The thesis "Analysis of dynamic behaviour of a three-storey frame subject to ground motion" explores how a three-storey structure behaves when subjected to earthquakes. The aim of this study was to investigate the construction model under various excitations to understand its behavior under the influence of earthquakes. The first part of the work focuses on the theoretical foundations and essential information for computational and experimental methods that were used. Data collected through laboratory experiments at the Structural Engineering Laboratory of the Faculty of Civil Engineering in Rijeka are presented. The study proceeds to analyze parameters such as mass, structural stiffness, eigenvalues, and damping coefficients. These parameters serve as the basis for further analysis of the structure's response to dynamic loads, enabling an understanding of its fundamental dynamic characteristics. Also, a computer program has been developed, and the obtained results have been compared with the measurements. The differences between numerical and experimental results of the three-storey structure during earthquakes were analyzed, with potential variations caused by model characteristics. These analyses provide valuable insights for further advancement in the field of earthquake engineering and design.