ANALYSIS OF REINFORCED FIBROUS CONCRETE BEAMS

A method has been developed to predict the ultimate strength of concrete beams reinforced with a combination of steel bars and randomly distributed steel fibers. Strengths of three full-size beams were obtained experimentally to verify the analytical method. The method, which applies to beams using a cement-rich mortar mix with the steel fibers, shows good correlation with experimental results. A dynamic bond stress of 333 psi was assumed for the fibers. Fiber lengths were from 1-1/2 in. to 2-1/4 in. and the fiber amount was varied from 1.22, to 1.51, by volume. The test programs showed that: (1) Steel fibrous concrete increased the flexural load capacity of the reinforced beams by about 25,; (2) crack width and crack spacing were less than in a conventional reinforced beam; and (3) the post-cracking stiffness of the fibrous beams was greater than a conventional beam.

• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Henager, C H
  • Doherty, T J
• Publication Date: 1976-1

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 177-188
• Serial:
  • Journal of the Structural Division
  • Volume: 102
  • Issue Number: ST 1
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Beams; Fiber reinforced concrete; Material reinforcement; Reinforced concrete; Stiffness; Ultimate strength
• Uncontrolled Terms: Reinforced concrete beams
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00135053
• Record Type: Publication
• Report/Paper Numbers: ASCE #11847
• Files: TRIS
• Created Date: Aug 11 1976 12:00AM