FATIGUE STRENGTH OF HIGH-YIELD REINFORCING BARS

This report is a summary of the essential findings of a study of the fatigue strength of high yield reinforcing bars (generally Grades 60 and 75). A statistically valid experiment was performed employing 353 fatigue tests on concrete beams, each containing one reinforcement bar. Test results were entered in an over-all multiple linear regression analysis. The major effects studied were stress range, minimum stress, bar diameter, type of specimen, grade of bar, and bar geometry. On the basis of the observed behavior, a fatigue design provision was developed for deformed reinforcing bars, suggesting a limitation on the service load stress range.

• Record URL:
  • http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rrd_73.pdf
• 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.
• Corporate Authors:

  Transportation Research Board

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  Washington, DC  United States  20001
• Publication Date: 1975-6

Media Info

• Media Type: Digital/other
• Features: Figures; Tables;
• Pagination: 6 p.
• Serial:
  • NCHRP Research Results Digest
  • Issue Number: 73
  • Publisher: Transportation Research Board

Subject/Index Terms

• TRT Terms: Design; Diameter; Fatigue tests; Geometry; High strength steel; Material reinforcement; Mechanical fatigue; Metal bars; Multiple regression analysis; Regression analysis; Reinforced concrete; Structural analysis; Tensile strength; Yield strength
• Old TRIS Terms: Multiple regression; Test results
• Subject Areas: Data and Information Technology; Design; Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00098289
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Jul 29 1975 12:00AM