A new model for basic creep of concrete under multiaxial compressive stresses is proposed. The basic creep is considered to be the result of two processes, which are driven by spherical and deviatoric components of the stress tensor, respectively. Each…
A new model for basic creep of concrete under multiaxial compressive stresses is proposed. The basic creep is considered to be the result of two processes, which are driven by spherical and deviatoric components of the stress tensor, respectively. Each part of the creep deformation process is associated with a physical mechanism. The first one is the migration of the adsorbed water in the macro-porosity. The second mechanism corresponds to the sliding of C-S-H gel sheets. The basic creep model has been coupled with an isotropic damage model coupled with plasticity. Some numerical simulations are performed. They show that the model response fits pretty much with experiments, as far as multiaxial loads are concerned.