Constitutive model for concrete under dynamic loading

A rate and history dependent numerical model for plain concrete under seismic loading conditions is proposed. The model follows the modified Perzyna's theory of elasto/viscoplasticity employing the stress rate sensitive fluidity parameter and two surfaces in the principal stress space—the discontinuity surface defining the departure from elasticity, and the strength limit surface, to serve as a damage monitoring device and to initiate the degradation of the discontinuity surface once the stress point reaches the limiting strength level. A general model concept is given, together with the detailed description of the model version, based entirely on uniaxial test data. The identification of model parameters is related to the extensive experiments by Hatano et al. Two parameter Mohr/Coulomb surfaces are chosen for the multiaxial representation of both discontinuity and the strength limit surfaces in the context of non‐linear finite element analysis.