Influence of LRB Isolators on Accelerations and Shear Forces in an Eight-Story Building with Shear Walls in Comas, Lima, Peru

Earthquakes are one of the leading causes of material losses and loss of human life worldwide. For this reason, ensuring the safety of buildings is of utmost importance. An effective solution to mitigate these risks is base isolation systems, a technology designed to reduce the impact of seismic movements on building structures. This study examines the influence of LRB (Lead Rubber Bearings) devices on the structural behavior in terms of accelerations and shear forces in an eight-story building, utilizing Etabs v22 software. The study compares structural performance through a nonlinear time-history analysis of a fixed base building against the same building equipped with a base isolation system. The results for the base isolated building demonstrate a reduction and a more uniform distribution of floor accelerations, which improves the stability of the building contents. Shear forces were significantly reduced by 72.76%, highlighting the effective flexibility of the implemented isolation system. Additionally, the energy dissipated by the LRB system achieved an efficiency of 76.5%. These findings confirm those reported in other studies and emphasize the importance of considering the implementation of these seismic protection systems in housing projects located in high seismic risk areas, such as the district of Comas, Lima, Peru.