Rezumat/Abstract. This paper presents the results of a comprehensive analysis conducted on a reinforced concrete frame structure subjected sequentially to extreme actions, namely seismic events and explosions. The structure was evaluated under two different foundation configurations: a traditional fixed-base (rigidly embedded in the ground) and a modern base-isolated system using Lead Rubber Bearings (LRB). Structural analyses were carried out in the elastic domain: the response spectrum method was applied for seismic actions, while a linear dynamic analysis using time-history functions was employed for explosions. The results emphasize the significant contribution of the elastomeric bearings to the structural response under both types of extreme loading scenarios.

Cuvinte cheie/Key words: LRB, earthquake, blast

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