Tests are reported on the shear behavior of T beams with varying amounts of web reinforcement. It is shown that the effectiveness of web reinforcement in increasing the shear resistance or controlling the diagonal crack width does not vary linearly. Further, the minimum amount of web steel to be effective varies with the moment-shear ratio. The load carried by a stirrup is shown to be dependent on its position relative to the failure crack. Part of the shear carried by stirrups is transferred to them through aggregate interlock and dowel action. To ensure that every potential shear crack is contained, to achieve ductile failure and to preserve the integrity of a beam, more web reinforcement is required than for achieving the flexural load capacity. Further, the maximum distance between a stirrup and a support or load point should not be greater than 0.75 x effective depth. The provisions of cp 110 for the shear resistance of reinforced beams may not be adequate for the satisfactory performance of T beams. /AUTHOR/

Media Info

  • Features: Figures; References;
  • Pagination: p. 35-49
  • Serial:
    • Volume: 57
    • Issue Number: 2

Subject/Index Terms

Filing Info

  • Accession Number: 00263990
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Jan 9 1975 12:00AM