Abstract
As a detailed inspection of a concrete structure in service, core samples are usually drilled out and then mechanical properties are measured. In this study, damage estimation of structural concrete from concrete-core samples is developed, applying acoustic emission method. By the authors, the quantitative damage evaluation of concrete has been proposed, by applying acoustic emission (AE) and damage mechanics in the compression test. In this study, development of damage parameters is conducted with the Kriging method, which is evaluation of spatial characteristics. In the experiments, AE behavior of damaged concrete under compression is dependent on the local distribution of cracks, and could be approximated by applying damage parameter and P wave velocity. These experimental results suggest that the decrease in physical properties could be evaluated by detected AE parameters, which is incorporated with the Kriging estimation. These values are affected by the internal actual damage. Thus, the damage of concrete could be quantitatively evaluated by damage parameters based on detected elastic waves with the Kriging analysis.
