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Shear Strength of SFRC Beams Without Coarse Aggregate Using Finite Element Analysis with Bond-Slip


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DOI: https://doi.org/10.15866/irece.v14i4.22482

Abstract


The numerical evaluation of the shear strength of Steel-Fiber Reinforced Concrete (SFRC) beams without coarse aggregate using data from previous research has been performed in MIDAS FEA. The SFRC beams are modeled by using the total strain crack model with Thorenfeldt for compression behavior and brittle tension behavior. Modified bond stress-slip functions proposed by fib have been used to model the bond between concrete and reinforcement. From the finite element analysis, the cracking pattern and the maximum load at failure of SFRC beams without coarse aggregate have been similar to the test results. As the longitudinal reinforcement ratio increases above 3%, the finite element analysis starts to give overestimated maximum load. The highest ratio of maximum load from analysis and test results equal to 136% has been obtained from 7.82% reinforcement. It is also observed that the influence of longitudinal reinforcement ratio on the shear strength of SFRC without coarse aggregate is lower compared to normal-strength concrete predicted by ACI 318-19. Further studies on bond stress-slip relationship of SFRC without coarse aggregate are needed.
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Keywords


Bond-Slip; Coarse Aggregate; Concrete Shear Strength; MIDAS FEA; Steel Fiber

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References


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