Train-induced vibration prediction in tunnels using 2D and 3D FEM models in time domain

The purpose of this study is to develop a 3D numerical FEM model of a railway tunnel to predict railway induced vibrations, which is calibrated and validated with in situ measurements. After that, two different 2D FEM models are constructed following the same assumptions as in the 3D model but different methodologies to introduce the loads. The results from the different models are used to determine the existing differences among each type of model, and the scope of each one. Vertical accelerations are obtained from each model and compared among them, concluding that the 3D FEM models provide more accurate results with a longer calculation time and require huge computational requirements.