Identification of Concrete Fracture Parameters Using Inverse Analysis

This paper addresses the identification of essential concrete fracture parameters necessary for modeling structures subjected to complex loading conditions. Given the difficulties associated with obtaining the concrete softening curve through direct uniaxial tests, the study adopts the indirect wedge splitting test. Experimental measurements, acquired through a non-contact technique, are employed in a proxy model to accelerate the identification procedure. The proxy model facilitates numerical simulation of experimental outcomes, while the macro-scale model, implemented in commercially accessible software ABAQUS, serves as a model for the identification procedure. Based on the prior practical knowledge, the identification is divided into elastic and softening part to enhance computational efficiency. Various test setups account for measurement dispersion, considering measurement errors in a probabilistic identification procedure based on Bayes’s theorem.