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

•A 3D FEM model of a railway tunnel to predict railway vibrations is developed.•The model is calibrated and validated with in situ measurements.•Two 2D FEM models are developed with two methodologies to introduce the loads.•The vibrational response obtained from both models is quite different.•Input...

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Bibliographic Details
Published in:Tunnelling and underground space technology 2015-06, Vol.49, p.376-383
Main Authors: Real, T., Zamorano, C., Ribes, F., Real, J.I.
Format: Article
Language:English
Subjects:
2D/3D comparison
Acceleration
FEM
Finite element method
Mathematical models
Numerical analysis
Railway tunnels
Railway vibrations
Three dimensional models
Tunnel
Two dimensional
Underground
Vibration
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Summary:•A 3D FEM model of a railway tunnel to predict railway vibrations is developed.•The model is calibrated and validated with in situ measurements.•Two 2D FEM models are developed with two methodologies to introduce the loads.•The vibrational response obtained from both models is quite different.•Inputs of 2D models should be modified in order to obtain accurate results. 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.
ISSN:0886-7798
1878-4364
DOI:10.1016/j.tust.2015.05.004