Lamb wave analysis for non-destructive testing of concrete plate structures

Lamb waves are guided dispersive waves propagating in free plate structures (Lamb, 1917). By matching theoretical multimodal Lamb wave dispersion curves with experimental ones, shear wave velocity (Vs), Poisson's ratio (v), and thickness (d) of the tested plak structure can be evaluated. In this expanded abstract a practical approach for NDT of pavements and concrete structures utilizing multiple modes of Lamb wave dispersion curves is presented. Both the measuring procedure and the analysis scheme is described. A complete description of how to calculate theoretical Lamb wave dispersion curves and more details on this study were given in the original manuscript (Ryden et al. 2003).