Influence of the damping of the seismic base isolation system LRB on the dynamic response of the isolated structures

To limit the human and material damage caused by an earthquake, we can use devices that are able to diffuse the energy induced at the time of the earthquake before being transferred to the structure. Generally, we call these devices the seismic base isolation. The use of the base isolation device LRB (Lead Rubber Bearing) allows the control of the deformations which are localized on this last, and also allows carrying out a satisfactory compromise between the reduction of the seismic forces and the increase in the deformations of the base isolation. Therefore, a parametric study on the effective damping of the isolation system carried out in this work has allowed the evaluation of the influence of the damping of this seismic base isolation system on the dynamic response of the isolated structures in term of displacement, acceleration, interstory drift and absorbed energy.