BOND STRESS-SLIP RESPONSE OF REINFORCING BARS EMBEDDED IN FRC MATRICES UNDER MONOTONIC AND CYCLIC LOADING

The bond stress versus slip response of reinforcing bars embedded in fiber reinforced cement based composites is investigated. Three types of loading were carried out: monotonic loading, unidirectional cyclic loading (loading-unloading by equal increments of slip), and fully reversed cyclic loading in a pull-pull mode. Two types of failure were observed: a frictional type of pull-out failure and a splitting mode type of failure. Typically, for all applied loading, the failure of all bars embedded in SIFCON matrices was by frictional pullout, while failure of all bars embedded in plain concrete was by splitting of the concrete around the embedded bar. When fiber reinforced concrete was used, a mixed type of failure occurred depending on the test parameters. The confined plain concrete specimens failed by spalling of the concrete outside the confined region (the concrete cover). Generally, in the absence of fibers, failure was rather brittle; the addition of steel fibers resulted in a more ductile failure. Reinforcing bars embedded in SIFCON showed much greater bond strength, higher energy absorption, and maintained substantially larger slips at high stresses, than bars embedded in plain concrete, confined concrete, or fiber reinforced concrete.

• Record URL:
  • http://www.concrete.org/Publications/InternationalConcreteAbstractsPortal.aspx.aspx?m=details&i=502
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/13846957
• Corporate Authors:

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • Hota, S
  • Naaman, A E
• Publication Date: 1997-9

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 525-537
• Serial:
  • ACI Structural Journal
  • Volume: 94
  • Issue Number: 5
  • Publisher: American Concrete Institute (ACI)
  • ISSN: 0889-3241
  • Serial URL: http://www.concrete.org/PUBS/JOURNALS/SJHOME.ASP

Subject/Index Terms

• TRT Terms: Bond strength (Materials); Bonding; Compressive strength; Concrete; Ductility; Energy absorption; Fiber composites; Fiber reinforced concrete; Fracture mechanics; Portland cement; Reinforcing bars; Repeated loads; Slip (Fluid mechanics); Steel fibers
• Uncontrolled Terms: Slip
• Old TRIS Terms: Montonic loading
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00742264
• Record Type: Publication
• Contract Numbers: CSM-9201908
• Files: TRIS
• Created Date: Nov 17 1997 12:00AM