PAVEMENT DEFLECTIONS AND FATIGUE FAILURES

THIS IS A CONTINUATION OF THE PAPER ENTITLED THE FACTORS UNDERLYING THE RATIONAL DESIGN OF PAVEMENTS APPEARING IN THE 1948 PROCEEDINGS OF THE HIGHWAY RESEARCH BOARD. THE ORIGINAL WORK INDICATED THE IMPORTANCE OF FATIGUE FAILURES CAUSED BY RESILIENCE IN THE SUPPORTING SOILS. THIS PAPER DESCRIBES THE INITIAL WORK OF MEASURING DEFLECTIONS OVER A WIDE VARIETY OF PAVEMENTS. EXAMPLES ARE SHOWN ILLUSTRATING THE LOAD- DEFLECTION CURVES WHERE PAVEMENTS ARE SHOWING SIGNS OF FAILURE AND ON OTHER SECTIONS WHERE CONDITIONS ARE GOOD OR EXCELLENT. IN GENERAL, THE DEFLECTIONS ARE DIRECTLY PROPORTIONAL TO LOAD, ALTHOUGH NOT IN ALL CASES. THE DEFLECTIONS WERE MEASURED UNDER BOTH SINGLE-AXLE AND TANDEM- AXLE LOADS AND THE RELATIONSHIP BETWEEN THESE TWO TYPES OF LOADING ARE ESTABLISHED FOR SEVERAL TYPES OF PAVEMENT. LABORATORY METHODS ARE DISCUSSED INCLUDING THE DESIGN OF A RESILIOMETER FOR MEASURING THE RESILIENT CHARACTERISTICS OF SOIL SAMPLES AND THE DESIGN OF A FATIGUE TESTING MACHINE FOR MEASURING THE RELATIVE FLEXIBILITY OF PAVEMENTS. THE STUDY INDICATES THAT A COMPREHENSIVE DESIGN PROCEDURE MUST PROVIDE A PAVEMENT STRUCTURE THAT WILL EITHER BE CAPABLE OF SURVIVING THE FATIGUE RESULTING FROM CONTINUOUS FLEXING OR HAVE SUFFICIENT STIFFNESS TO REDUCE THE FLEXING TO AN ACCEPTABLE VALUE. /AUTHOR/

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrbbulletin/114/114-004.pdf
• Supplemental Notes:
  • No 114, pp 43-87, 56 FIG, 2 TAB, 7 REF 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
• Authors:
  • Hveem, F N
• Discussers:
  • Sutherland, Earl C
  • Campen, W H
  • Williams, Stuart
  • Maner, A W
• Publication Date: 1955

Media Info

• Media Type: Print
• Monograph Title: Design and testing of flexible pavement
• Serial:
  • Highway Research Board Bulletin
  • Issue Number: 114
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Deflection; Deflection tests; Evaluation; Failure; Fatigue tests; Flexible pavements; Laboratory tests; Pavement design; Pavement performance; Pavements; Resilience (Materials); Sampling; Soils; Tandem axle loads; Test procedures; Wheel loads
• Old TRIS Terms: Pavement deflection; Soil sampling
• Subject Areas: Geotechnology; Highways; Pavements;

Filing Info

• Accession Number: 00206967
• Record Type: Publication
• Report/Paper Numbers: No. 114
• Files: TRIS, TRB
• Created Date: Oct 7 1994 12:00AM