Özet:

In this study, the seismic behaviour of a structure with seismic base isolators under the near and far fault earthquakes have been investigated by continuous wavelet transform. Seismic responses of the building type structure idealized as a lumped mass-stiffness model with elastomeric isolators which have been placed at the base level have been obtained under near and far fault earthquakes. The most important property of near and far fault earthquakes is the difference in their frequency content. In order to develop a more detailed perspective on the displacement time responses obtained in the time domain, these responses have been presented in the scale (1/frequency)-time plane with the continuous wavelet transform using the Morlet wavelet. The information that could not be obtained from the displacement-time responses has been achieved from the wavelet transform and the differences in the seismic responses in terms of frequency contents have been observed. It has been clarified that during near-fault earthquakes, high frequency contents are spread over a wider time period. In addition, the correlation of displacement responses obtained under the effect of near and far fault earthquakes was measured with the wavelet coherence method and it has been concluded that the behaviours under near- and far-fault earthquakes have low correlation.

Anahtar Kelimeler: