Numerical And Experimental Study On Shear Strength Of High Strength Reinforced Concrete
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Abstract
Shear strength of concrete is a vital consideration in the analysis and design of structures, as its failure occurs abruptly and can result in catastrophic consequences. In the current study, two different grades of reinforced concrete beams were examined, each with three shear span-to-depth ratios (a/d) of 1, 2, and 3. The beams were both cast and experimentally tested. Additionally, numerical simulations of the beams were conducted using the ATENA software to model and analyze their performance. In ATENA, the material for concrete was assigned using the cementitious2 and cementitious2-user models. The cementitious2 model includes the Euro-Code and Model-Code as default models, both of which were utilized in the study to determine the shear strength of reinforced concrete beams. For the Cementitious2user material model, the compressive stress-strain model can be user-defined. In this study, the GRK stress-strain model and Mander’s stress-strain model were used as input to calculate the shear strength of the reinforced concrete beams. The results showed that the shear strength of the test specimens increased with the concrete strength for all a/d ratios. However, as the a/d ratio increased from 1 to 3, the shear strength decreased by approximately 60%. The shear strength values obtained using ATENA with various models were compared with the experimental results, and it was found that the shear strength behavior from the numerical simulations closely matched the experimental results.
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