ANALYTICAL METHODS APPLIED TO THE MEASUREMENTS OF DEFLECTIONS AND WAVE VELOCITIES ON HIGHWAY PAVEMENTS: PART 1, MEASUREMENTS OF DEFLECTIONS

THE DYNAFLECT WAS USED TO MEASURE A NUMBER OF DEFLECTION BASINS ON HIGHWAY PAVEMENTS THROUGHOUT THE COUNTRY. IT WAS NEEDED TO DETERMINE THE ELASTIC PARAMETERS OF THE MATERIALS COMPOSING THE HIGHWAY STRUCTURE USING THE RESULTS OF THESE MEASUREMENTS. A METHOD IS DESCRIBED WHICH WAS DEVELOPED TO INTERPRET THE RESULTS OF THE MEASUREMENTS OF DEFLECTION BASINS. THE METHOD IS A NUMERICAL ONE WHICH DETERMINES VALUES OF YOUNG'S MODULI FOR THE MATERIALS COMPOSING THE LAYERS OF A HIGHWAY STRUCTURE, ASSUMING A VALUE OF POISSON'S RATIO, AND SUPPOSING THAT THE THICKNESSES OF THE LAYERS IN THE STRUCTURE ARE KNOWN. THE MEANS OF LOADING A PAVEMENT AND MEASURING THE RESULTING DEFLECTIONS AND A COMPUTATIONAL PROCEDURE RELATING THE ELASTIC PARAMETERS OF THE MATERIALS TO THE MEASURED DEFLECTIONS ARE DESCRIBED. THE METHOD WAS TESTED ON A GROUP OF RELATIVELY COMPLEX HIGHWAY STRUCTURES AND APPEARS TO BE GENERALLY APPLICABLE. THE LOADING SYSTEM OF THE DYNAFLECT MAY BE A CAUSE OF SIGNIFICANT ERROR. IF SO, THE ELASTIC MODULI FOR THE MATERIALS WOULD BE LOWER THAN THOSE OBTAINED.

• Supplemental Notes:
  • Res Rept 32-14, 69 PP, 9 FIG, 8 TAB, 15 REF, 6 APP
• Corporate Authors:

  Texas Transportation Institute

  Texas A&M University System, 1600 E Lamar Boulevard
  Arlington, TX  United States  76011
• Authors:
  • COGILL, W H
• Publication Date: 1969-3

Subject/Index Terms

• TRT Terms: Deflection; Deflection tests; Dynaflect; Dynamometers; Measurement; Modulus of elasticity; Numerical analysis; Pavements; Poisson ratio; Test procedures
• Old TRIS Terms: Pavement deflection; Poissons ratio
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 00207071
• Record Type: Publication
• Files: TRIS, ATRI
• Created Date: Mar 2 1970 12:00AM