A LABORATORY INVESTIGATION OF THE APPLICATION OF TRANSFER FUNCTIONS TO FLEXIBLE PAVEMENTS

TRANSFER FUNCTION THEORY WAS APPLIED TO EXAMINE THE BEHAVIOR OF FLEXIBLE PAVEMENTS. NUMERICAL CONVOLUTION WAS USED TO DERIVE PAVEMENT RESPONSE FUNCTIONS FROM IMPULSE TESTING OF THREE-LAYER, FLEXIBLE MODEL PAVEMENTS; ANALYTICAL CONVOLUTION, TO CALCULATE DEFLECTIONS RESULTING FROM STATIC AND REPEATED LOADS. NONLINEAR REGRESSION WAS USED TO APPROXIMATE THE RESPONSE FUNCTIONS IN A MATHEMATICAL MODEL THAT INCLUDED, UNDER CONTROLLED LABORATORY CONDITIONS, PARAMETERS MORE SIGNIFICANT THAN THOSE COMMONLY USED. THE MODEL DERIVED WAS USED AS INPUT IN THE ANALYTICAL CONVOLUTIONS. THE ADEQUACY OF THE DEVELOPED MODELS WAS VERIFIED BY COMPARING PREDICTED AND MEASURED DEFLECTIONS. CURVE-FITTING OF THE DYNAMIC PEAK DEFLECTION DATA, BY NONLINEAR REGRESSION, RESULTED IN A MATHEMATICAL FUNCTION FOR THE DEFLECTION BASIN. A SILTY SAND SUBGRADE, A CRUSHED AGGREGATE BASE, AND AN ASPHALT CONCRETE SURFACE CONSTITUTED THE COMPONENTS OF THE THREE-LAYER SYSTEMS. EACH LAYER MATERIAL WAS CHARACTERIZED BY A SERIES OF CONVENTIONAL LABORATORY TESTS. MODEL PAVEMENTS, OF TWO DIFFERENT SURFACE COURSE THICKNESSES, WERE TESTED STATICALLY AND DYNAMICALLY AT THREE DIFFERENT STRESS LEVELS. TEST TEMPERATURES WERE 50, 75, AND 100 F. DEFLECTIONS WERE MEASURED AT FIVE SPATIAL LOCATIONS. THE FINDINGS ARE REPORTED. /AUTHOR/

  • Supplemental Notes:
    • APPS
  • Corporate Authors:

    Purdue University/Indiana Department of Transportation JHRP

    Purdue University, School of Civil Engineering
    West Lafayette, IN  United States  47907-1284
  • Authors:
    • Ali, G A
  • Publication Date: 1972-9

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 200 p.
  • Serial:
    • Issue Number: 34

Subject/Index Terms

Filing Info

  • Accession Number: 00207481
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 28 1972 12:00AM