Indexed in
COMPUTATIONAL FRAMEWORK FOR SHORT-STEEL FIBER-REINFORCED ULTRA-HIGH PERFORMANCE CONCRETE (COR-TUF)
SINOPSIS
We present a novel computational framework aimed at predicting the behavior of a short-steel fiber-reinforced ultrahigh-performance concrete (Cor-Tuf) at a scale of its microconstituents given limited experimental data. By this approach, a high-fidelity model (HFM) that approximates microstructural behavior using direct numerical simulation is constructed first. The rational for utilizing HFM at the initial stage stems from the fact that constitutive laws of its individual microphases are rather simple and, by at large, can be found in the available literature. The calibrated HFM is then employed to construct a digital database that represents additional load cases not available in the original physical experimental database. In comparison to HFM, the added complexity of material models in a lower fidelity model (LFM) based on the statistical sliced reduced order homogenization stems from simplified kinematical assumptions made in the LFM. Validation studies are conducted against a physical experiment of a notched three-point beam bending (TPBB) problem.