SPLITTING CRACKS ALONG THE MAIN REINFORCEMENT IN CONCRETE MEMBERS

RESULTS OF A STUDY OF THE FUNDAMENTAL CONCEPTS INVOLVED IN THE SPLITTING ALONG THE MAIN REINFORCEMENT OF CONCRETE MEMBERS ARE PRESENTED. THE EXPERIMENTAL PARTS OF THE INVESTIGATION INCLUDED THE FOLLOWING TEST SERIES: (1) CONCENTRIC PULLOUT TESTS, (2) ECCENTRIC PULLOUT TESTS, (3) BEAM-END TESTS, AND (4) AGGREGATE INTERLOCKING TESTS. THE ANALYTICAL INVESTIGATION CONSISTED OF FINITE ELEMENT ANALYSES OF AXISYMMETRIC MODELS AND BEAM-END SEGMENTS. SOME OF THE MAIN CONCLUSIONS OF THE STUDY WERE: (1) THE DOWEL FORCE IS THE MOST IMPORTANT FACTOR PRODUCING SPLITTING IN BEAMS WITHOUT STIRRUPS, (2) AGGREGATE INTERLOCKING ALONG DIAGONAL TENSION CRACKS CARRIES A SUBSTANTIAL PORTION (AS MUCH AS 40 TO 50%) OF THE SHEAR IN A BEAM, (3) A STIRRUP CLOSE TO THE DIAGONAL TENSION CRACK IS VERY EFFECTIVE IN POSTPONING OR PREVENTING DOWEL SPLITTING, AND (4) WEDGING ACTION OF THE REINFORCEMENT PRODUCES HIGH CIRCUMFERENTIAL AND RADIAL STRESSES AROUND THE BAR AT TRANSVERSE CRACKS. THE VARIOUS THEORETICAL ANALYSES PROVIDED STRESS, CRACKING, AND DISPLACEMENT DISTRIBUTIONS THAT EXPLAINED THE BEHAVIOR OF THE SPECIMENS AND AGREED WITH THE EXPERIMENTAL DATA. /BPR/

  • Supplemental Notes:
    • Adm ContracT, CPR 11-3627
  • Corporate Authors:

    Cornell University

    School of Civil and Environmental Engineering
    Ithaca, NY  United States  14853

    New York State Department of Transportation

    1220 Washington Avenue
    Albany, NY  United States  12232

    Bureau of Public Roads /US

    400 7th Street, SW
    Washington, DC  United States  20590
  • Authors:
    • Gergely, P
  • Publication Date: 1969-2

Subject/Index Terms

Filing Info

  • Accession Number: 00212058
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS, STATEDOT
  • Created Date: Sep 22 1994 12:00AM