ABSTRACT
This chapter deals with the resonance conditions of a rigid free standing block in order to highlight to what extent the ground motion details and the system parameters can influence the rocking response. Numerical and parametric analyses are carried out with reference to the stabilized phase, together with the construction of resonance spectra showing the influence of the mean parameters. In general, results indicate that energy amplification due to multiple distinct impulses can be important. Basically, earthquake ground motions do not tend to resemble such an artificial resonance input, so the possibility of true rocking resonance over a long period is unlikely. The meaningful parameters that influence the stabilized response are the size and the slen-derness of the block, the coefficient of restitution and the features of the acceleration pulses representing the resonance input.
