A multiscale model for predicting the elasticity modulus and the strength of Ultra-High Performance Fiber Reinforced Concrete

A multiscale model for predicting the elasticity modulus and the strength of Ultra-High Performance Fiber Reinforced Concrete (UHPFRC) is developed. UHPFRC is treated at three length scales, i.e. the member at the macroscale, UHPFRC at the mesoscale, and Ultra-High Performance Concrete (UHPC) at the microscale. The three scales are linked by a unified mathematical homogenization method, implemented in the frame of the finite element method. By comparison of model predictions with experimental results, the proposed model was validated successfully to estimate the elasticity modulus, with an error of less than 2.28%. Unfortunately, the tensile strength from model predictions seems to be always smaller than the one from the experiments.