STUDY OF THE DEFORMABILITY OF THE BALLAST-PLATFORM SYSTEM ON A RAILWAY TRACK UNDER VERTICAL LOAD ACTION

ESTUDIO DE LA DEFORMABILIDAD DEL SISTEMA BALASTO-BLATAFORMA EN UNA VIA FERREA BAJO LA ACCION DE CARGAS VERTICALES

The research described in this article is centered on the study and analysis of the factors defining the vertical rigidity of the ground-ballast-platform assembly of a railway track, firstly from the theoretical point of view and secondly from a practical one, using experiments carried out on specific Spanish railway lines subjected to a daily operational traffic load. The starting point for the research has been the theory of the floating beam currently used in calculating vertical stresses on the track in conjunction with the theories of elastic systems and interesting results have been deduced. By using methods such as that of finite elements, results have been obtained which would not have been possible using elastic theories. After a bibliographical review, a critical analysis of the current state of the art is given, as well as a study of the parameters on which the rigidity of the track depends, field experiments, ballast-platform assembly behaviour, laboratory tests carried out, general interpretation of the experimental research work done and the effects of the different ballast characteristics. /TRRL/

• Corporate Authors:

  Higher Technical Schl of Road, Canal & Port Engrs

  Ciudad Universitaria S/N
  Madrid 3,   Spain 
• Authors:
  • Lopez, A
• Publication Date: 1976-5

Language

• Spanish

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: 324 p.

Subject/Index Terms

• TRT Terms: Ballast (Railroads); Bibliographies; Deflection; Finite element method; Loads; Mechanical properties; Railroad tracks; Railroads; Stability (Mechanics); Stiffness; Subgrade (Pavements); Tests; Theses; Train track dynamics
• Uncontrolled Terms: Vertical; Vertical loads
• Old TRIS Terms: Ballast mechanics; Railway; Track response investigations; Track structures
• ITRD Terms: 8518: Bibliography; 5586: Deflection; 6490: Finite element method; 5567: Load; 5930: Stability; 5931: Stiffness; 6255: Test; 8597: Thesis; 9087: Vertical
• Subject Areas: Geotechnology; Materials; Railroads;

Filing Info

• Accession Number: 00163876
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Thesis
• Files: ITRD, TRIS
• Created Date: Feb 16 1978 12:00AM