STRESS-STRAIN LAW FOR VISCOELASTIC FLEXIBLE PAVEMENTS UNDER

A NEW STRESS-STRAIN LAW INCORPORATING THE EFFECTS OF TIME AND TEMPERATURE IS PRESENTED. THE PROPOSED LAW IS INTENDED TO REPLACE THE CLASSICAL ELASTIC STRESS-STRAIN LAW USED IN THE DESIGN OF FLEXIBLE PAVEMENTS. THIS NEW STRESS-STRAIN LAW IS AN EXTENSION OF A RHEOLOGICAL STRESS-STRAIN LAW UNDER ISOTHERMAL OR ADIABATIC CONDITION. THE PROPOSED LAW PRESENTS FOR THE FIRST TIME A SIMPLE RATIONAL RELATIONSHIP FOR THE EVALUATION OF THE EFFECT OF TEMPERATURE ON TIME-DEPENDENT MATERIALS USED IN CONSTRUCTING FLEXIBLE PAVEMENTS. IN THE PROPOSED STRESS-STRAIN RELATION, THE EFFECT OF TEMPERATURE IS ACCOUNTED FOR BY A NEW MATERIAL PARAMETER K. THE K-VALUE, TO BE FOUND EXPERIMENTALLY IS EXPRESSIBLE IN TERMS OF THE WELL-KNOWN SHIFT FUNCTION. THE VALIDITY OF THE PROPOSED LAW HAS BEEN JUSTIFIED BY A SERIES OF CREEP TESTS. PREDICTIONS OF CREEP TEST RESULTS BASED ON SUCH A LAW WAS FOUND AGREEING VERY CLOSELY WITH THE ACTUALLY MEASURED RESULTS. THE PROPOSED LAW IS MUCH SIMPLER COMPARING WITH ANY THEORETICAL STRESS-STRAIN LAWS. HENCE IT PERMITS DIRECT APPLICATION TO THE DESIGN OF FLEXIBLE PAVEMENTS. /AUTHOR/

• Supplemental Notes:
  • Preprint VoL, PP 198-200, 1 FIG, 8 REF
• Authors:
  • Ku, A B
• Conference:
  • Intl Conf Struct Design Asphalt Pvmts
• Publication Date: 1967-1

Subject/Index Terms

• TRT Terms: Creep; Deformation curve; Flexible pavements; Pavement design; Temperature; Testing; Time; Viscoelastic materials; Viscoelasticity
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 00205485
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 1 1994 12:00AM