Parametric Analysis of Dynamic Insulation in the Action of the Seismic Movements of the Base-Insulated Buildings

Abstract

Buildings protection against seismic actions has, in recent times, led to an intense emulation of innovative solutions for the insulation of the base. Thus, under the new conditions of industrial development of antiseismic devices, at high and guaranteed performance level, dynamic isolation systems can be achieved resulting from assembling in various configurations of simple devices. In this context, the designers have, on the basis of the elastomeric antiseismic devices and the fluid dissipators, constructed individual units in a modular system. These, by installation-mounting in a sufficiently large number, are designed to provide the degree of dynamic isolation. In the present paper we present a modular E/(E − V) type Zener model, consisting of two elastomeric devices and a viscous damping fluidized dissipator. In order to isolate a building, a sufficient number of modules must be used to define in a unitary isolation system the base for a given building. Consequently, the paper will include the dynamic model based on Zener schematization of the entire isolation system and the specific parameters for calculating and evaluating the dynamic isolation level.