6th International Conference on Earthquake Engineering and Seismology, Kocaeli, Turkey, 13 - 15 October 2021, pp.990-999
On October 30, 2020, an earthquake with a magnitude of MW = 6.6 occurred due to the rupture of 30 to 40 km
of a normal fault in east-west direction which is approximately 12 km far away from Samos Island, Greece.
During this earthquake, Bayraklı district of the city of Izmir, Turkey, which is 70 km to the epicenter, was
severely affected despite its far location. In the scope of this study, preliminary assessment of geotechnical
aspects and structural damage which occurred in Manavkuyu neighbourhood of Bayraklı district is conducted.
In this context, spectral characteristics of strong ground motion and local site effects such as soil amplification,
resonance and soil nonlinearity are investigated. It is revealed that a significant amplification of rock
acceleration occured due to soft and deep soil layers in the study area. Although the basin effect is considered
to strongly contribute to soil amplification, its assessment is left for further studies. Considerable amount of
soil nonlinearity is both observed from strong motion records and effective stress based seismic response
analysis. Finally, the observed structural damages are discussed considering aforementioned aspects.