Abstract: The fundamentals of pedestrianinduced vibration of footbridges were introduced, and a mechanics model of pedestrianinduced forces was presented under the condition of considering the pedestrianbridge interaction. According to the current research of long span footbridges, two comfort evaluation indexes of pedestrianinduced vibration were proposed. At the same time, a long span footbridge was used as an example to demonstrate the process of comfort evaluation. Considering the importance of this footbridge, a prescheme of vibrationreduction was designed based on tuned mass damper (TMD). The result illustrates that in this footbridge there is no pedestrianinduced vibration which exceeds comfort index.

Key words: footbridges, pedestrianinduced forces, pedestrianinduced vibration, comfort evaluation, vibration reduction design