3D interaction diagrams for symmetrically reinforced concrete square sections with various reinforcement ratios

Androniki-Anna Doulgeroglou (1) , Panagiotis Kotronis (1) , Giulio Sciarra (1) , Catherine Bouillon (2)

1 GeM - Institut de Recherche en Génie Civil et Mécanique
2 Sans affiliation

3D interactions diagrams for symmetrically Reinforced Concrete (RC) square sections with various reinforcement ratios are constructed using 3D non-linear finite element simulations. The interaction diagrams are expressed in terms of generalized forces (axial force, bending moment and shear force) and allow to identify two characteristic states: the first characteristic state corresponds to the elastic limit of the reinforcement bars (while concrete exhibits a non-linear behavior) and the second characteristic state to the peak values of the generalized forces generalized displacements curves. Firstly, 3D non-linear finite element simulations of RC cantilever-type columns are presented and validated with experimental results. Numerical interaction envelopes are then derived and analytical convex expressions are provided. Finally, a comparison with existing interaction diagrams from the literature is proposed.

Mots clés: Interaction diagrams; Reinforced concrete

Domaines: Génie civil

Androniki-Anna Doulgeroglou, Panagiotis Kotronis, Giulio Sciarra, Catherine Bouillon. 3D interaction diagrams for symmetrically reinforced concrete square sections with various reinforcement ratios. Engineering Structures, 2022, 262, pp.114272. ⟨10.1016/j.engstruct.2022.114272⟩. ⟨hal-03666644⟩