was studied. Compressive, and splitting tensile strengths were used to investigate the mechanical properties of concrete containing ground granulated blast furnace slag (GGBFS) at 28 days of age. GGBFS was used in the form of weight percentages instead of cement (0, 30,
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was studied. Compressive, and splitting tensile strengths were used to investigate the mechanical properties of concrete containing ground granulated blast furnace slag (GGBFS) at 28 days of age. GGBFS was used in the form of weight percentages instead of cement (0, 30, 40, and 50%). The results of the experiments were used to simulate the properties of concrete materials in ABAQUS software. According to the results, the compressive and splitting tensile strengths of the specimen with 30% GGBFS were 10% and 5.02% higher than those of the control specimen. Then 12 concrete beams were simulated in ABAQUS software. The effect of bar type (steel and GFRP), the ratio of longitudinal reinforcement, and the mechanical properties of concrete with and without GGBFS were investigated. The results showed that increasing the ratio of GFRP longitudinal reinforcement in beams without GGBFS caused a significant increase in the load-bearing capacity up to 21.89% and a decrease in the central displacement of the beams up to 15.10%. Also, the use of steel bars with the same ratio of longitudinal reinforcement as GFRP bars achieved better results (an increase of 29.38% in bearing capacity and a decrease of 35.15% in the central displacement of the specimens). It should be noted that the values of the bearing capacity and central displacement of the simulated specimens were compared with the corresponding values in the relations provided in the ACI 440.1R-15 guide.
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