Date

2022-2-11

Author

Elsaid, Alaa

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At 8:55 p.m. local time (17:55 GMT) on January 24, the Sivrice district of Elazig, located on Turkey's second-largest fault system, was struck by a severe earthquake with a magnitude of 6.8 (AFAD) or 6.7 according to USGS. Tragically, the earthquake resulted in severe devastation, including structural damage and fatalities. In order to aid in the mitigation of potential earthquake damage that may occur in the region and to serve as a guide for site-specific seismic design for future earthquakes, the seismic site effects of the earthquake were assessed. Within the scope of this study, the assessments of seismic site effects during the 2020 Sivrice-Elazig earthquake were undertaken following mainly three stages; (i) the performance of seismic site response analyses, (ii) the investigation of soil liquefaction hazard, and (iii) the construction of seismic zonation maps. Geotechnical and geophysical data were acquired prior to initiating the study. A total number of 210 boreholes were included in the study and were used to create the idealized soil profile. The strong ground motion shaking of Elazig-Sivrice event, recorded by a total of seven strong ground motion stations (SGMS), was then calibrated and scaled locally in order to generate the rock motion needed in the site-specific seismic response analysis. Additionally, Deepsoil software was used to conduct the seismic site response analysis, whereas the Cetin et al. (2000, 2004, 2018) approach was adapted for the soil liquefaction study. Finally, the seismic parameters collected from the aforementioned analyses were used in the construction of the seismic zonation of Elazig-Center. This was accomplished by developing peak ground acceleration (PGA), spectral acceleration (Sa), and soil liquefaction hazard maps. Finally, recommendations for assessing seismic hazard for the Elazig-Center district were developed as part of this study's conclusion. As a word of caution, geotechnical data culled from the literature was assumed to be valid and representative throughout the analysis; therefore, any inaccuracies in the adopted geotechnical data can alter the results.

Subject Keywords

Elazig-Sivrice earthquake, Seismic zonation, Soil liquefaction, Site response analyses, Site effects

URI

https://hdl.handle.net/11511/96308

Collections

Graduate School of Natural and Applied Sciences, Thesis