BOND STRENGTH AND LOAD DISTRIBUTION OF COMPOSITE GFRP REINFORCING BARS IN CONCRETE

The objective of this investigation was to examine the bond strength of glass fiber reinforced plastic (GFRP) reinforcing bars in concrete. Twenty concrete beams reinforced with four nominal diameters from 12.7 to 25.4 mm of GFRP and steel reinforcing bars were tested to determine the bond strength of GFRP reinforcing bars in comparison with steel reinforcing bars. Additionally, the distribution of tensile and bond stresses along the embedment length of GFRP reinforcing bars was studied by five pullout tests using instrumented 19.1-mm-diameter GFRP reinforcing bars compared with steel reinforcing bars in concrete. Only one type of GFRP reinforcing bar was used in this study. Test results reveal that the diameter effect on bond observed for steel reinforcing bars is also present for GFRP reinforcing bars. The bond strength of GFRP bars is lower than that of steel reinforcing bars. The bond strength from beam tests is lower than that from pullout tests. Furthermore, it was found that the distribution of bond stress along the embedment length of GFRP reinforcing bars is nonlinear.

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  • English

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Filing Info

  • Accession Number: 00724426
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 13 1996 12:00AM