Experimental study on shear behavior of carbon-fiber-reinforced polymer reinforced concrete short beams without web reinforcement

Abstract

Recent literature emphasized the scarcity of information on the shear behavior of fiber-reinforced polymer (FRP) reinforced concrete short beams and the need to develop sufficient experimental data in this area. The present study responds to this need by conducting shear force testing on eight concrete short beams reinforced with carbon-fiber-reinforced polymer (CFRP) and four control concrete beams reinforced with steel. To ensure a shear failure, all tested beams were reinforced with only bottom longitudinal reinforcement and no web reinforcement was provided. The crack pattern, reinforcement strain, mode of failure, and shear strength and deflection of tested beams were studied. The influence of the shear span to effective depth ratio, a/d, beam effective depth, d, longitudinal reinforcement ratio, ρ, and concrete compressive strength, f ′c on the shear behavior of CFRP-reinforced concrete short beams was examined. It was observed that the experimental parameters investigated had a significant effect on the shear strength and deflection of tested beams. It was also found that the strut-and-tie method more accurately predicts the shear strength of steel-reinforced concrete short beams than it does for similar CFRP-reinforced beams and, thus, needs to be modified to be applicable for reinforced concrete beams with FRP reinforcement.

Shear Behavior and Performance of Deep Beams Made with Self-Compacting Concrete

“…Similar to the NC-100 specimen, sudden failure mode was observed at a load of 715 kN. For all deep beams, flexural cracks in the mid span region within the range of 13-17 % of the ultimate load did not penetrate into the compression zone and stopped at a certain distance from the top of each specimen, since arch action developed at an early load stage in the deep beam, which corresponds to the experimental results by Omeman et al (2008). For all specimens, diagonal shear cracks within the range of 33-41 % of ultimate load appeared at both sides of the layers parallel to the inclined compression strut and extended simultaneously in both directions downward to the support and upward to load positions of the specimens.…”

“…(a) SCC-50 specimen (b) SCC-100 specimen than shear stresses (Omeman et al 2008). Deep beam with 1.0 \ a/d \ 2.5, which developed inclined cracks, are able to carry additional loads by an arch action after a redistribution of internal forces (MacGregor and Wight 2006).…”

“…However, there are limited number of experimental and theoretical studies on shear behavior and the performance of deep beams made with SCC (Londhe 2011;Shah and Modhera 2010). Unlike slender RC structures, the shear capacity of deep beams was transferred by the tied arch behavior or action (Omeman et al 2008). Thus, more systematical experiments and theoretical approaches on shear behavior and performance of the deep beam made with SCC should be made.…”

Neural Network and Adaptive Neuro-Fuzzy Inference System Applied to Civil Engineering Problems

“…From the review of literature ( Deitz, et al, 1999;El-Sayed et al , 2005b, 2006a, 2006b, 2006cGross et al, 2003Gross et al, , 2004Omeman et al, 2008;Razaqpur et al, 2004;Tariq & Newhook, 2003;Tureyen & Frosch, 2002, 2003Wegian & Abdalla , 2005;Yost et al, 2001), a number (74) of shear strength tests are used for developing the ANN and ANFIS as shown in Table B in appendix. All specimens were simply supported and were tested in threepoint loading.…”

Effect of shear span-to-depth ratio on the shear behavior of BFRP-RC deep beams

“…The number of studies on the response of RC structural elements reinforced with FRP bars is rising. Current research on BFRP bars has proven their efficiency in bond durability [1][2] and to reinforce slender beams [3][4]. However, the study of short (deep) beams reinforced with BFRP bars is lacking in literature.…”