Measurement and Reproductive Analysis of Vibration Characteristics of Structures Using Running Train

Using excited vibrations by running trains, the measurements of characteristics of RC rigid-frame structures with spread foundation were carried out. In this measurement, the damping ratios varied from 2.66% to 6.50%, although the measured structure was same. Although the previous studies indicated the interrelation between the height and the frequency of structures, and the interrelation between damping ratio and frequency of structures, these interrelations were not disclosed in this measurement. Moreover, train running FEM analyses with whole model with appropriate constitutive laws were carried out to reproduce the measured vibrations. The parametrical study of structure’s damping ratio, whole model’s frequency, damping ratio and vibration wave shape were almost same as the measured ones. As a result, by applying proper constitutive law and damping ratio of the structure, vibration characteristics and vibration behaviour of structure could be evaluated.