time-frequency tool based on wavelet analysis is employed to investigate the
dynamic responses of concentrically-braced frames tested in shake table tests. Damage
in the form of brace yielding and buckling is detected by comparing table and roof
accelerations using wavelet analysis. This comparison is carried out by
examining frequency-banded wavelet coefficients of the ground motion and elastic/inelastic
frame response, and by evaluating the corresponding energy contributions of the
different frequency bands.