STRESS DISTRIBUTION BELOW PAVEMENTS UNDER TROLLEY BUS LOADINGS

INCIDENTAL TO AN INVESTIGATION OF THE CAUSES OF RAPID DETERIORATION OF PAVEMENTS UNDER TROLLEY BUS LOADINGS IN THE CITY OF EDMONTON A COMPREHENSIVE SERIES OF STRESS MEASUREMENTS IN THE SUB-SOIL WAS UNDERTAKEN. THE PROJECT WAS COMMENCED IN 1948 IN COOPERATION WITH THE NATIONAL RESEARCH COUNCIL OF CANADA AND THE CITY ENGINEER'S DEPARTMENT. THE STRESS DISTRIBUTION BELOW BOTH RIGID AND FLEXIBLE PAVEMENTS UNDER NORMAL TRAFFIC LOADINGS WAS INVESTIGATED. THE EFFECT OF DYNAMIC FORCES WAS ALSO ASSESSED. STRESSES WERE MEASURED WITH U.S. WATERWAYS EXPERIMENT STATION PRESSURE CELLS USING AUTOMATIC RECORDING EQUIPMENT. THE DATA INDICATE THAT THE PRESSURE DISTRIBUTION BELOW THE FLEXIBLE PAVEMENT WAS IN CLOSE AGREEMENT WITH THAT COMPUTED BY THE BOUSSINESQ EQUATIONS OF THE ELASTIC THEORY. THIS IS ALSO TRUE OF THE PRESSURE DISTRIBUTION BELOW THE RIGID PAVEMENT IF THE THICKNESS OF CONCRETE PAVEMENT IS REPLACED BY AN EQUIVALENT THICKNESS OF SOIL OBTAINED BY MULTIPLYING THE CONCRETE SLAB THICKNESS BY A CONSTANT FACTOR. THE EFFECTS OF IMPACT, BRAKING AND ACCELERATION FORCES WERE SMALL COMPARED TO THE STRESSES PRODUCED BY STATIC LOADS. /AUTHOR/

  • Supplemental Notes:
    • Vol 30, pp 396-406, 15 FIG, 3 REF
  • Authors:
    • Hardy, R M
    • Rivard, P J
  • Publication Date: 1951

Media Info

  • Monograph Title: Proceedings of the Thirtieth Annual Meeting of the Highway Research Board Held at Washington, D.C., January 9-12, 1951
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00233117
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Jul 25 1971 12:00AM