STRESSES AND STRAINS IN VISCOELASTIC MULTILAYER SYSTEMS SUBJECTED TO MOVING LOADS

A METHOD PROGRAMMED FOR A HIGH-SPEED COMPUTER IS DEVELOPED FOR DETERMINING THE STRESSES AND STRAINS IN VISCOELASTIC MULTILAYER SYSTEMS SUBJECTED TO MOVING LOADS. THE METHOD, WHICH CAN BE APPLIED TO SYSTEMS CONSISTING OF ANY NUMBER OF LAYERS AND ANY TYPE OF LINEAR VISCOELASTIC MATERIALS, IS BASED ON THE PRINCIPLE OF ELASTIC-VISCOELASTIC CORRESPONDENCE AND AN APPROXIMATE PROCEDURE OF COLLOCATION. NUMERICAL SOLUTIONS, WHICH DO NOT CONSIDER THE INERTIA EFFECT, ARE PRESENTED FOR THE STRESSES AND STRAINS IN A FOUR-LAYER SYSTEM. OF PARTICULAR INTEREST ARE THE COMPRESSIVE STRESSES AND STRAINS ON THE SURFACE OF THE SUBGRADE, LAYER 4, AND THE TENSILE STRAINS AT THE BOTTOM OF THE ASPHALT-BOUND LAYER, LAYER 1, BECAUSE THESE STRESSES AND STRAINS HAVE BEEN SUGGESTED AS CRITERIA FOR PAVEMENT DESIGN AND EVALUATION. A STUDY OF THESE CRITICAL STRESSES AND STRAINS SHOWS THAT THEY ALL DECREASE WITH THE INCREASE IN SPEED OF THE MOVING LOAD. IF THE COMPRESSIVE STRESS ON THE SUBGRADE IS CONSIDERED AS A CRITERION, EITHER THE VERTICAL OR THE PRINCIPAL STRESS CAN BE USED WITH LITTLE DIFFERENCE. HOWEVER, IF THE COMPRESSIVE STRAIN ON THE SUBGRADE OR THE TENSILE STRAIN IN THE ASPHALT-BOUND LAYER IS CONSIDERED, A CRITERION BASED ON THE VERTICAL OR THE RADIAL STRAIN WILL BE CERTAINLY QUITE DIFFERENT FROM THAT BASED ON THE PRINCIPAL STRAIN BECAUSE OF THE SIGNIFICANT EFFECT OF THE SHEAR STRAIN.

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 60-71
  • Monograph Title: Soil slopes and embankments
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00236760
  • Record Type: Publication
  • ISBN: 0309021901
  • Files: TRIS, TRB
  • Created Date: Jan 31 1974 12:00AM