Degradation at transition zones in railway tracks: 1-D and 2-D model comparison

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Abstract

Transition zones in railway tracks are areas with considerable variation of track properties (i.e., foundation stiffness) encountered near structures such as bridges. Due to strong amplification of the railway track’s response, transition zones are prone to rapid degradation. To study this degradation, researchers and engineers have developed models ranging from simple 1-D models (e.g., beam on Winkler foundation) to complex 3-D models with accurate geometry and material behaviour. This study compares a 1-D model to a 2-D one with the aim of assessing if the degradation patterns predicted by the more simplistic model are accurate. We choose a very simple geometry for the 2-D model such that the comparison is restricted to (mainly) the influence of the soil layer (present in the 2-D model) on the predicted degradation at transition zones; incorporating the soil layer makes the response of the supporting structure frequency and wavenumber dependent as well as non-local, characteristics which are not usually incorporated in 1-D models. Preliminary results show that the degradation predicted by the 1-D model is significantly larger than the one in the 2-D model.
Original languageEnglish
Publication statusPublished - 2022
Event10th European Nonlinear Oscillations Conference - Lyon, France
Duration: 17 Jul 202222 Jul 2022

Conference

Conference10th European Nonlinear Oscillations Conference
Abbreviated titleENOC22
Country/TerritoryFrance
CityLyon
Period17/07/2222/07/22

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