Akademik Veri Yönetim Sistemi
7th International Conference on Earthquake Engineering and Seismology-ICEES, Antalya, Türkiye, 6 - 10 Kasım 2023, cilt.401, ss.221-232, (Tam Metin Bildiri)
The spatial variability of soil characteristics is a crucial aspect that needs to be taken into account in soil dynamics analysis. This variability arises from the natural heterogeneity of soil aggregates and the sedimentation of soil layers, which increases the complexity of modeling seismic action at the base of structures. However, a probabilistic approach can be used to quantitatively integrate these uncertainties and dispersions. Such uncertainties and dispersions randomly vary in space and time, leading to form a random field. This paper aims to investigate the propagation of seismic waves in a medium with such spatial variability of soil characteristics. Two types of heterogeneity are considered: the first is due to the random distribution of the shear modulus in a soil profile, and the second is the heterogeneity of the interfaces of the multi-layer soil, represented by soil layers having random thicknesses. The results demonstrate the significance of considering soil heterogeneities in the soil- dynamics domain. Stochastic heterogeneity provides smaller amplifications and a filtering effect at low frequencies, while the random interfaces provide greater amplifications with a shifting of frequencies to the high ones.