EFFECTIVENESS FACTOR OF CONCRETE IN CONTINUOUS DEEP BEAMS

The authors present an upper-bound analysis of continuous reinforced-concrete deep beams. The concrete is assumed as a rigid-perfectly plastic material obeying the modified Coulomb failure criteria with zero tension cutoff. Two failure modes are examined, each idealized as an assemblage of rigid blocks moving in plane, separated by yield zones. These zones are idealized as lines, the limiting case of narrow zones of failing material undergoing very high strains. The value of the effectiveness factor for concrete in compression for this type of structure is obtained from calibration of the calculated failure loads against the experimental failure loads for 20 test beams. The effectiveness factor can vary with the concrete strength and the amount of web reinforcement, but this provides little improvement over the adoption of a uniform value. The effect of the horizontal and vertical web reinforcement on the load capacity is mainly influenced by the shear span to depth ratio. The deeper the beam, the less effective the vertical web reinforcement and the more effective the horizontal web reinforcement.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/07339445
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Ashour, A F
  • MORLEY, C T
• Publication Date: 1996-2

Language

• English

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 169-178
• Serial:
  • Journal of Structural Engineering
  • Volume: 122
  • Issue Number: 2
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9445
  • Serial URL: http://ascelibrary.org/loi/jsendh

Subject/Index Terms

• TRT Terms: Compressive strength; Failure; Material reinforcement; Measures of effectiveness; Mechanical strain; Reinforced concrete; Structural members
• Uncontrolled Terms: Capacity; Effectiveness; Horizontal; Vertical
• Old TRIS Terms: Continuous deep beams; Failure mode; Strains; Web reinforcement
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00716527
• Record Type: Publication
• Files: TRIS
• Created Date: Feb 25 1996 12:00AM