RESISTANCE TO WARPING OF CONTINUOUSLY WELDED OLD AND NEW RAILS

This paper uses computational methods for calculation of track stability to examine the feasibility of welding the rails of older types of permanent way. It also examines the problem of warping of new, continuously welded rail, and the problem of whether very heavy rails (S64, S55) can be subjected to continuous welding in view of the fact that they employ light fastenings. The general results of these investigations can be summed up as follows: 1. Because of their particularly great moment of inertia, heavy rails can be continuously welded even when laid with simple, non-rigid fastenings. 2. With medium-heavy and light type of rails, the type of sleepering and the ballast cross-section have an important bearing on the resistance to warping. In such cases, it is advisable to examine, before the welding takes place, the safety against warping in accordance with local conditions, and to determine the minimum temperature at which the rails may be laid. 3. Because of the rail wear, the safety against warping increases to some extent with the age of the continuously welded track. It is therefore possible to accept a certain amount of slackness in the rail fastenings and a consequent reduction in the frame rigidity of the track.

• Supplemental Notes:
  • Translated from Eisenbahntechnische Rundschau, No. 9, Sept. 1955.
• Corporate Authors:

  International Railway Congress Association

  17-21 rue de Louvrain
  1000 Brussels,   Belgium 
• Authors:
  • Rubin, H
• Publication Date: 1957-3

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 199-203
• Serial:
  • RAIL INTERNATIONAL

Subject/Index Terms

• TRT Terms: Concrete; Concrete ties; Curved track; Defects; Distortion (Structures); Inertia (Mechanics); Mathematical models; Railroad rails; Railroad ties; Railroad tracks; Stability (Mechanics); Steel; Stresses; Structural design; Tangent track; Technology; Temperature; Thermal stresses; Welded rail; Wood ties
• Uncontrolled Terms: Track geometry; Track stability
• Geographic Terms: Germany
• Old TRIS Terms: Distortion; Mathematical studies; Steel cross ties; Track irregularities; Wooden cross ties
• Subject Areas: Design; Railroads;

Filing Info

• Accession Number: 00040792
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 8 1994 12:00AM