INFLUENCE OF TRACK-WORK ON BUILDING RESPONSE TO RAILWAY VIBRATION

摘要

A simplified multi layered railway track model is first used to estimate and compare the frequency dependant insertion loss of three different types of track-work: under bearing plate pads, under sleeper pads and ballast mat. A 2D BEM / FEM ground structure vibration interaction model, experimentally validated, is then used to estimate the influence of track-work on the building response: the estimated transfer function between free field ground vibration and building vibration is applied to measured railway free field ground signals, modified by the track-work insertion loss, in order to get the resulting building floor vibration signals. Results are finally expressed in terms of currently used vibration exposure indicators.