3D shear-wave velocity structure for Oran city, northwestern Algeria, from inversion of ambient vibration single-station and array measurements
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Title: | 3D shear-wave velocity structure for Oran city, northwestern Algeria, from inversion of ambient vibration single-station and array measurements |
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Authors: | Saadi, Ahmed | Issaadi, Abdelouahab | Semmane, Fethi | Yelles-Chaouche, Abdelkrim | Galiana-Merino, Juan José | Layadi, Khalissa | Chimouni, Redouane |
Research Group/s: | Grupo de Ingeniería y Riesgo Sísmico (GIRS) |
Center, Department or Service: | Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal | Universidad de Alicante. Instituto Universitario de Física Aplicada a las Ciencias y las Tecnologías |
Keywords: | Ambient vibrations | HVSR | Array technique | F–K analysis | Vs-structure | Oran city |
Issue Date: | 10-Oct-2022 |
Publisher: | Elsevier |
Citation: | Soil Dynamics and Earthquake Engineering. 2023, 164: 107570. https://doi.org/10.1016/j.soildyn.2022.107570 |
Abstract: | The city of Oran experienced several earthquakes. Therefore, the characterization of its subsurface is crucial for a better evaluation of the seismic hazard. Using ambient vibration single-station and array measurements at 193 sites, the HVSR curves showed a variation of the fundamental frequency peak between 0.3 and 7.4 Hz, growing towards the west, with maximum amplitude of ∼6. The shallow structure has been explored by means of F–K analysis. Joint inversion of the HVSR and Rayleigh wave dispersion curves showed 3 layers of soft and stiff sediments of varying thicknesses overlying the bedrock. The shear-wave velocity (Vs) of the sediments varies between 280 and 1300 m/s and that of the bedrock can reach 2500 m/s. Cross sections show a decrease in sediments thickness from east to west where bedrock outcrops. The maximum depth of bedrock is 1050 m northeast of the city. The obtained Vs models support a soil classification ranging from stiff soil to hard rock. |
URI: | http://hdl.handle.net/10045/128504 |
ISSN: | 0267-7261 (Print) | 1879-341X (Online) |
DOI: | 10.1016/j.soildyn.2022.107570 |
Language: | eng |
Type: | info:eu-repo/semantics/article |
Rights: | © 2022 Elsevier Ltd. |
Peer Review: | si |
Publisher version: | https://doi.org/10.1016/j.soildyn.2022.107570 |
Appears in Collections: | INV - GIRS - Artículos de Revistas |
Files in This Item:
File | Description | Size | Format | |
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Saadi_etal_2022_SoilDynamEarthquakeEng_final.pdf | Versión final (acceso restringido) | 13,97 MB | Adobe PDF | Open Request a copy |
Saadi_etal_2022_SoilDynamEarthquakeEng_revised.pdf | Embargo 24 meses (acceso abierto: 11 oct. 2024) | 2,33 MB | Adobe PDF | Open Request a copy |
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