BOND STRENGTH STUDY OF HOLLOW COMPOSITE REBARS WITH DIFFERENT MICRO STRUCTURE

The results of bond and tensile strength investigations of hollow glass-fiber reinforced plastic (GFRP) rebars are presented. Rebars with similar geometry but different micro structure were evaluated. Bond characteristics of on-and off-axis specimens, in terms of maximum sustained load, bond strength and stress, concrete compressive strength and initial bond stress are reported. Two different procedures for evaluating of the bond strength were used. The results of the well known pull-out tests are compared to these obtained by a newly developed test method. It appears that the compressive strength of the concrete has no influence on bond strength and stress performance of the composite reinforcement investigated herein. In order to confirm the experimental results a computer simulation of the rebar's behavior was performed. The results of this study suggest that the micro structure of the composite bars is a significant factor influencing the bond performance. The specimens reinforced with unidirectional glass fibers showed higher bond strength than off-axis fiber-reinforced specimens.

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• Corporate Authors:

  University of Arizona, Tucson

  Drachman Institute, 819 E First Street
  Tucson, AZ  United States  85721

  University of Arizona, Tucson

  Department of Civil Engineering and Engineering Mechanics
  1209 E 2nd Street
  Tucson, AZ  United States  85721-0072

  University of Arizona, Tucson

  Transportation and Traffic Institute
  Tucson, AZ  United States  85721
• Authors:
  • Kachlakev, D I
  • Lundy, J R
• Conference:
  • Second International Conference on Composites in Infrastructure
  • Location: Tucson, Arizona
  • Date: 1998-1-5 to 1998-1-7
• Publication Date: 1998-1

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 1-14
• Serial:
  • Volume: 2

Subject/Index Terms

• TRT Terms: Adhesive bond strength; Composite materials; Compressive strength; Concrete; Glass fiber reinforced plastics; Loads; Microstructure; Reinforcing bars; Simulation; Stresses; Tensile strength
• Uncontrolled Terms: Hollow
• Subject Areas: Geotechnology; Highways; Materials; I35: Miscellaneous Materials;

Filing Info

• Accession Number: 00763896
• Record Type: Publication
• ISBN: 189074302X
• Files: TRIS
• Created Date: May 7 1999 12:00AM