Analysis of the Vehicle-Track-Structure-Soil Dynamic Interaction of Railway Bridges for Hst

Abstract eng:
The dynamic vehicle-track-bridge-soil interaction is studied on high speed lines. The analysis is carried out using a general and fully three dimensional multi-body-finite elementboundary element model, formulated in the time domain to predict vibrations due to the train passage over the bridge. The vehicle is modelled as a multi-body system, the track and the bridge are modelled using finite elements and the soil is considered as a homogeneous halfspace by the boundary element method. Usually, moving force model and moving mass model are employed to study the dynamic response of bridges. In this work, the multi-body system allows one to consider the quasi-static and dynamic excitation mechanisms. Soil-structure interaction is taken into account on the dynamic behaviour on simply-supported short span bridges. The influence of soil-structure interaction is analysed in both resonant and nonresonant regimes.

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