SMALL-SCALE STATIC LOAD MODEL STUDY: BEHAVIOR OF RIGID PAVEMENT LOADED NEAR THE EDGE

THIS REPORT PRESENTS THE RESULTS OF A SMALL-SCALE LOAD MODEL STUDY. IT EXAMINES THE EFFECTS OF LOADING A RIGID SLAB ON AN ELASTIC FOUNDATION IN THE TRANSITIONAL AREA BETWEEN THE EDGE AND INTERIOR OF THE SLAB. THE MODEL WAS A 0.130-IN. THICK HYDROSTONE SLAB SUPPORTED BY A 12-IN. THICK LAYER OF NATURAL RUBBER. THE SLAB WAS INSTRUMENTED WITH TYPE A-7, SR-4 ELECTRICAL STRAIN GAGES MOUNTED ALONG ONE CENTERLINE OF THE SLAB. THE GAGES WERE POSITIONED TO INDICATE STRAINS PARALLEL AND PERPENDICULAR TO THE EDGE, ROM THE EDGE TO THE CENTER OF THE SLAB. THE BEHAVIOR OF THE SLAB WAS OBSERVED BY NOTING THE CHANGE IN STRAIN EFFECTED BY LOADS APPLIED STATICALLY THROUGH CIRCULAR FOOTPRINTS AT VARIOUS POINTS ALONG THE INSTRUMENTED CENTERLINE. THE FINAL RESULTS ARE PRESENTED IN NON-DIMENSIONAL TERMS. THE MAXIMUM STRESS FOR A PARTICULAR LOAD IS GIVEN AS A PERCENTAGE OF THE MAXIMUM EDGE STRESS FOR THE SAME LOADING POSITIONED TANGENT TO THE EDGE OF THE SLAB. OTHER OBSERVATIONS INDICATE THAT: THE EFFECTIVE MODULUS OF THE SUBGRADE AS DETERMINED BY VOLUMERTRIC DISPLACEMENT TESTS WAS HIGHER AT THE EDGE THAN AT THE INTERIOR; THE MODULUS OF SUBGRADE REACTION WAS DEPENDENT ON THE DISTANCE FROM THE CENTER OF GRAVITY OF THE LOAD TO THE EDGE; THE MODULUS OF SUBGRADE REACTION WAS ONLY SLIGHTLY AFFECTED BY THE SIZE OF THE LOADED AREA; AND IN THE REGION NEAR THE EDGE, THE MAXIMUM STRESS WAS NOT NECESSARILY AT THE EDGE OF THE SLAB OR AT THE CENTER OF THE LOADED AREA. HOWEVER, WHEN THE LOAD WAS TANGENT TO THE EDGE, THE MAXIMUM STRESS WAS AT THE EDGE. /AUTHOR/

  • Supplemental Notes:
    • TECHNICAL REPORT S-4
  • Corporate Authors:

    Construction Engineering Research Laboratory

    Army Corps of Engineers, P.O. Box 4005
    Champaign, IL  USA  61820
  • Authors:
    • Behrmann, R M
  • Publication Date: 1972-4

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 21 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00206019
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 7 1972 12:00AM