TESTS OF LARGE-DIAMETER REINFORCED-CONCRETE PIPE

THE THREE-EDGE BEARING TEST IS THE STANDARD TEST IN GENERAL USE FOR CONCRETE PIPE OF ALL SIZES TO DETERMINE THE LOAD TO PRODUCE A 0.01-INCH-CRACK AND THE LOAD TO PRODUCE ULTIMATE FAILURE. RELATIVELY FEW SUCH TESTS HAVE BEEN PERFORMED ON PIPE LARGER THAN 72 INCHES IN DIAMETER, PARTLY DUE TO THE LACK OF EQUIPMENT WITH CAPACITY TO HANDLE THE LARGE PIPE, AS WELL AS THE COST OF MANUFACTURING AND TESTING THE PIPE TO DESTRUCTION. TESTS ON 84-INCH REINFORCED- CONCRETE PIPE INDICATE THAT SOME TYPE OF REINFORCEMENT IS NEEDED TO PREVENT A SHEAR FAILURE IN THE LARGER SIZES OF PIPE IF THE FULL STRENGTH OF THE PIPE IS TO BE DEVELOPED. VARIOUS SYSTEMS FOR REINFORCING THE PIPES WERE USED INCLUDING STANDARD TYPES. TEST RESULTS INDICATE THAT A MAJOR FACTOR CAUSING THE DISCREPANCY BETWEEN TEST RESULTS AND EXPECTED THEORETICAL RESULTS HAS BEEN THE FAILURE TO CONSIDER SHEARING STRESSES SET UP IN WALL OF THE PIPE. FAILURE DUE TO SHEARING STRESS OCCURS BEFORE THE TENSION REINFORCEMENT HAS BEGUN TO CARRY ITS DESIGN LOAD, PARTICULARLY IN HEAVILY REINFORCED PIPE. IF SPECIAL REINFORCEMENT IS PROVIDED TO TAKE CARE OF SHEARING STRESSES, THE STRENGTH OF THE TENSION REINFORCEMENT CAN BE USED MORE EFFICIENTLY. IT IS POSSIBLE TO GRADE THE INCREASED ENCROACHING STRENGTH OF LARGE DIAMETER PIPE WITHOUT AN INCREASE IN THE WALL THICKNESS. IT IS CONCLUDED THAT BETTER METHODS OF SHEAR REINFORCEMENT SHOULD BE DEVELOPED.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrbbulletin/102/102-001.pdf
• Supplemental Notes:
  • No 102, pp 1-11, 9 FIG, 2 TAB, 7 PHOT, 6 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:
  • Hendrickson Jr, John G
• Publication Date: 1955

Media Info

• Media Type: Digital/other
• Pagination: 11p
• Monograph Title: Tests on large culvert pipe
• Serial:
  • Highway Research Board Bulletin
  • Issue Number: 102
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Bearing capacity; Bearing tests; Diameter; Failure; Material reinforcement; Reinforced concrete pipe; Shear stress
• Old TRIS Terms: Shear failures
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00216760
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Apr 21 1994 12:00AM