PREDICTING PAVEMENT PERFORMANCE USING TIME-DEPENDENT TRANSFER FUNCTIONS

AN APPROACH USING A REAL WORLD MODELING TECHNIQUE WAS DEVELOPED TO PREDICT THE PERFORMANCE OF FLEXIBLE PAVEMENT SYSTEMS SUBJECTED TO DYNAMIC LOAD INPUTS. "A POSTERIORI" MODELING WAS PRESENTED IN CONTRAST TO THE NORMALLY ACCEPTED "A PRIORI" MODELING TECHNIQUE. WITH THIS APPROACH, THE INITIAL HYPOTHESIS WAS THAT TIME- DEPENDENT FUNCTIONS COULD BE CALCULATED FROM A PAVEMENT'S DYNAMIC INPUT AND OUTPUT DEFLECTION RESPONSES; THAT THESE FUNCTIONS COULD BE OBTAINED, IN A MATHEMATICAL SENSE, WITHOUT THE NEED TO SIMULATE RESPECTIVE MATERIAL PERFORMANCE TO DETERMINE VALUES FOR PRESELECTED DESCRIPTORS; AND THAT THESE TIME- DEPENDENT FUNCTIONS COULD BE EMPLOYED TO PREDICT DEFLECTION OUTPUT RESPONSES WHEN THE PAVEMENT WAS SUBJECTED TO ANY IMPOSED LOAD. THE INVESTIGATION WAS CARRIED OUT BY EXTENDING TRANSFER FUNCTION THEORY IN CONNECTION WITH A DECRETIZED CONVOLUTION PROCEDURE TO DEFINE THE PAVEMENT'S TIME-DEPENDENT TRANSFER FUNCTIONS. THE TIME-DEPENDENT TRANSFER FUNCTIONS WERE CALCULATED FROM DATA MEASURED DURING FULL SCALE TESTS IN A SERVICE ENVIRONMENT (THREE PAVEMENT CROSS-SECTIONS AND THREE AIRCRAFT OF DIFFERENT WEIGHTS AND GEAR CONFIGURATIONS WERE USED). SUBSEQUENTLY, A METHOD TO PREDICT DEFLECTION OUTPUT RESPONSES WAS DEVELOPED FOR USE IN CONJUNCTION WITH THE CALCULATED TIME-DEPENDENT TRANSFER FUNCTIONS. IT WAS CONCLUDED THAT THE CHARACTERISTICS OF A FLEXIBLE PAVEMENT COULD BE REPRESENTED BY A SERIES OF TIME-DEPENDENT TRANSFER FUNCTIONS OBTAINED FROM A SERIES OF DYNAMIC TESTS USING A COMMON PRIME MOVER. IT WAS ALSO CONCLUDED THAT THE TIME-DEPENDENT TRANSFER FUNCTIONS CONTAINED CERTAIN ISOLATED DESCRIPTORS WHICH WERE RELATED TO THE AIRCRAFT GEAR CONFIGURATIONS, AND OTHER DESCRIPTORS WHICH WERE ONLY INDICATIVE OF THE PAVEMENT'S BEHAVIOR. IN ADDITION, AGREEMENT WAS ACHIEVED BETWEEN THE CALCULATED AND MEASURED TIME-DEPENDENT DEFLECTION FUNCTIONS THAT RESULTED FROM EMPLOYING THE PROCEDURES IN THE PROPOSED PERFORMANCE EVALUATION METHOD. /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:
    • Boyer, R E
  • Publication Date: 1972-9

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 204 p.
  • Serial:
    • Issue Number: 32

Subject/Index Terms

Filing Info

  • Accession Number: 00207480
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 28 1972 12:00AM