Studying characteristics of train-induced ground vibrations adjacent to an elevated railway by field experiments

This paper investigates the characteristics of the ground vibration induced by moving trains on elevated railways using a number of field measurements at various train speeds. The experimental results indicate that the vibration at the dominant frequencies is quite large in both the vertical and horizontal directions, where the dominant frequencies and their influence factors can be evaluated using two simple theoretical equations deducted from the trainload in the frequency domain. Furthermore, the vibration at the dominant frequencies increases almost proportionally to the train speed, except at the resonance condition, which can be found both in field experiments and using the equation of the influence factor.