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Determination of spectral aggravation factors in alluvial basins by nonlinear numerical analyses    
Yazarlar
Dr. Öğr. Üyesi Bilal ÖZASLAN
İstanbul Teknik Üniversitesi, Türkiye
Recep İyisan
İstanbul Teknik Üniversitesi, Türkiye
Özet
In this study, it was investigated how strong ground motions are affected by the multiple reflections, transformation, superposition, and interference with surface waves and trapped seismic waves in the near surface soft soil layer due to the bedrock inclination in narrow alluvial basins. One and two-dimensional (1D and 2D) dynamic analyses were performed to investigate the complex site effects in narrow alluvial basins that have soft soil conditions considering soil nonlinearity and changing geometrical features by numeric models simultaneously. The site classes were defined as ZD and ZE that mostly needed site-specific analysis by classification of Turkish Building Earthquake Code 2018 provisions. The response spectrums and amplifications were calculated under different levels of earthquake excitations. As a result, Spectral Intensity Factors (AGF2D/1D), which are defined for each point depending on the period (T) and the dimensionless distance from the basin edge (x/L), were calculated with the ratio of absolute acceleration spectra of 1D and 2D analyses. Thus, it is considered that the results will guidance to prevent unexpected damages and losses by calculating reliably the spectra that determine the earthquake loads on the structures, contribute to the development of earthquake maps, and ensure safe urbanization and construction.
Anahtar Kelimeler
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale
Dergi Adı JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY
Dergi ISSN 1300-1884
Dergi Tarandığı Indeksler SCI
Makale Dili Türkçe
Basım Tarihi 01-2022
Cilt No 37
Sayı 1
Doi Numarası 10.17341/gazimmfd.814370
BM Sürdürülebilir Kalkınma Amaçları
Atıf Sayıları
Determination of spectral aggravation factors in alluvial basins by nonlinear numerical analyses

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