DESIGN OF CONCRETE MEMBERS SUBJECTED TO UNIAXIAL BENDING AND COMPRESSION USING REINFORCEMENT SIZING DIAGRAMS

This article describes a new approach to the sizing of reinforcement in members subjected to combined flexure and axial load. Rather than using analysis to determine a neutral axis depth for a given configuration of reinforcement, the reinforcement required to provide adequate strength is determined as a function of the neutral axis depth. Acceptable combinations of top and bottom reinforcement are plotted as a function of the neutral axis depth on a new diagram, termed a reinforcement sizing diagram (RSD). The authors describe how the RSD provides the engineer with a new tool for selecting reinforcement to achieve design objectives, including minimizing total reinforcement or accounting for compression reinforcement that may be used to facilitate construction. The authors present several examples, illustrating their technique according to the assumptions adopted in the provisions of ACI 318 and Eurocode 2. The authors illustrate the effects of optimal reinforcement on the axial load-moment interaction diagram for one sample situation.

  • Availability:
  • Supplemental Notes:
    • For this issue of the ACI Structural Journal, the date is January/February 2005.
  • Corporate Authors:

    American Concrete Institute (ACI)

    38800 Country Club Drive
    Farmington Hills, MI  United States  48331
  • Authors:
    • Hernandez-Montes, E
    • Gil-Martin, L M
    • Aschheim, M
  • Publication Date: 2005-1

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00985156
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 31 2005 12:00AM