Abstract:

The aim of this study is to investigate the shear behavior of Fiber Reinforced Polymer (FRP) reinforced members. In this study, Glass, Carbon, Aramid and basalt fibers are used. A total of 220 experimental data are collected from the literature’s review. Only simply supported beams and one-way slabs are considered in this thesis. All the specimens are simply supported.

The most common concrete reinforcement is normal steel reinforcement. In this thesis, the replacement of these steel reinforcements with Fiber Reinforced Polymer (FPR) will be discussed, which is why this thesis will be about comparing the analytical results from five different codes [ACI440.1R-15, GB50608-10, JSCE, CAN/CSA S806-12, BISE-99).

The results show that there are variations in the predictions of the results using different codes. This is because the codes use different approaches to calculate the shear strength. among them, CAN/CSA S806-12 shows better results with a mean value for 𝑽𝑬𝒙𝒑/𝑽𝑪𝒂𝒍 of 1.74, standard deviation of 0.74, and coefficient of variation 42% followed by the GB50608-10 code, with the mean value of 1.59, standard deviation of 1.47, and coefficient of variation 92%. The other three codes, BISE-99, JSCE and ACI440.1R-15 showed the following mean, standard deviation and coefficient of variation of 1.45, 1.43 and 98.78%; 1.75, 1.66 and 94.68%; 2.39, 2.22 and 92.62%, respectively. These results include 7 beams with depth of 880 mm and higher, which showed significantly higher values of 𝑽𝑬𝒙𝒑/𝑽𝑪𝒂𝒍. When these beams are excluded from the results (total 213 beams), the results show a noticeable improvement over the aforementioned ones.

The Finite Element Analysis with the use of ANSYS 2020R2 was done on 11 beams where, six (6) of these beams are reinforced with Glass Fiber Reinforced Polymers (GFRP) while the other five (5) beams are reinforced with Carbon Fiber Reinforced Polymers (CFRP). The FEA shows reasonable results. The average, standard deviation and COV of the predicted and experimental values for the cracking force are 0.87, 0.28 and 32.07%, and for the displacement at mid span are 1.29, 0.42 and 32.68%, respectively.