Abstract
Behavior of the self-standing structure on the ground under sinusoidal excitation in horizontal direction is investigated. The nonlinearities of rocking motion and sliding motion and the impact between base and structure are considered to examine this behavior. The analytical model is composed of a rigid block for simplification. The relationship between the amplitude of vibration acceleration and the excitation frequency is investigated, in addition to that between the amplitude of vibration acceleration and friction coefficient. It is found that the maximum rocking angle depends on frequency of input wave, and the maximum sliding displacement becomes large when the input wave has large acceleration in a long period region. In addition the rocking angle tends to decrease due to occurrence of sliding motion. Therefore, it is said that rocking and sliding motion should be suppressed simultaneously.
