THE INFLUENCE OF SECTION BREADTH ON ROTATION CAPACITY

A series of 78 prisms of plain concrete was tested in a special test rig simulating a portion of an under-reinforced beam. The prisms were allowed to crack and the influence of the tension concrete below the neutral axis was included. Prisms having different breadth/depth ratios were tested to quantify the difference in behaviour between broad "slab" type sections and narrow "beam" -type sections. Two series of under-reinforced beams were tested to confirm the results obtained from the prism tests. It is concluded that the breadth/depth ratio of a rectangular section is a major variable governing its rotation capacity under ultimate conditions. Some further testing is suggested to investigate this parameter in respect of t, i and box beams. It is further concluded that there should be no problems in regard to ductility in solid slabs designed in accordance with yield-line theory. (Author/TRRL)

  • Availability:
  • Corporate Authors:

    Cement and Concrete Association

    Wexham Spring
    Slough SL3 6PL, Buckinghamshire,   England 
  • Authors:
    • Clements, S W
    • Cranston, W B
    • SYMONS, M G
  • Publication Date: 1980-9

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: 27 p.
  • Serial:
    • CBI FORSK/RES
    • Issue Number: 533
    • Publisher: Cement and Concrete Research Institute
    • ISSN: 0346-6906

Subject/Index Terms

Filing Info

  • Accession Number: 00396265
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0 7210 1194 2
  • Report/Paper Numbers: Monograph
  • Files: ITRD, TRIS
  • Created Date: Jan 31 1986 12:00AM