Abstract
The local site conditions have great impact on the characteristics of input motions propagating along the soil deposits. This eventually contributes to the damages of earthquake events to urban areas. This study reports the local site effect during the 08.11.2021 earthquake event occurred near the Konya city. For this, five input ground motions of the earthquake event recorded at five different stations are investigated. The stations are positioned at varied soil classes of A, B and C, and no recording is available on the class D site. In addition, site response analyses are conducted using five soil profiles from the site of Konya city. The soil profiles are simulated in the Deepsoil programme adapting equivalent linear approach in frequency domain. The spectral accelerations of the recorded input ground motions reflect obviously the influence of the local site conditions. When the soil site (where the earthquake is recorded) gets softer, the spectral peaks appear to shift to the longer periods. The site response analyses at the sites in the Konya city also imply such effect. The analysis of the soft soil deposit with the Vs of 175 m/s expresses de-amplification of the spectral accelerations at the shorter periods and amplifications at the longer periods. Moreover, the site response analyses tend to express good indication of the spectral amplification factors for different soil classes. These suggest that the local site conditions in the studied area, in addition to the peak ground acceleration level of the earthquake event, can increase the level of building damages. Overall, the study highlights the impact of local site conditions on the spectral accelerations of input motions and potential of site response analysis to speculate that effect.
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Acknowledgements
The authors thank to following companies in sharing soil data used in site response analyses: OPAL Engineering-Geotechnics Company, ALYANS Building Engineering Food and Electronic Industry Trade Limited Company, KAVAF Engineering and Drilling Services and BERTEK Geological Survey and Drilling Company.
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All the authors contribute to the concept and structure of the study. Author YG wrote the first draft of the manuscript and conducted site response analyses. Author FG contributed by obtaining the earthquake data and its processing and by revising the draft. All authors read and approved the final version of the manuscript.
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Guzel, Y., Guzel, F. Investigation of local site effect considering the recordings of the 08.11.2021 earthquake event in Konya, Turkey. Nat Hazards 116, 619–636 (2023). https://doi.org/10.1007/s11069-022-05691-3
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DOI: https://doi.org/10.1007/s11069-022-05691-3