TITLE:
Experimental Study on the Mechanical Properties of FRP Bars by Hybridizing with Steel Wires
AUTHORS:
Ji-Hyun Hwang, Dong-Woo Seo, Ki-Tae Park, Young-Jun You
KEYWORDS:
Fiber-Reinforced Polymer (FRP), FRP Hybrid Bar, Tensile Test, Steel Wire
JOURNAL NAME:
Engineering,
Vol.6 No.7,
June
11,
2014
ABSTRACT: Many studies on
fiber reinforced polymer composite bars, as a substitute for reinforcing bars,
have been conducted to solve corrosion of steel in reinforced concrete
structures since 1960s’. However, FRP Bars have a lower elastic modulus than
steel rebar as a structural component of concrete structures. Material
properties with brittleness fracture and low elastic modulus can be improved by
combining cheaper steel than carbon or aramid fibers. In this study, prototypes
of FRP Bars with inserted steel wires (i.e.,
“FRP Hybrid Bars”) were developed and their tensile performance was compared
depending on the proportion and diameter of steel. The FRP Hybrid Bars were
made by dividing them into D13 and D16 according to the diameter and proportion
of inserted wires: GFRPs were combined with wires having different diameters of
0.5 mm, 1.0 mm, and 2.0 mm in the proportion of 10%, 30%, 50%, and 70%,
respectively. As a result of tensile tests, the elastic modulus of FRP Hybrid Bars
were improved as 20% - 190% in comparison with the fully GFRP Bars.