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In the dynamic analysis of structural engineering systems, it is commonpractice to introduce damping models to reproduce experimentally observedfeatures. These models, for instance Rayleigh damping, account for the dampingsources in the system altogether and often lack physical basis. We report on analternative path for reproducing damping coming from material nonlinearresponse through the consideration of the heterogeneous character of materialmechanical properties. The parameterization of that heterogeneity is performedthrough a stochastic model. It is shown that such a variability creates thepatterns in the concrete cyclic response that are classically regarded assource of damping.

On damping created by heterogeneous yielding in the numerical analysis of nonlinear reinforced concrete frame elements