Fig. 3From: Ductility Design of Reinforced Very-High Strength Concrete Columns (100–150 MPa) Using Curvature and Energy-Based Ductility IndicesMoment–curvature analysis: a Geometry of the column, b stress–strain relationship for confined and unconfined concrete, c nonlinear moment–curvature behaviour for different axial load levels ρl = 0.17, fr = 4 MPa, fc = 130 MPa.Back to article page