Study on the Simulation parameters in meso scale concrete model

Numerical models are feasible approach against field studies which are capable of estimating of materials behavior appropriately if material properties are considered exactly. Numerical models are categorized in three sets: Micro, meso and Macro scale. In macro scale, the whole concrete is considered as a one phase material and usually the interaction between concrete-steel is just modeled. In Micro Scale Modelling, the cement-aggregate crystals are evaluated. The other preference of meso scale numerical model is the ability of presenting different phases interaction in multi phase materials such as concrete. This feature is useful in high rate dynamic load such as explosion. To perform meso scale modeling, different random specimens with different contents of aggregates must be produced. In different studies, a unique pattern which could generate real aggregation is not used. Aggregates generated in this study are elliptical, and by controlling the lack of interference with each other, aggregates are randomly assigned into the defined template boundaries. Then, in the next step, the specimen is meshed by choosing dimensions of elements in cubic form. Finally, the prototype is transformed into the input text file of the numerical analysis programs. The comparison between produced aggregate curve and real cure shows good agreement.