Un modello viscoplastico con danneggiamento per il calcestruzzo soggetto a prolungati sforzi elevati

A viscoplastic model with damage was developed to describe the mechanical behaviour of plain concrete subjected to sustained multiaxial stresses of high intensity. The model is characterized by inelastic strains due to plasticity and damage and by a second-order damage tensor. The evolution laws for these variables are based on the proposals by other authors for metals and rocksalt. The reliability of the model, presented here in the uniaxial case, was assessed through comparisons with available test results.