STATIC TESTS ON EXPERIMENTAL DECK MODELS BY HOLOGRAPHY

This report describes the comparative testing by the holographic interferometry method of two deck models of micro-concrete, the one being a monolithic slab and the other being formed of six girders assembled by transverse pre-stressing. These tests have enabled the part played by the load/transverse pre-stressing ratio to be revealed as well as the areas of influence of the transverse prestressing. The coefficient of friction is 0.4 for the model. Is it the same for real concrete? In practice, three or four cross-ties must give almost as good a load distribution as continuous clamping, as can be shown by the theory of diaphragms. What is the value of proving an approximately 45% spread of pre-stress? If mating surfaces are good, or the irregularities are grouted, or filled with fairly stiff material, no reason exists to suppose a different distribution of pre-stress than in a homogeneous construction.

• Supplemental Notes:
  • Restrictions on the use of this document are contained in the explanatory material. Prepared by the ORE Specialists Commiteee D123. Original text in French. Also published in English and German.
• Corporate Authors:

  International Union of Railways

  Office of Research and Experiments
  Utrecht,   Netherlands 
• Publication Date: 1977-4

Media Info

• Features: Appendices; Figures;
• Pagination: 18 p.

Subject/Index Terms

• TRT Terms: Bridge decks; Bridges; Concrete bridges; Girder bridges; Holography; Lasers; Stresses
• Old TRIS Terms: Bridge stresses; Question dt61(D123)
• Subject Areas: Bridges and other structures; Railroads;

Filing Info

• Accession Number: 00053241
• Record Type: Publication
• Source Agency: International Union of Railways
• Report/Paper Numbers: DT 61 (D 123)E
• Files: TRIS
• Created Date: Jan 30 1978 12:00AM