PREPARATION OF AXLE LOADS

The above report contains details of a series of 13 experiments carried out on 4 sections of slabs having 2 incorporated girders, together with ballast, in order to ascertain the transversal distribution of the axle loads. The pressure of the ballast on the slab, as well as the alterations in the shape and the position of the supports used for the sections of slabs, having a width of 4.00 metres, and a length of 1.95 metres, were measured in the case of loads of 100 KN, 200 KN and 300 KN. The most important results obtained were as follows: (1) the pressure of the ballast distributed under the two halves of the sleeper in the form of a two-nipple curve, is concentrated in the area under the rail; (2) the centers of gravity of the two nipples move, when an increasing load is applied to the slab, as distinct from the latter's supports; (3) it is proposed to make use, as the equivalent load on the slab, of two rectangular loads, whose centers of gravity coincide with those of the measured curves of the pressure of the ballast; and (4) formulae and diagrams are shown to establish the position of the centres of gravity. Their application ensures values which are closer to the reality than the hypotheses adopted up to the present.

• Supplemental Notes:
  • Restrictions on the use of this document are contained in the explanatory material.
• Corporate Authors:

  International Union of Railways

  Office of Research and Experiments
  Utrecht,   Netherlands 
• Publication Date: 1972-10

Media Info

• Features: Appendices; Figures; References;
• Pagination: 152 p.

Subject/Index Terms

• TRT Terms: Axle load force; Ballast (Railroads); Bridges; Technology; Train track dynamics
• Uncontrolled Terms: Ballast
• Geographic Terms: Europe
• Old TRIS Terms: Axle loadings; Ballast deck bridges
• Subject Areas: Bridges and other structures; Railroads;

Filing Info

• Accession Number: 00053873
• Record Type: Publication
• Source Agency: International Union of Railways
• Report/Paper Numbers: D115/RP2 Report
• Files: TRIS
• Created Date: May 20 1976 12:00AM