THE POWER-FLOW AND TRAVELING-WAVE APPROACH TO THE VIBRATION ANALYSIS OF BASE-ISOLATED MULTISTORY BUILDINGS

The receptance approach to periodic structure theory is applied to study the wave propagation and vibration power flow into a base-isolated multi-storey buiiding due to horizontal harmonic ground motion. Multi-storey buildings and laminated rubber bearings have been modeled as periodic systems in this paper. Although the simplified model considered is quite simple, it is expected that it will bring forth the key differences between continuous and a single freedom systems. The results indicate that the isolation effectiveness depends on not only the number of storeys of the laminated rubber bearings but also the frequency characteristics of the superstructure.