Fig. 3From: Modelling of Stirrup Confinement Effects in RC Layered Beam Finite Elements Using a 3D Yield Criterion and Transversal Equilibrium Constraintsa Unidimensional representation of the concrete constitutive model and b variation of the ultimate strain in concrete as a function of the hydrostatic pressure, according to Eq. (8) and the parameter set used in Sect. 3.2.Back to article page