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The Strain Energy Dissipation Behavior of Concrete Tension by Composite Action


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DOI: https://doi.org/10.15866/irea.v11i4.23767

Abstract


The concrete tensile deformation energy dissipation is of major interest for reinforced concrete uncracked section design. Extensive research, numerical and experimental, is dedicated on the concrete tension stiffening and its cracking behavior, but limited studies center on the deformation energy dissipation. A steel bar embedded in a cylindrical concrete specimen has been subjected to an axial tensile load, and the load-displacement responses recorded. A variation in concrete compression strength ranging from 32 MPa to 47 MPa has been observed. The focus of this study has been to analyze and formulate the deformation energy dissipation behavior as a function of concrete compression strength and reinforcement ratio. The experimental data have showed that the relationship followed a nonlinear ascending path with a bifurcation point, after which the curve’s gradient has gradually declined. A 3D finite element model has been constructed and validated to the experimental data. The model has been developed to generate the influence of a broad range of reinforcement ratios. An equation for predicting the tensile deformation energy dissipation has been proposed based on experimental and numerical data. The equation is valid for reinforcement ratios ranging from 0.001 to 0.1 and a compression strength of 47 MPa. The equation can be utilized for section optimization purposes.
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Keywords


Concrete Strength; Reinforcement Ratio; Tensile Deformation Energy Dissipation; Tension Stiffening

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