A microplane model is proposed to simulate the behavior of concrete at static and tran- sient loading conditions. For that purpose, the model addresses several major characteristics in such loading scenarios by a coupled viscoplasticity-damage approach. The developed microplane yield…
A microplane model is proposed to simulate the behavior of concrete at static and tran- sient loading conditions. For that purpose, the model addresses several major characteristics in such loading scenarios by a coupled viscoplasticity-damage approach. The developed microplane yield function accounts for the realistic description of the different material responses in multiaxial tension and compression as well as the nonlinear material response at high volumetric pressure and the rate dependencyoftheconcrete. Moreover,apenaltyfunctiontoenableastableandrobustreturnmapping is developed. A damage approach considering proper stiffness degradation and crack closing effects is utilized. Furthermore, the model is regularized by an implicit gradient enhancement. The model is implemented within a 3D finite element code and the capabilities of the formulation are evaluated by several comprehensible numerical studies in comparison with experimental observations and results.