INVESTIGATION OF THE EFFECT OF KOBE EARTHQUAKE ON A THREE-DIMENTIONAL SOIL-STRUCTURE SYSTEM

The study addresses the relationship between the characteristics of near-source earthquakes and the behaviour of the system frame structure with multiple foundations and subsoil. The ground excitations are the ground accelerations of the 1995 Kobe earthquake at 22 locations. The investigation reveals that the contributions of the time coincidence of the peak responses due to each ground motion component and the vertical ground motions to the total structural response should be considered. The soil-structure interaction can reduce and also amplify the structural peak responses and the response spectrum values in certain frequency range.