Multiple Hardening Plasticity for Concrete Materials

Abstract

A multiple hardening plasticity model for concrete materials under a general three‐dimensional quasi‐static loading condition is developed for the progressive failure analysis of concrete structures. The main features of the proposed short‐term, time‐independent constitutive model include (1) The use of the simple expressions of the Chen‐Chen surfaces that have an initially closed shape with subsequent open‐up loading surfaces; (2) the introduction of the multiple hardening parameters with each of these parameters corresponding to a clear physical meaning; (3) the successful use of the associated flow rule in modeling the inelastic dilatation/contraction behavior of concrete; and (4) the multiple parameters allow a good fit with the experimental data, using even a simple failure surface such as the Chen‐Chen model.