Damage detection in concrete elements with surface wave measurements

The objective of this research was to assess the ability of surface wave measurements and the SASW technique to detect crack damage in beam and column elements.;The damage was detected by a change in the surface wave dispersion curve (phase velocity vs frequency) between undamaged and damaged states. To calculate the dispersion curve, the SASW (Spectral Analysis of Surface Waves) technique was used with response records from two locations. Finite element analysis was used to analytically generate the response records. Experimentally, acceleration measurements were taken.;Results showed that the SASW method is one potential method to detect cracks.