The effects of inoxydable steel in reinforced concrete structural elements

Abstract : This thesis focus on studying the behavior of composite concrete reinforced with inoxydable steel. The behavior of a bare steel bar is not the same as that of a bar embedded in concrete. The grip allows the concrete between cracks to resist tensile forces, thereby reducing the average level of stress in the reinforcement steel bars. The consideration of this effect required an experimental and numerical methodology to determine the parameters that describe the transfer of part of the tensile stress in steel bars to concrete. A new constitutive law has been specifically developed for the inoxydable steel bars. This law is integrated into a nonlinear modeling approach of reinforced concrete elements based on discretization in horizontal layers for the analysis section and a vertical discretization for the overall analysis. This approach is able to determine the tension stiffening parameters of the concrete. These parameters are identified using an inverse method by comparing experimental results and those from the numerical calculation. The comparison between experimental results and the prediction of the model implemented in Abaqus shows a very good correlation. Finally, the effect of inoxydable steel on structural responses under seismic actions is presented. Three models are designed and analyzed based on the seismic capacity taking into account the structural ductility of the inoxydable steel
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Sophia C. Alih. The effects of inoxydable steel in reinforced concrete structural elements. Other. Université de Lorraine, 2012. English. ⟨NNT : 2012LORR0083⟩. ⟨tel-01749242⟩

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