Abstract
The major cause of concrete structures deterioration is steel corrosion. Consequently, this situation has led researchers to study and test other reinforcement alternatives that are noncorrosive in nature. Rapidly emerging developments in the field of material technology has led to the development of fiber reinforced polymers (FRP). This research focuses on the flexural behavior of carbon, glass, aramid, and basalt (CFRP, GFRP, AFRP, and BFRP) fiber reinforced polymers bars as alternatives to the traditional steel reinforcement in concrete. The study involves a nonlinear numerical finite element analysis of a simply supported reinforced concrete beams subjected to cyclic loading, where the ANSYS program is utilized. The numerical model verification is executed on the experimental beams for ensuring the efficiency of ma-terial models, cyclic loading and various elements. Hysteresis curves are produced for each beam and analyzed, where loads, deflections, and cracks propagation are inspected and discussed. The results reveal that, the full replacement of traditional steel bars with CFRP bars gives the greatest increase in the ultimate load capacity by 38.5%. Also, other results are summarized in this paper.Â
Highlights
It is well known that concrete is a building material with its relatively high compressive strength as compared to its low tensile strength
Other researchers [10],[11] have studied the performance of glass fiber reinforced polymer (GFRP) beams, their findings indicate that the loads deflection curves were linear, Tension failure in the GFRP reinforcement was characterized by the rupture of GFRP bars at the region of maximum bending moment, and the use of small diameter bars exhibit better deflection properties than large diameter bars for the same reinforcement ratio
The ultimate load for the beams reinforced by carbon fiber reinforced polymer (CFRP) bars was larger than the ultimate load for the beams reinforced by GFRP bars
Summary
It is well known that concrete is a building material with its relatively high compressive strength as compared to its low tensile strength. As well others [13] have studied the flexural behaviors of hybrid concrete beams reinforced with BFRP bars and steel bars and beams performance with hybrid reinforcement of CFRP or GFRP bars and steel bars were studied [14], [15]. Comparative research between carbon and glass fiber reinforced polymers [16], [17] indicate that both GFRP and CFRP bars behaved linearly up to failure due to their linear characteristics as of their low modulus of elasticity as compared to that of steel. Some researches discussed the replacement of traditional steel bars with one or two types of FRP bars under the effect of cyclic load for reinforced concrete beams. This research paper studies the structural flexural behavior of four different fiber reinforced materials used in reinforcing concrete beams (carbon, glass, aramid, and basalt) when subjected to cyclic loading. The results are compared to each other and to those of a beam with traditional steel reinforced beam
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