某客运专线新站楼盖天桥人行激励下的振动舒适度计算

Vibration serviceability of footbridges which are in a passenger dedicated line's new station due to human activities

采用三维有限元法,对某客运专线新站站房人行天桥进行人行荷载激励作用下的振动时程响应分析,得到该人行天桥的自振特性以及横竖向加速度和位移响应。与已有的国内外规范和传统的桥梁振动舒适度评价标准进行对比分析,对该天桥在随机人行荷载激励作用下的行走舒适度进行评估。

Footbridges in a new station of passenger dedicated line were taken as an example to assess its vibration serviceability due to human activities adequately. Firstly, characteristics of free -vibration and time history method for the new station of passenger dedicated line were carried out by using FEA software. Then the characteristics of free-vibration, the displacement and acceleration distribution of footbridges were obtained by the analysis. By comparing the present domestic and foreign standards for vibration serviceability and calculating traditional bridge vibration evaluation criteria such as Diekmann index and Sperling index, the vibration serviceability of footbridges due to human activities was assessed.