Abstract
The addition of epoxy bending plate to the tension and compression faces or web is an effective technique for flexural or shear strengthening of reinforced concrete beams, also using of steel fibers with concrete improves the structural behavior and increases the moment capacity and shear resistance of the beams. General equations are derived for predicting the bending moment capacity, maximum and balancing reinforcement ratio the equivalent depth of the compression zone for singly and doubly reinforced rectangular sections and T-beams. The results indicate that bending moment capacity increased in beams with steel fibers and composite plates, while the maximum balancing reinforcement ratios are decreased.
Highlights
Reinforced concrete beams with (FRP) bars are used instead of steel reinforcement in many cases to overcome the problems of corrosion and electromagnetic interference because FRP are made from fibers embedded in a polymeric resin
American Concrete Institute (ACI) presented a guideline for structural concrete reinforced with FRP bars
The philosophy of the design is based on the concept that concrete and FRP materials are brittle; the failure mechanisms are based on the concrete crushing or FRP rupture
Summary
Reinforced concrete beams with (FRP) bars are used instead of steel reinforcement in many cases to overcome the problems of corrosion and electromagnetic interference because FRP are made from fibers embedded in a polymeric resin. FRP materials have a high tensile strength in the direction of the fibers, which can be used as a structural reinforcement. The Japan Society of Civil Engineers (JSCE) [1] modified the Japanese steel-reinforced concrete code for FRP reinforced concrete. American Concrete Institute (ACI) presented a guideline for structural concrete reinforced with FRP bars. The philosophy of the design is based on the concept that concrete and FRP materials are brittle; the failure mechanisms are based on the concrete crushing or FRP rupture
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