Abstract
To better understand the characteristics of ultrasonic wave propagation in concrete, we propose a time domain simulation tool. The tool is based on the elastodynamic finite integration technique (EFIT). When modeling ultrasonic wave propagation in concrete, it is important to introduce a three-dimensional (3D) concrete structure including aggregate distribution. Because ultrasonic waves in solids are propagating as a consequence of the mechanical interaction between adjacent media. In this paper, the wave velocity, center frequency, and attenuation of ultrasonic wave in concrete were quantitatively evaluated by comparing the waveforms obtained by the EFIT simulation with those found in experimental measurements. These values were in good agreement between the simulation and the measurement. Since the amplitude of the ultrasonic wave is sensitive to the allocation pattern of aggregates, it can be understood that the scattering attenuation is more dominant than attenuations due to the intrinsic absorption and geometrical spreading in concrete.
