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Influence of the ballasted track on the dynamic behaviour of steel railway bridges
Author(s) -
Stollwitzer Andreas,
Fink Josef,
Malik Tahira
Publication year - 2021
Publication title -
ce/papers
Language(s) - English
Resource type - Journals
ISSN - 2509-7075
DOI - 10.1002/cepa.1516
Subject(s) - track (disk drive) , vibration , stiffness , structural engineering , range (aeronautics) , dynamic testing , engineering , computer science , mechanical engineering , physics , quantum mechanics , aerospace engineering
The calculated dynamic behaviour of railway bridges during high‐speed traffic differs from the actual behaviour of its bearing structure. In the case of steel railway bridges, dynamic calculations often overestimate the actual vibration responses and therefore lead to uneconomical results. This gap between calculation and measurement constitutes a complex research issue, whereas the consideration of the ballasted track in dynamic calculations has a major influence. Concerning the damping and stiffness properties of the ballasted track there is a wide range of various mechanical models. However, there is no generally applicable track‐structure model for dynamic calculations which reflects reality in a satisfactory way. In their effort to close the gap between calculation and measurement and to develop accurate track‐structure models for dynamic calculations that take into account the dynamic properties of the ballasted track, researchers at TU Wien have developed a large‐scale test facility which allows for specific research of the dynamic behaviour of the ballasted track. This paper describes the operating principle of the test facility and provides insight into the dynamic effects observed in it, in particular with regard to its vibrations and damping behaviour.