THEORETICAL ANALYSIS OF STRUCTURAL BEHAVIOR OF ROAD TEST FLEXIBLE PAVEMENTS

DATA FROM THE AASHO ROAD TEST AND SIMILAR EXPERIMENTS WERE ANALYZED AS THEY APPLIED TO THE STRUCTURAL BEHAVIOR OF FLEXIBLE PAVEMENTS IN TERMS OF EXISTING THEORIES. DATA ON DEFLECTION AND STRESSES MEASURED DURING THE TEST, AS WELL AS DATA ON MECHANISMS OF PAVEMENT FAILURE, ARE EMPLOYED AND ANALYZED. PARTICULAR ATTENTION IS DEVOTED TO MECHANISMS OF FAILURE UNDER CRITICAL LOADS. IT APPEARS THAT THERE EXISTS, FOR A GIVEN SUBGRADE, A CRITICAL SUBGRADE BEYOND WHICH THE RUTTING IS EXTENDED INTO THE SUBGRADE. THIS FINDING JUSTIFIES SELECTION OF THE LIMITING SUBGRADE STRESS AS A DESIGN CRITERION. IT IS SHOWN THAT THE LOAD SPREADING ABILITIES OF FLEXIBLE PAVEMENTS WITH CONVENTIONAL UNTREATED BASES ARE VERY LIMITED. THE STRESSES AND DEFLECTIONS VARY WITH PAVEMENT TEMPERATURE AND THE DEGREE OF SATURATION OF THE SUBGRADE, AS WELL AS WITH THE VEHICLE SPEED. AT CREEPING VEHICLE SPEEDS OVER THE MAJOR PART OF THE YEAR, EXCEPTING FROST PERIODS, THE STRESS AND DEFLECTION PATTERNS ARE SIMILAR TO THOSE PREDICTED BY THE BOUSSINESQ THEORY FOR HOMOGENEOUS SOLID.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/nchrp/nchrp_rpt_10.pdf
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00775614
• Supplemental Notes:
  • Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved. No 10, 31 PP, 23 FIG, 17 TAB, 44 REF
• Authors:
  • Vesic, A S
  • Domaschuk, L
• Publication Date: 1964

Media Info

• Media Type: Digital/other
• Pagination: 31p
• Serial:
  • NCHRP Report
  • Issue Number: 10
  • Publisher: Transportation Research Board
  • ISSN: 0077-5614

Subject/Index Terms

• TRT Terms: Boussinesq equation; Deflection; Design; Flexible pavements; Pavement design; Percent saturation; Speed; Stresses; Structural analysis; Structural mechanics; Subgrade (Pavements); Temperature; Theory; Vehicles
• Identifier Terms: AASHO Road Test
• Uncontrolled Terms: Data; Design criteria; Structural behavior
• Old TRIS Terms: Boussinesq formula
• Subject Areas: Design; Highways; Pavements; Vehicles and Equipment;

Filing Info

• Accession Number: 00205317
• Record Type: Publication
• Files: TRIS
• Created Date: Oct 20 1994 12:00AM