Title:
Bond of Hooked GFRP Rebars to Concrete
Author(s):
M. R. Ehsani, H. Saadatmanesh, and S. Tao
Publication:
Materials Journal
Volume:
92
Issue:
4
Appears on pages(s):
391-400
Keywords:
bonding; fibers; glass; plastics, polymers, and resins; reinforced concrete; reinforcing steels; Materials Research
DOI:
10.14359/974
Date:
7/1/1995
Abstract:
The objective of this study was to determine the bond behavior of hooked glass fiber reinforced plastic (GFRP) reinforcing bars to concrete. Thirty-six 90 F hooked rebar specimens were tested to examine the effects of concrete compressive strength, radius of bend, tail length, straight embedment length, and rebar diameter under monotonic static loading. The slip between the rebars and concrete was measured at the loaded end for various load levels. The tensile load was applied to the rebar until splitting of concrete or fracture of rebar occurred. The test results indicated that, with increases in concrete compressive strength, radius of bend, and straight embedment length, the ultimate tensile stress and initial stiffness increased, and the maximum slip at failure decreased. The tail length beyond 12 bar diameters had little effect on the ultimate tensile stress. Based on a regression analysis of the test results, it is recommended that the development length of hooked GFRP bars be 16 times the bar diameter.