HIGH-STRENGTH REINFORCING STEELS FOR CONCRETE BRIDGES

THE USE OF HIGH-STRENGTH DEFORMED BARS WITHOUT PRESTRESSING IN EUROPEAN CONCRETE STRUCTURES IS REVIEWED, WITH PARTICULAR EMPHASIS ON BRIDGE CONSTRUCTION. AMERICAN USE OF HIGH-STRENGTH REINFORCEMENT HAS SO FAR INCLUDED ONLY BUILDINGS. HOWEVER, ASTM SPECIFICATIONS FOR 60,000- AND 75,000-PSI YIELD POINT REINFORCEMENT HAVE RECENTLY BEEN ISSUED, AND AN INCREASING FUTURE USE IN BRIDGE STRUCTURES MAY BE EXPECTED. TO SUPPLEMENT OTHER RESEARCH INFORMATION, CHIEFLY FROM ABROAD, ON RECTANGULAR BEAMS REINFORCED WITH COLD-TWISTED STEEL, 42 T-BEAMS REINFORCED WITH METALLURGICALLY PRODUCED HIGH-STRENGTH STEELS HAVE BEEN TESTED AT CORNELL UNIVERSITY. TO SIMULATE CONTINUITY, THESE WERE SINGLE-SPAN BEAMS WITH OVER-HANGS. YIELD POINTS RANGED FROM 84,000 TO 103,000 PSI. THE TESTS SHOWED THAT THE STRENGTHS AND DEFLECTIONS OF THESE BEAMS CONFORMED TO ACCEPTED THEORIES WITH ABOUT THE SAME AGREEMENT AS FOR MEMBERS WITH CONVENTIONAL STRENGTH REINFORCEMENT. CRACK WIDTH AT DESIGN LOADS CAN BE HELD WITHIN ACCEPTABLE LIMITS IF ADEQUATE ATTENTION IS GIVEN TO DETAILING. /AUTHOR/

  • Supplemental Notes:
    • Vol 39, pp 103-119, 7 FIG, 3 TAB, 5 PHOT, 16 REF
  • Authors:
    • Hognestad, E
    • Winter, G
    • Mavis, F T
    • Greaves, M J
  • Publication Date: 1960

Media Info

  • Monograph Title: Proceedings of the Thirty-Ninth Annual Meeting of the Highway Research Board, Washington, D.C., January 11-15, 1960
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00209480
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 29 1971 12:00AM