Conception et Simulation Numérique des Systèmes d’Isolation Sismique à la Base Selon les Nouvelles Règles Parasismiques Algériennes (RPA2024)

Abstract

This thesis presents a comparative study of the seismic behavior of reinforced concrete structures, with and without base isolation systems, in accordance with the Algerian Seismic Regulation (RPA 2024). The primary objective is to evaluate the efficiency of isolation systems particularly High-Damping Rubber Bearings (HDRB) and Friction Pendulum Systems (FPS) in reducing seismic forces transmitted to the superstructure. A comprehensive literature review is first presented, followed by an analysis of earthquake effects on civil engineering structures within the Algerian context. The RPA 2024 seismic regulation is then detailed, with emphasis on base isolation requirements. A R+9 building with basement, located in a high seismicity zone, is selected as the case study. Seismic analyses are performed using Etabs software, based on the modal response spectrum method. Results demonstrate that HDRB isolation reduces base shear forces by 54%, roof accelerations by 89%, and enables reinforcement savings of up to 50% for small column sections. These findings confirm the relevance of base isolation in the Algerian seismic context.