An evaluation of seismic hazard and potential damage in Gaziantep, Turkey using site specific models for sources, velocity structure and building stock

Date

2022-03-01

Author

Karimzadeh, Shaghayegh
Arslan Kelam, Arzu
Yousefibavil, Karim
Akgün, Haluk
Askan Gündoğan, Ayşegül
KOÇKAR, MUSTAFA KEREM
Erberik, Murat Altuğ
Ciftci, Hacer
Pekcan, Onur

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Assessment of potential seismic risk and losses in urban environments is necessary for several purposes ranging from risk mitigation to city and regional planning. It is well known that loss estimation should be performed within an interdisciplinary setting involving earth sciences and engineering. Field experience from recent events worldwide shows that the spatial variability of seismic damage is due to the combined effects of earthquake source properties, local site conditions and structural characteristics. In this study, a scenario-based multi-input damage estimation framework in an urban region was utilized for the Gaziantep city center (southeastern Turkey) that is located in a region of high seismic hazard with no large events in the instrumental era. Initially, a thorough geological and seismo-tectonic assessment of the area was performed followed by estimation of two critical scenario events with moment magnitude (Mw) of 6.5 and 6.6 on nearby active faults. Then, a regional velocity model was compiled from regressions of existing regional geotechnical and seismic data in terms of the VS30 parameter. As the next step, field surveys for the assessment and classification of buildings in the study area were performed followed by vulnerability analyses. As the last step, the mean damage ratios were computed at 198 neighborhoods within the city center. The results indicate not only a high hazard but also high risk in the Gaziantep area due to the combination of close proximity to the faults along with local site effects and building fragilities.

Subject Keywords

Building vulnerability, Gaziantep, Ground motion simulation, Regional velocity model, Seismic damage, Seismic hazard, Turkey

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85122074195&origin=inward
https://hdl.handle.net/11511/95385

Journal

Soil Dynamics and Earthquake Engineering

DOI

https://doi.org/10.1016/j.soildyn.2021.107129

Collections

Department of Geological Engineering, Article

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Citation Formats

S. Karimzadeh et al., “An evaluation of seismic hazard and potential damage in Gaziantep, Turkey using site specific models for sources, velocity structure and building stock,” Soil Dynamics and Earthquake Engineering, vol. 154, pp. 0–0, 2022, Accessed: 00, 2022. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85122074195&origin=inward.