ABSTRACT
Concrete structures are damaged by environmental factors and loads to which they are subjected. To maintain such structures, it is necessary to properly determine the mechanical properties and degree of damage suffered by concrete using core tests. The relationship between the stress level of damaged concrete under compression and acoustic emission (AE) parameters was investigated using clustering and regression analysis with random forests to identify the most important AE parameters. For clusters 1 and 3, R2 was higher, and RMSE and MAE were lower than for non-clustered cases. Therefore, cluster analysis can be expected to improve the accuracy of AE testing. Finally, the most important parameter was determined to be rise time, the second was the centroid frequency. These two parameters can be used to clarify compressive fracture behavior of damaged concrete.
