DISTRIBUTION OF AXLE-LOADS ON BALLASTED SLAB BRIDGES. MEASUREMENTS RELATING TO TESTS V1 TO V13. CONCLUSIONS AND RECOMMENDATIONS
The present report deals with a series of 13 tests on 4 different double-beam slab bridge components on ballast to determine the transverse distribution of the axle-loads. The ballast pressures acting on the 4.0 m wide and 1.95 m long double-beam slab bridge components, as well as the shape and length alterations, were measured when subjected to a load of 100 kN, 200 kN and 300 kN. The main results are: The hillshaped distribution of the ballast pressure under the two halves of a sleeper concentrates in the region under the rail. The gravity centers of the two "hills" move towards the slab supports when the loading is increased. Two rectangular loads are suggested as equivalent load pattern with the centers of gravity corresponding to those of the recorded ballast pressure hills. Formulae and diagrams are provided and the use of these will ensure the determination of the centers of gravity along more reliable lines than was the case when relying on assumptions used hitherto.
- Restrictions on the use of this document are contained in the explanatory material.
International Union of RailwaysOffice of Research and Experiments
- Publication Date: 1972-10
- Features: Figures;
- Pagination: 38 p.
- TRT Terms: Axle loads; Ballast (Railroads); Bridges; Stresses; Tests
- Uncontrolled Terms: Ballast; Bridge structures
- Old TRIS Terms: Axle loadings; Bridge stresses; Question d115
- Subject Areas: Bridges and other structures; Railroads;
- Accession Number: 00052892
- Record Type: Publication
- Source Agency: International Union of Railways
- Report/Paper Numbers: D115/RP 2/E Final Rpt.
- Files: TRIS
- Created Date: Sep 16 1976 12:00AM