Numerical simulation for coupling creep and damage of concrete on size effect plot

International audienceNumerical simulation for coupling creep and damage of concrete structures are presented in this paper associated with size effect law proposed by Bazant. Its behavior was investigated through two kinds of studies, the loading rate effect and residual capacity test. Three different sizes of beam, which is geometrically similar specimen, were simulated in three point bending test and creep test divided into load level test and residual capacity test. Numerical simulation was done using existing finite element code Aster_code developed by EDF (Electricite de France) for coupled between local damage based on bi-linear elasto damage model and creep based on Benboudjema's theory. Result show that the finite element code is capable to reproduce the experimental result qualitatively. The interaction between creep and damage is shown through size effect plot by giving the behavior shift to the right, which means that the materials become more brittle when creep appears