EXPERIMENTAL VERIFICATION OF DISCRETE-ELEMENT SOLUTIONS FOR PLATES AND PAVEMENT SLABS

TO OBTAIN TEST RESULTS FOR USE IN VERIFYING DISCRETE ELEMENT ANALYTICAL METHODS FOR SLABS-ON-FOUNDATION, A STUDY OF SMALL-DIMENSION PLATES AND SLABS WAS CONDUCTED, WITH THE BASIC APPROACH DIVIDED INTO TWO PARTS: (1) A CHECK OF THE MODELING AND METHOD OF SOLUTION FOR PLATES ON SIMPLE SUPPORTS FOR A VARIETY OF STIFFNESS AND LOAD CONDITIONS, AND (2) AN INVESTIGATION OF THE MODELING OF THE SOIL-STRUCTURE INTERACTION PROBLEM OF A SLAB-ON-FOUNDATION USING LINEAR AND NONLINEAR CHARACTERISTICS ACCORDING TO THE WINKLER ASSUMPTION. FOR THE FIRST PART, TESTS WERE CONDUCTED ON THIN PLATES OF TWO MATERIALS AND UNDER SIMPLE SUPPORT CONDITIONS. THESE INCLUDED ISOTROPIC PLATES UNDER SEVERAL LOADING PATTERNS, ISOTROPIC PLATES WITH DISCONTINUITY, AND ORTHOTROPIC PLATES. THE LOADS IN ALL CASES WERE RESTRICTED IN ORDER TO KEEP THE DEFLECTIONS SMALL. FOR THE SECOND PART OF THE STUDY, TESTS WERE CONDUCTED ON A SLAB RESTING ON A CLAY SUBGRADE UNDER TWO DIFFERENT LOADING CONDITIONS. PLATE LOAD TESTS WERE PERFORMED TO DETERMINE LINEAR AND NONLINEAR CHARACTERISTICS FOR REPRESENTING THE SOIL SUBGRADE. THESE CHARACTERISTICS WERE ALSO DETERMINED FROM STRESS-STRAIN RELATIONS OF THE SOIL, OBTAINED FROM UNCONFINED COMPRESSION TESTS. MEASURED DEFLECTIONS AND PRINCIPAL STRESSES OBTAINED FOR THE PLATES IN THE FIRST GROUP OF TESTS WERE COMPARED WITH THE ANALYTICAL SOLUTIONS USING INDEPENDENTLY DETERMINED MATERIAL PROPERTIES OF THE PLATES CONCRENED. FROM THE STUDY OF ALL CASES DEALING WITH THE VARIETY OF LOADINGS, SUPPORTS, AND STIFFNESSES, VERIFICATION OF THE METHOD OF SOLUTION WITHIN ACCEPTABLE ACCURACY WAS ESTABLISHED. FROM COMPARISON OF THE SECOND GROUP OF TESTS WITH THE ANALYTICAL RESULTS, IT WAS OBSERVED THAT FOR SMALL LOADS, GOOD AGGREMENT EXISTS BETWEEN EXPERIMENTAL AND ANALYTICAL SOLUTIONS USING LINEAR OR NONLINEAR SPRINGS; HOWEVER, FOR LARGER LOADS ONLY NONLINEAR SOIL CHARACTERISTICS PRODUCE GOOD AGREEMENT. BASED ON THE EXPERIMENTAL EVIDENCE, THE DISCRETE-ELEMENT MODEL METHODS PROVIDE SATSIFACTORY ANALYTICAL SOLUTION FOR TWO-DIMENSIONAL PROBLEMS. IN ADDITION TO THE RESULTS OF STATIC LOADING, EXPERIMENTAL RESULTS OF SOME CYCLIC LOADINGS ON THE SLAB ARE PRESENTED AND A PRELIMINARY ATTEMPT IS MADE TO INTERPRET THE DATA, MODIFY THE SOIL REPRESENTATION FOR CYCLIC LOADING, AND COMPARE THE EXPERIMENTAL RESULTS WITH THE ANALYTICAL SOLUTIONS THUS OBTAINED. /AUTHOR/

  • Supplemental Notes:
    • Res Rpt 56-15, 255 PP, 120 FIG, 42 TAB, 56 REF, 5 APP
  • Corporate Authors:

    University of Texas, Austin

    Center for Highway Research, 200 West 21st Street
    Austin, TX  United States  78712
  • Authors:
    • Agarwal, S L
    • Hudson, W R
  • Publication Date: 1970-4

Subject/Index Terms

Filing Info

  • Accession Number: 00205833
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 28 1970 12:00AM