Evaluation of bond using FRP rods with axisymmetric deformations

Mesfer M. Al-Zahrani, Salah U. Al-Dulaijan, Antonio Nanni, Charles E. Bakis, Thomas E. Boothby

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

This paper presents experimental results obtained with the direct pull-out test using machined and wrapped glass/vinylester, carbon/vinylester, and carbon/epoxy FRP rods with axisymmetric lugs. The typical results are given as nominal shear stress vs. free- and loaded-end slip. Experimental results obtained from strain probes used during the pull-out test are presented as shear stress vs. strain. Machined glass/vinylester FRP rods with embedded lengths including five and 10 lugs, and different lug widths and heights were studied. The failure mode consisted of the shearing off of the lugs without concrete damage. Four concrete mixtures with strengths ranging from 32 to 66.1 MPa were examined. Provided that enough confinement is used, it was found that the concrete strength has no noticeable effect on the shear strength and failure mode of FRP rods. Results showed that the FRP-concrete bond is controlled by the lug dimension and shear strength of the resin. The shear strength of the wrapped lugs is less than that of machined ones due to fiber orientation and weaker interfacial bond between the wrapped strands and rod surface.

Original languageEnglish
Pages (from-to)299-309
Number of pages11
JournalConstruction and Building Materials
Volume13
Issue number6
DOIs
StatePublished - Sep 1 1999
Externally publishedYes

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Shear strength
Concretes
Failure modes
Shear stress
Carbon
Glass
Concrete mixtures
Fiber reinforced materials
Shearing
Resins

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Materials Science(all)

Cite this

Evaluation of bond using FRP rods with axisymmetric deformations. / Al-Zahrani, Mesfer M.; Al-Dulaijan, Salah U.; Nanni, Antonio; Bakis, Charles E.; Boothby, Thomas E.

In: Construction and Building Materials, Vol. 13, No. 6, 01.09.1999, p. 299-309.

Research output: Contribution to journalArticle

Al-Zahrani, Mesfer M. ; Al-Dulaijan, Salah U. ; Nanni, Antonio ; Bakis, Charles E. ; Boothby, Thomas E. / Evaluation of bond using FRP rods with axisymmetric deformations. In: Construction and Building Materials. 1999 ; Vol. 13, No. 6. pp. 299-309.
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