Vertical spectral tomography of concrete structures based on impact echo depth spectra

摘要: This paper proposes a vertical spectral tomography for use in nondestructive testing of concrete structures. Impact echo tests are conducted along test line on the surface. Then, response curves transformed into depth spectra. Arranging spectra parallel and representing amplitude by color scale, one obtains an image cross-section under line. Three types tomograms proposed. Numerical experimental performed to verify compare tomograms. Although different possess attributes, all three can depict internal crack successfully. The is represented bright stripes tomograms, which be used estimate size location crack. tomogram provides direct cross-section. It may serve as useful tool inspection