Strength and deformability of concrete beams reinforced by non-metallic fiber and composite rebar

Abstract

Strength and deformability of concrete beams reinforced by non-metallic fiber and composite rebar Abstract. Production of durable and high-strength concrete structures with unique properties has always been crucial. Therefore special attention has been paid to non-metallic composite and fiber reinforcement. This article describes the experimental research of strength and deformability of concrete beams with dispersed and core fiber-based reinforcement. As composite reinforcement fiberglass reinforced plastic rods with diameters 6 mm and 10 mm are used. Carbon and basalt fibers are used as dispersed reinforcement. The developed experimental program includes designing and production of flexural structures with different parameters of dispersed fiber and composite rebar reinforcement. The preliminary testing of mechanical properties of these materials has shown their effectiveness. Structures underwent bending testing on a special bench by applying flexural static load up to complete destruction. During the tests vertical displacements were recorded, as well as value of actual load, slippage of rebars in concrete, crack formation. As a result of research were obtained structural failure and crack formation graphs, value of fracture load and maximum displacements of the beams at midspan. Analysis of experimental data showed the effectiveness of using dispersed reinforcement of concrete and the need for prestressing of fiberglass composite rebar.

Durability of beams with hybrid reinforcement from metal and basalt fiber reinforced polymer (BFRP) armature

“…Thus, in [8], it is stated that the deflections and width of cracks in bended samples, reinforced by composite armature, were 60% higher than those reinforced by metal reinforcement, at a stress level of 70% of the destructive one. Similar results were obtained in the works [2][3][4][5][6][7][8][9][10]11].…”

“…Composite reinforcement is known to possess high tensile strength, but a lower modulus of elasticity as compared with steel [1][2][3]. It was found [2][3][4][5][6][7][8] that the experimental samples showed a significant increase in durability, by 25-90%, vs. the samples reinforced by metal armature. Due to the low modulus of elasticity, the deformability of the samples reinforced by BFRP was higher.…”

Comparative Performance Analysis of Small Concrete Beams Reinforced with Steel Bars and Non-Metallic Reinforcements

“…Recently, numerous studies have explored the intricate properties of fiber-reinforced polymer (FRP)-reinforced concrete beams, as evidenced by a growing body of research [14][15][16][17]. Many of these investigations have focused on the behavior of concrete beams that are reinforced with a single type of fiber reinforcement, comparing their performance against that of conventional steel-reinforced concrete beams [16][17][18][19][20][21][22].…”

Numerical and experimental studies of bent elements of basalt fiber reinforced concrete with prestressed glass composite reinforcement under static and short-term dynamic loads

“…This program included the tests of concrete beams with a span of 2000 mm and a rectangular cross-section of 100 * 200 mm under static and shortterm dynamic loads. The pre-stressing level σfp = 0 ... 0.45 Rf and the coefficient of basaltfiber reinforcement µbf = 0 ... 0.5% by weight of cement were varied [11,12].…”