Numerical evaluation of aggregate size influence on concrete mechanical damage under high temperatures

Numerical evaluation of aggregate size influence on concrete mechanical damage under high temperatures

Blog Article

Abstract The influence of aggregate size on the degradation process of material exposed to high temperatures is Circle Jewelry Dish not a consensus among the scientific community because changes in the microstructure impact the macrostructural performance.To contribute to this investigation this work presents a thermomechanical model to evaluate aggregate size influence on the concrete mechanical damage under high temperatures.The material is considered as two-phase - aggregate and matrix - and three-phase - in which the interfacial transition zone is added.

Concerning geometries, models Computer Wire in 2D and 3D are simulated.A finite element software is used with a weak coupling strategy that reduces the computational cost, and a user subroutine is implemented to define the constitutive model.The results show that the aggregate size influences both the average damage and the damage distribution along the synthetic specimen.