Investigation of reliabilities of the triaxial concrete compressive strength models by fuzzy logic approach

Triaxial concrete compressive models have been used in the nonlinear analysis modeling of realistic behavior of concrete. It is possible to come across to a lot of mathematical models in the technical literature. Large numbers of models cause hesitations for different concrete strength and/or different lateral compression levels in the model selections. Therefore, investigations of reliabilities of the 25 triaxial concrete compressive models for 23 different concrete strength and 5 different lateral compression levels were determined as the main purpose of this study. In order to perform the reliability analyses, Monte Carlo Simulation was chosen as reliability method because of its accuracy and sensitivity. Great amount of experimental data required for Monte Carlo Simulations were supplied artificially by Fuzzy Logic approach. At the end of reliability analyses, reliability index values were obtained and evaluations were made by graphics. Finally, the reliable usage of the models were determined for combined different concrete strength and different lateral compressive stresses and summarized by tables.