Numerical analysis of building under low-frequency vibrations induced by subway running train

The train was simulated by a series of moving axle load applied on the track.Using the continuous elastic double layers beam model of track structure,the forces between the sleepers and the tunnel inlay produced by the running of certain subway train were calculated.On the basis of the model,numerical model of tunnel-soil-building was established.The vibration characteristics of different floors of the building with different distances to the railway track and at different train speeds were obtained.The results show that the moving train axle load induces building low-frequency vibrations.Higher train speed induces larger structural vertical vibrations.The longer the distance between a building and the track,the smaller the structural vertical vibrations would be.The vertical vibration levels of different floors are basically the same.