Fig. 12

Ratios of the torsional component amplitude spectrum density (ASD) (\(Z_{rot}\)) to the rocking component ASD (\(H_{rot}\)) for the soft-soil and rock sites
Ratios of the torsional component amplitude spectrum density (ASD) (\(Z_{rot}\)) to the rocking component ASD (\(H_{rot}\)) for the soft-soil and rock sites