Triaxial creep behaviour of plain concrete at high stresses: a survey of theoretical models

A survey was performed to find in the literature theoretical models suitable to the description of the triaxial creep behaviour of plain concrete at high stresses. The considered models are based on the theory of elasto-viscoplasticity with damage and are mainly addressed to the domain of geotechnics. Application of these models to the simulation of experiments turned out to be satisfactory on the whole, although several features of the creep behaviour of the material are not reproduced. The suggestions given by this preliminary work will be taken into account in the development of a future model specifically conceived for concrete.