SOIL VIBRATION ANALYSIS DUE TO THE RAIL BOGIE MOTION

This paper presents a numerical method for analyzing dynamic soil-vibration due to rail transit. The methodology uses two 3D models; the first one is a “rail bogie-track” model rigid body based, which instantaneously provides the loads in the rail-sleeper connections created by the transit. The rail beam is discretized into a number of rigid bodies connected each other by beam elements, and linear springs, connected to the ground and depending on the mechanical characteristics of underground structures and soil. The strengths are the input for the second finite element model which evaluates “soil-structure” interaction to determinate the structural vibrations. The numerical results are performed by modelling a rail bogie of real convoy that transits on section track. The dynamic characterization is developed in frequency and time domains