WARPING STRESSES AND DEFLECTIONS IN CONCRETE PAVEMENTS

A NEW THEORY HAS BEEN DEVELOPED WHEREBY THE STRESSES AND DEFLECTIONS IN CONCRETE PAVEMENTS SUBJECT TO TEMPERATURE AND MOISTURE GRADIENTS CAN BE COMPUTED FOR THE GENERAL CONDITION THAT WARPING IS SUFFICIENT TO RAISE A PORTION OF THE SLAB OFF ITS SUPPORT. THE EXTENT OF THE SUPPORT CAN ALSO BE DETERMINED. SOLUTIONS TO THE RESULTING EQUATIONS WERE PROGRAMMED FOR THE DIGITAL COMPUTER AND MONOGRAPHS WERE PREPARED GIVING RATIOS OF THE CRITICAL STRESS TO THE MODULUS OF RUPTURE FOR A WIDE RANGE OF ENVIRONMENTAL GRADIENTS, AND FOR VARIOUS COMBINATIONS OF SLAB SIZES AND THICKNESSES. COMPARISONS WITH AVAILABLE MEASUREMENTS SHOW GOOD AGREEMENT BETWEEN OBSERVED AND COMPUTED DEFLECTIONS. TYPICAL CRACKING PATTERNS OBSERVED IN CONCRETE PAVEMENTS CAN READILY BE EXPLAINED. THE NEW THEORY IS COMPLETELY RATIONAL AND HAS BEEN EXTENDED TO INCLUDE A VARIETY OF SUPERIMPOSED LOADINGS COMBINED WITH THE EFFECTS OF WARPING PRODUCED BY TEMPERATURE AND MOISTURE GRADIENTS. FOR THE SPECIAL CASE (NEVER CRITICAL IN PRACTICE) WHERE WARPING IS SUFFICIENTLY SMALL THAT THE PAVEMENT MAINTAINS FULL CONTACT WITH ITS SUPPORT, THE GENERAL THEORY REDUCES TO THAT OF WESTERGAARD. /AUTHOR/

• Record URL:
  https://onlinepubs.trb.org/Onlinepubs/hrbproceedings/38/38-014.pdf
• Supplemental Notes:
  • Vol 38, pp 286-320, 13 FIG, 1 TAB, 78 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:
  • Harr, M E
  • Leonards, G A
• Publication Date: 1959

Media Info

• Media Type: Digital/other
• Monograph Title: Proceedings of the Thirty-Eighth Annual Meeting of the Highway Research Board, Washington, D.C., January 5-9, 1959
• Serial:
  • Highway Research Board Proceedings
  • Volume: 38
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Computer programs; Concrete pavements; Deflection; Equations; Modulus of rupture; Moisture content; Nomographs; Pavement performance; Pavements; Stresses; Temperature gradients; Theory; Warpage
• Old TRIS Terms: Pavement deflection; Warping (Concrete pavements)
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 00207354
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Sep 19 1971 12:00AM