THE DISTRIBUTION OF STRAIN IN THE CONCRETE OF PULLOUT SPECIMENS

EVIDENCE SECURED ON PULLOUT STRAINS IS PRESENTED FOR TWO STRENGTHS OF CONCRETE (NOMINALLY 3000 AND 5000 LB. PER SQ. IN.), AND FOR THREE DIAMETERS OF PLAIN AND DEFORMED RAIL-STEEL BARS (3/8, 5/8, AND 3/4 IN. ROUND). FOR THE PLAIN BAR PULLOUT SPECIMENS, LENGTHS OF EMBEDMENT VARIED FROM 3 TO 4 IN. FOR THE DEFORMED BAR PULLOUT SPECIMENS THERE WERE THREE MINIMUM DEPTHS OF CONCRETE COVER. IN MOST RESPECTS THE PLOTTED DATA ARE STRIKINGLY CONSISTENT. BECAUSE STRAINS WERE MEASURED ONLY AT CONCRETE SURFACES IT IS IMPOSSIBLE TO SHOW QUANTITATIVELY JUST WHAT WAS HAPPENING NEAR THE ADJACENT SURFACES OF STEEL AND CONCRETE, AND THE TESTS, AT BEST, LEAVE SOME QUESTIONS YET TO BE ANSWERED RELATIVE TO THE SPECIFIC DISTRIBUTION OF BOND STRESSES ALONG AN EMBEDDED BAR. THE EVIDENCE DOES DEMONSTRATE AND EMPHASIZE THE PROGRESSIVE NATURE OF BOND RESISTANCE AND ALSO THE SIMILARITY OF ACTION FOR PLAIN AND DEFORMED BARS DURING THE EARLIER STAGES OF LOADING. /AUTHOR/

• Record URL:
  https://onlinepubs.trb.org/Onlinepubs/hrbproceedings/18/18Part1-008.pdf
• Supplemental Notes:
  • Vol 18, Pt 1, PP 114-129, 8 FIG, 2 TAB, 8 REF; part of Report of Department of Design, Committee on Use of High Elastic Limit Steel as Concrete Reinforcement. 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:
  • Gilkey, H J
  • Chamberlain, S J
  • Beal, R W
• Publication Date: 1939

Media Info

• Media Type: Digital/other
• Monograph Title: Proceedings of the Eighteenth Annual Meeting of the Highway Research Board Held at Washington, D.C. November 28-December 2, 1938. Part I
• Serial:
  • Highway Research Board Proceedings
  • Volume: 18
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Bars (Building materials); Bond strength (Materials); Bonding; Concrete; Deformed bars; Physical distribution; Pull out test; Specimens; Strain (Mechanics)
• Old TRIS Terms: Pullout; Strains
• Subject Areas: Bridges and other structures; Freight Transportation; Highways; Materials;

Filing Info

• Accession Number: 00209272
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Jun 1 1971 12:00AM