Response of a R/C Building in Cephalonia (Gr) To Earthquake Excitations During the 26/01-03/02/2014 Seismic Sequence

Abstract eng:
The seismic sequence in the island of Cephalonia, Greece, in the beginning of 2014, which included two chronically close strong motions, raised the problem of determining the structural response due to the two consecutive strong seismic events. Due to the fact that the modern seismic codes do not include specifications dealing with such series of events, the majority of structures are analysed considering one design seismic event corresponding to an assumed specific occurrence probability during their structural life. The current study investigates the response of an existent r/c building in the region of Lixouri, in the island of Cephalonia, designed on the basis of the old Greek seismic code, applying the specific consecutive seismic events. By means of the results obtained, an attempt is made to test the potential ability of the finite element model for the approximation and justification of the real observed damage and, additionally, to explain the observed damage state after the second strong seismic event. For this purpose, non-linear time response analyses (NTRA) were performed using the available accelerograms. The results led to the conclusion that the observed damage state is generally verified by the results of NTRA. Finally, the results of the analyses show that the observed damage state, which is characterized by moderate damage in masonry infill walls and no damage in r/c structural members, is due primarily to the participation of the masonry infill walls in the seismic response of the building and secondarily to the foundation soil category.

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