SENSITIVITY ANALYSIS TO DETERMINE THE RELATIVE INFLUENCE OF MATERIALS CHARACTERIZATION ON A FATIGUE-DAMAGE MODEL

THE CONCEPT OF AND A PROCEDURE FOR CONDUCTING A DETERMINISTIC SENSITIVITY ANALYSIS TO ESTABLISH THE RELATIVE INFLUENCE OF MATERIALS CHARACTERIZATION ON THE PREDICTION OF THE FATIGUE PERFORMANCE OF ASPHALT CONCRETE PAVEMENTS ARE PRESENTED. THE EFFECTS OF ISOTROPIC LINEAR-ELASTIC MATERIALS CHARACTERIZATION ON FATIGUE PERFORMANCE PREDICTION ARE COMPARED WITH THE EFFECTS ASSOCIATED WITH ENVIRONMENT, AND FATIGUE CRITERIA VARIABILITY. THE RESULTS OF THE STUDY HAVE PERMITTED AN EVALUATION OF THE ADEQUACY OF AN ISOTROPIC LINEAR-ELASTIC CHARACTERIZATION OF THE THREE MOST COMMON TYPES OF MATERIALS USED IN FLEXIBLE PAVEMENT CONSTRUCTION (ASPHALT CONCRETE, UNTREATED GRANULAR BASE COURSE, AND SUBGRADE) FOR THREE TYPICAL STRUCTURAL SECTIONS AND FOR A RANGE OF TEMPERATURES. FOR SEVERAL SPECIFIC STRUCTURAL SECTIONS AND ENVIRONMENTS, IT WAS FOUND THAT IMPROVED MATERIAL CHARACTERIZATION BEYOND ISOTROPIC LINEAR ELASTICITY COULD SIGNIFICANTLY REDUCE THE UNCERTAINTY (VARIATION) OF FATIGUE LIFE PREDICTION. HOWEVER, BOTH THE CONSTRUCTION CONTROL OF AIR VOIDS IN THE ASPHALT CONCRETE AND THE INHERENT VARIABILITY IN THE EXPERIMENTAL DEFINITION OF THE FATIGUE CRITERIA THEMSELVES ALWAYS CONTRIBUTED MORE UNCERTAINTY TO THE PREDICTION OF FATIGUE PERFORMANCE THAN THE UNCERTAINTY CONTRIBUTION ASSOCIATED WITH LINEAR ISOTROPIC MATERIALS CHARACTERIZATION.

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 139-152
  • Monograph Title: Pavement systems analyses
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00207626
  • Record Type: Publication
  • ISBN: 0309022509
  • Files: TRIS, TRB
  • Created Date: May 15 1974 12:00AM