Abstract
In this study, the geological and geotechnical conditions of old Istanbul (Fatih and Eminönü provinces) were investigated in detail and a seismic microzonation study was undertaken for this historical peninsula, which is the site of many ancient structures. Dynamic site response, liquefaction potential and slope stability analyses were carried out, based on field and laboratory tests and earthquake time histories computed with respect to probabilities of exceedance of 10 and 40% in 50 years. The output data obtained from the analyses were evaluated by GIS techniques, and ground shaking, liquefaction susceptibility and landslide hazard maps were prepared.
Résumé
Dans cette étude, les contextes géologiques et géotechniques du vieux Istanbul (quartiers de Fatih et d’Eminönü) ont été étudiés en détail. Un micro-zonage sismique a été réalisé pour la péninsule historique, siège de nombreuses anciennes structures. La réponse dynamique du site, le potentiel de liquéfaction des terrains et l’état de stabilité des pentes ont été déterminés, prenant appui sur des essais in situ et de laboratoire ainsi que sur les données de sismicité historique. Les calculs ont été réalisés pour des probabilités de dépassement de 10% et 40% en 50 ans. Les résultats de calcul ont été traités dans un système d’information géographique, des cartes de niveaux de sollicitation sismique, de susceptibilité à la liquéfaction et d’aléa glissement de terrain ont été préparées.
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Acknowledgments
The authors are thankful to the municipalities of Eminönü and Fatih, and Erdoğdu Savaşkan from Bilgi2000 Ltd. for their valuable contributions to the preparation of this paper.
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İnce, G.Ç., Yildirim, M., Özaydin, K. et al. Seismic microzonation of the historic peninsula of İstanbul. Bull Eng Geol Environ 67, 41–51 (2008). https://doi.org/10.1007/s10064-007-0099-9
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DOI: https://doi.org/10.1007/s10064-007-0099-9
Keywords
- Microzonation
- Liquefaction
- Landslide hazard
- Dynamic site response analysis
- Amplification
- Earthquake simulation