Nowadays the problem of annoyance related to vibrations produced by human activity is increasingly felt, especially in residential areas. In addition, recent development of high-speed railways has made evident the disturbance and environmental damages caused by vibrations. In this study a mathematical prediction model, able to evaluate vibration level induced by underground railways, is presented. The model can by split into several sub-models. In the first one, namely the Generation Sub- Model, the dynamic interaction between rolling stock and railway superstructure is analyzed. In the second one, that can be named Propagation Sub-Model, interaction forces provided by the previous model are applied to tunnel invert and propagation of vibration waves is obtained by means of a finite elements method (F.E.M.) approach. The validation of the model passed through the comparison between vibration level provided by numerical simulations and on-site measurement carried out in Naples subway, yielding a fairly good agreement.
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