Elazığ-Sürsürü mahallesinin deepsoil yazılımı kullanılarak deprem tepki analizi

Earthquakes are a natural occurrence that can have a significant impact on millions of people worldwide each year. Türkiye is situated in one of the most seismically active regions in the world and has experienced numerous destructive earthquakes in recent decades. Elazig, a province in Turkey, is located in an area prone to high seismic activity. On January 24, 2020, the Elazig-Sivrice district was struck by a powerful earthquake measuring Mw=6.8 at 20:55 local time. Tragically, this event resulted in extensive destruction, including structural damage and loss of life. This study aims to present findings and results regarding the earthquake's seismic impact. The objective is to minimize the impact of future earthquakes and provide recommendations based on seismic parameters. Significant structural damage occurred in the Elazig-Sürsürü Neighborhood, primarily composed of young sediments classified as brown gravelly sandy clay, with a groundwater table located below a depth of 15 meters. In order to conduct this study, geotechnical and geophysical data about the Sürsürü Neighborhood were collected from 72 boreholes to create an idealized soil profile. The investigation was conducted in two stages. Initially, seismic site response analyses were carried out using DEEPSOIL (7.0) software. Subsequently, the collected seismic parameters were used to create seismic site zoning maps using geographic information system (GIS). Additionally, this study aimed to create maps of site dominant vibration period (T0), shear wave velocity (Vs30), and velocity ratio (Vp/Vs). Finally, a seismic hazard assessment specific to the Elazig-Sürsürü Neighborhood was developed as part of the study's conclusions. The results indicated that the groundwater level in the area varies between 3 meters and 16 meters, with some areas having no encountered groundwater. Based on the NEHRP soil classification, the study area is predominantly composed of Class D soils, with occasional areas of Class C soils. The soil types in the Sürsürü Neighborhood primarily consist of CL (low plasticity clay), occasionally CH (high plasticity clay), SM (medium plasticity silt), and SM (silty sand). The shear wave velocity ranges from 190 to 365 m/sec, the Vp/Vs ratio from 1.9 to 3.45, and T0 from 0.47 to 0.66. The highest ground amplification among the 11 earthquakes analyzed was calculated as 4.3 in the Coyote earthquake, while the lowest ground amplification was calculated as 0.71 in the Kobe earthquake. It is important to note that inaccuracies in the geotechnical borehole data used may impact the study's findings, as the collected data were assumed to be valid and representative throughout the analysis. Keywords: Earthquake, Elazığ, Deepsoil, site effect, spectrum analysis, soil amplification, mapping.