Effect of a characteristic length on crack spacing in a reinforced concrete bar under tension |
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Authors: | T. Ma ecki, I. Marzec, J. Bobi ski,J. Tejchman |
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Affiliation: | aGdansk University of Technology, Faculty of Civil and Environmental Engineering, 80-952 Gdansk-Wrzeszcz, Poland |
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Abstract: | The paper presents quasi-static FE-simulations of the crack formation in a reinforced concrete bar without stirrups subject to tension. The material was modeled with a continuum smeared crack model using an elasto-plastic constitutive law. A linear Rankine criterion with isotropic softening and associated flow rule was adopted in a tensile regime. To ensure the mesh-independency, the softening parameter was enhanced by a characteristic length of micro-structure by means of a non-local theory. Attention was laid to the effect of a different characteristic length of micro-structure and initial bond-slip stiffness on the spacing of localized zones. |
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Keywords: | Bond-slip Concrete Localized zones Elasto-plasticity FEM Non-local theory Reinforcement |
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