2007) of footbridge in German, the evaluation process of the human-induced vibration comfort of long-span footbridge is expounded. The measures of vibration mitigation of tuned mass damper (TMD) system installed on bridge are taken in the design. The result illustrates that the evaluation of human-induced vibration comfort of the bridge is improved from "poor" to "best" with the measures of vibration mitigation.