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Civil-Comp Conferences
ISSN 2753-3239
ISSN 2753-3239
CCC: 1
PROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
PROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Paper 27.11
The reverse centrifugal thrust in curves with small radius
F.J. Fernández1, A. Gaute2, R. Sanudo3 and D. Garcia4
1ACCISA, Cantabrian construction and engineering group, Santander, Spain.
2GIADE, Group of Instrumentation and Dynamic Analysis of Civil Works Structures. University of Cantabria, Santander, Spain.
3SUM+LAB, Transport Department. University of Cantabria, Santander, Spain.
4TECNALIA, Basque Research and Technology Alliance, Basque Country, Spain.
Full Bibliographic Reference for this paper
F.J. Fernandez, A. Gaute, R. Sañudo, D. García, "The reverse centrifugal thrust in curves with small radius", in J. Pombo, (Editor), "Proceedings of the Fifth International Conference on Railway Technology: Research, Development and Maintenance",
Civil-Comp Press, Edinburgh, UK,
Online volume: CCC 1, Paper 27.11, 2022, doi:10.4203/ccc.1.27.11
Keywords: reverse centrifugal thrust, railway curves, structural health monitoring, restricted thermal expansion.
Abstract
In order to increase lateral track resistance on curves the "DINTRA" sleeper was created. This sleeper prototype increases the transverse stiffness in railway curves. During the field validation test of the "DINTRA" sleeper on a railway curve of a track section from the North of Spain, the evolution of the transverse displacement of the railway track and the longitudinal deformation of the rails were monitored. In the course of the field test, a structural phenomenon was detected. There is a transverse displacement of the rails to the inside of the curve. The authors have named "Reverse Centrifugal Thrust in railway curves". This article tries to explain and quantify this observed phenomenon. Authors propose two formulations: first (a) a formulation to determine the temperature increase experienced in the rails that delimits the structural phenomenon of Inverse Centrifugal Thrust, and then (b) a formulation to determine the transverse displacement in railway curves as trains pass under conditions of restricted thermal expansion.
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