A TECHNIQUE FOR MEASURING THE DISPLACEMENT VECTOR THROUGHOUT THE BODY OF A PAVEMENT STRUCTURE SUBJECTED TO CYCLIC LOADING

A TECHNIQUE IS DESCRIBED FOR OBSERVATION OF THE DISPLACEMENT VECTOR FIELDS, OR MOTIONS OF THE POINTS WITHIN THE BODY OF A PAVEMENT STRUCTURE UNDER THE INFLUENCE OF CYCLIC LOADING. AN OSCILLATING LOAD OF 1000 LBS. AT 8 CYCLES PER SECOND PRODUCED BY THE DYNAFLECT IS APPLIED TO THE SURFACE. THE VERTICAL AND HORIZONTAL COMPONENTS OF THE DISPLACEMENTS WERE MEASURED BY EMPLACING A SENSOR IN A SMALL HOLE DRILLED INTO THE BODY OF THE PAVEMENT. OBSERVED DISPLACEMENTS ARE SHOWN FOR THREE DIFFERENT PAVEMENT STRUCTURES. THE MEASUREMENTS WERE REPEATED AT A DIFFERENT LOCATION ON EACH STRUCTURE AND THE REPLICATE DATA SETS ARE SHOWN AND COMPARED. THEIR DIFFERENCES ARE SEEN TO BE SMALL IN COMPARISON WITH THE DIFFERENCES OBSERVED BETWEEN STRUCTURES. THE MEASURED DISPLACEMENT FIELDS ARE SHOWN TO HAVE CONSIDERABLE SIMILARITY TO FIELDS COMPUTED FOR LAYERED ELASTIC STRUCTURES. IT IS CONCLUDED THAT A PRACTICAL FIELDWORTHY TECHNIQUE HAS BEEN DEVELOPED FOR OBSERVING THE VECTOR DISPLACEMENT RESPONSE OF A PAVEMENT STRUCTURE AND THAT THE DEVELOPMENT OF A USEFUL AND PRACTICAL MATHEMATICAL MODEL REPRESENTING THE DISPLACEMENT VECTOR THROUGHOUT A PAVEMENT STRUCTURE SHOULD BE POSSIBLE. /AUTHOR/

  • Corporate Authors:

    Texas Transportation Institute

    Texas A&M University System, 1600 E Lamar Boulevard
    Arlington, TX  USA  76011

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590

    Texas State Department of Highways & Public Transp

    11th and Brazos Streets
    Austin, TX  USA  78701
  • Authors:
    • Moore, W M
    • Swift, G
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00210466
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: 136-2
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Jan 24 1972 12:00AM