THE EFFECT OF SIZE ON THE TORSIONAL STRENGTH OF RECTANGULAR REINFORCED CONCRETE BEAMS

THE TEST RESULTS OBTAINED BY DIFFERENT INVESTIGATORS ARE EXAMINED AND THE DISPARITIES BETWEEN THEM ARE DISCUSSED. THE TENDENCY FOR THE CORNERS OF SECTIONS TO SPALL BECAUSE OF DIAGONAL COMPRESSION FORCES IN THE CONCRETE, AND THE RESULTING DETRIMENTAL EFFECT ON THE SHEAR FLUX PATH, ARE DESCRIBED. IT IS DEDUCED THAT SMALL SECTIONS SUFFER MORE THAN LARGE ONES BECAUSE THE UNCONFINED CONCRETE COVER COMPRISES A RELATIVELY LARGE PART OF THE SECTION. IT IS SHOWN THAT A MODIFIED TRUSS ANALOGY EQUATION MAY BE USED FOR DESIGN, PROVIDED THAT SIZE IS ACCOUNTED FOR BY LIMITING THE NOMINAL TORSIONAL SHEAR STRESS TO A VALUE PROPORTIONAL TO THE MAXIMUM STIRRUP DIMENSION. /TRRL/

  • Supplemental Notes:
    • TECH REPT NO 42.453
  • Corporate Authors:

    Cement and Concrete Association

    52 Grosvenor Gardens
    London SW1W 0AQ,   England 
  • Authors:
    • Swann, R A
  • Publication Date: 1971-3

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: 8 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00208638
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: TRIS
  • Created Date: Jun 28 1972 12:00AM