THE EFFECT OF STIFFNESS RATIO ON PAVEMENT STRESS ANALYSIS

AN ANALYSIS IS PRESENTED OF THE TYPES AND MAGNITUDES OF STRESSES AND DEFORMATIONS INDUCED IN A PAVEMENT SYSTEM, AND THEIR EFFECT ON PROBLEMS OF DESIGN. SOLUTIONS OBTAINABLE THROUGH IDEALIZED ELASTIC THEORY ARE PROJECTED TO THE CASE OF ACTUAL MATERIALS IN THE LIGHT OF THE VISCO-ELASTIC THEORY. SPECIFICALLY, THE PAPER CONSIDERS THE EFFECT ON PAVEMENT STRESSES AND DEFLECTIONS OF VARIATIONS IN (1) PAVEMENT THICKNESS, (2) THE MODULUS OF ELASTICITY OF PAVEMENT AND SUBGRADE, AND (3) TIME EFFECTS. THE SIGNIFICANCE OF THE CONCEPT OF STIFFNESS RATIO (THE STIFFNESS OF THE PAVEMENT RELATIVE TO THAT OF THE SUBGRADE) IS EXAMINED AND THE BASIC SIMILARITIES IN THE DESIGN OF RIGID AND FLEXIBLE PAVEMENTS, AS PROPOSED BY WESTERGAARD AND BURMISTER, ARE ANALYZED. THE PAPER ALSO CONTAINS RESULTS OF A PRELIMINARY LABORATORY INVESTIGATION DESIGNED TO CONSIDER THE EFFECTS OF STIFFNESS RATIO ON THE STRESSES INDUCED IN THE PAVEMENT, AND ON THE SHAPE OF THE DEFLECTION CURVE. OTHER FACTORS SUCH AS TIME RATE OF LOADING AND REBOUND, AS WELL AS THE CONTRIBUTION OF ACCUMULATED PERMANENT DEFORMATION ON FATIGUE, ARE CONSIDERED. /AUTHOR/

• Record URL:
  https://onlinepubs.trb.org/Onlinepubs/hrbproceedings/39/39-008.pdf
• Supplemental Notes:
  • Vol 39, pp 61-85, 13 FIG, 4 TAB, 37 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:
  • Baker, R F
  • Papazian, H S
• Publication Date: 1960

Media Info

• Media Type: Digital/other
• Monograph Title: Proceedings of the Thirty-Ninth Annual Meeting of the Highway Research Board, Washington, D.C., January 11-15, 1960
• Serial:
  • Highway Research Board Proceedings
  • Volume: 39
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Deflection; Deformation; Elasticity (Mechanics); Fatigue (Physiological condition); Flexible pavements; Loads; Pavement design; Pavements; Rigid pavements; Stiffness; Structural analysis; Viscoelasticity
• Uncontrolled Terms: Loading rate
• Old TRIS Terms: Elastic theory; Pavement deflection
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 00207357
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Aug 29 1971 12:00AM