TRIAXIAL CREEP-BEHAVIOR OF PLAIN CONCRETE AT HIGH STRESSES - A SURVEYOF THEORETICAL-MODELS

A survey was performed to find in the literature theoretical models su itable to the description of the triaxial creep behaviour of plain con crete at high stresses. The considered models are based on the theory elasto-viscoplasticity with damage and are mainly addressed to the dom ain of geotechnics. Application of these models to the simulation of e xperiments turned out to be satisfactory on the whole, although severa l features of the creep behaviour of the material are not reproduced. The suggestions given by this preliminary work will be taken into acco unt in the development of a future model specifically conceived for co ncrete.