Analysis of seismically‐isolated two‐block systems using a multi–rocking‐body dynamic model

A novel multibody rocking model is developed to investigate the dynamic response of two stacked rigid blocks placed on a linear base isolation device. The used realistic statue-pedestal system subject pulse-like ground motions. analysis shows that, in general, increases safety level system. However, for large period pulses or small size blocks, isolator can amplify motion, resulting lower minimum overturning acceleration than nonisolated Further, amplification shock spectrum mass-dashpot-spring oscillator, was found be reciprocal nondimensional investigated Novel spectra are obtained by normalizing frequency pulse isolator. also demonstrates how equivalent that single-block configuration coincident with whole assumed monolithic upper block alone, whichever more slender.