TY  - JOUR
T1  - Rayleigh dalgası Eliptisitesi kullanılarak S- Dalga Hız Yapısının Elde Edilmesi: Erzurum Örneği
TT  - Determining S-wave velocity structure using Rayleigh wave ellipticity: The case study of Erzurum
AU  - Özer, Çağlar
AU  - Pamuk, Eren
PY  - 2020
DA  - August
Y2  - 2020
DO  - 10.17824/yerbilimleri.663521
JF  - Yerbilimleri
PB  - Hacettepe Üniversitesi
WT  - DergiPark
SN  - 1301-2894
SP  - 147
EP  - 168
VL  - 41
IS  - 2
LA  - tr
AB  - S-dalga hızı (Vs) yerel zemin etkilerinin belirlenmesinde ve zemin dinamik analiziçalışmalarında oldukça önemli bir parametredir. Vs, klasik jeofizik yöntemler ile kolaylıklaelde edilebildiği gibi son yıllarda yapılan çalışmalarda Y/D (Yatay/Düşey) temel modRayleigh dalgası eliptisitesinin ters çözümü ile de elde edilmektedir. Bu çalışmadaErzurum’da bulunan, Afet ve Acil Durum Yönetimi ve Atatürk Üniversitesi DepremAraştırma Merkezi tarafından işletilen üç adet deprem istasyonunda kaydedilen gürültükayıtları yardımıyla her bir istasyona ait bir boyutlu (1-B) S-dalga hız yapısı ortayakonulmuştur. Öncelikle üç istasyon tarafından kaydedilen üç bileşen (D-B, K-G, Z)mikrotremor kaydının sürekli dalgacık dönüşümü yardımıyla temel mod Rayleigh dalgasıeliptisitesi elde edilmiştir. Sonraki aşamada eliptisite eğrisi Komşuluk Algoritması ile tersçözüm yapılarak 1-B’lu Vs derinlik kesitleri oluşturulmuştur. Son olarak elde edilen 1-B’luVs derinlik kesitlerinin doğruluğunu ve güvenilirliğinin sınanması amacıyla Vs derinlikkesitleri yardımıyla teorik Y/D spektral oranları elde edilmiş ve Nakamura yöntemiyle eldeedilen Y/D spektral oranları ile karşılaştırılmıştır. Vs değerleri üç istasyon için yaklaşık160 m derinliğe kadar düşük hata değerleri ile hesaplanmıştır.
KW  - Eliptisite
KW  - Rayleigh dalgası
KW  - Ters Çözüm
KW  - Y/D spektral oranları
KW  - Erzurum
N2  - S-wave velocity (Vs) is an important parameter in determining local site effects andsoil dynamic analysis studies. The Vs can be easily obtained by conventionalgeophysical methods, but it is also obtained from H/V (Horizontal/Vertical)fundamental mode by inversion of Rayleigh wave ellipticity in recent studies. In thisstudy, one dimensional (1-D) S-wave velocity structures of each earthquake stationlocation were determined by microtremor measurements recorded at three stationsoperated by Disaster and Emergency Management and Atatürk UniversityEarthquake Research Center in Erzurum. Firstly, the fundamental mode Rayleighwave ellipticity was obtained by the help of continuous wavelet transform of threecomponents (E-W, N-S, Z) microtremor measurement recorded by three stations. Inthe next step, 1-D Vs structure was obtained with the inversion of the ellipticity curvewith the help of the Neighbourhood Algorithm. Finally, in order to test the accuracyand reliability of the obtained 1-D Vs depth-sections, theoretical H/V ratio spectrawas obtained with the help of Vs depth-sections compared with H/V ratio spectraachieved by Nakamura method. Vs values were calculated approximately at 160 mwith very low error for three stations.
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UR  - https://doi.org/10.17824/yerbilimleri.663521
L1  - https://dergipark.org.tr/tr/download/article-file/1250779
ER  -