Calculation of dynamic impact loads for railway bridges using a direct integration method

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Title: Calculation of dynamic impact loads for railway bridges using a direct integration method
Author(s): Gu, G.; Kapoor, Ajay; Lilley, David M.
Abstract: This paper introduces railway bridge assessment in the UK and the concept of dynamic impact loads. The dynamic impact loads demonstrated in the codes of practice in several other countries have been reviewed and have been found to be significantly different in the different codes. A technique for calculating dynamic impact load using a direct integration method has been developed. In many cases, the mass of the train may be similar to the mass of the bridge in heavy railway bridges but the mass of the vehicle is normally neglected in an analysis due to complexities in computation. Time-varying non-linear mass models are employed to reflect the effect of moving vehicle mass. An existing prototype bridge has been selected to compare results from the codes of practice and the technique developed in this study. The correlation between vehicle speed, axle load, and dynamic impact load has been investigated.
Publication type: Journal article
Research centre: Swinburne University of Technology. Faculty of Engineering and Industrial Sciences
Source: Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, Vol. 222, no. 4 (2008), pp. 385-398
Publication year: 2008
Keyword(s): Bridge vehicle interaction; Direct integration method; Dynamic impact load; Moving mass; Non-linear mass; Railway bridge assessment; Railway bridge dynamic
Publisher: Professional Engineering Publishing
ISSN: 0954-4097
Publisher URL: http://dx.doi.org/10.1243/09544097JRRT189
Peer reviewed