Geotechnical Characteristics of Golbasi (Adiyaman) Soils Exhibiting Large Deformations on February 06, 2023 Earthquakes
On February 6, 2023, Mw=7.7 and Mw=7.6 earthquakes struck the south-east Turkiye region including eleven municipal areas and several districts at 04:17 and 13:24 local time. One week after the earthquake, a geotechnical earthquake engineering team from Dokuz Eylul University conducted a field investigation for building damage assessment and soil site effects in Golbasi, Adiyaman. Our team carried out a reconnaissance study for damaged structures and ground conditions to evaluate the soil behavior during and after the earthquakes. Reconnaissance studies and data gathering in local engineering and constructions firms revealed that extensive damage was related to softening of cohesive soils rather than liquefaction in the lake side zone of Golbasi. Bearing capacity loss of the building foundations were in either excessive uniform settlement or rigid tilt modes for recently constructed reinforced concrete building with mat foundations. Buildings that were built before 2000, however, severely damaged as a result of poor foundation systems and often caused life losses. Observations made with 10 to 15 days intervals in the area and personal discussions with locals who experienced the earthquakes in person showed that the sink and tilt response of the buildings are time dependent obeying to the cohesive nature of the soil profile. Geotechnical properties of the site soils including soil profiles, grain size distribution, consistency limits, water content, SPT blow counts, Vs30 and Vs100 that were acquired in site investigation study are presented in this proceeding. Comparisons with pre-earthquake site investigation data acquired from archives are made where available.
Session: February 2023 Mw 7.8 Earthquake Sequence in Turkey
Type: Oral
Room: 201 A/B
Date: 4/19/2023
Presentation Time: 02:15 PM (local time)
Presenting Author: Gurkan Ozden
Student Presenter: No
Additional Authors
Gurkan Ozden Presenting Author Corresponding Author gurkan.ozden@deu.edu.tr Seismological Society of America |
Okan Tatar okan.tatar@ogr.deu.edu.tr Dokuz Eylul University |
Busra Kartal busra.kartal@ogr.deu.edu.tr Dokuz Eylul University |
Onur Atlı onur.atli@ogr.deu.edu.tr Dokuz Eylul University |
Yeliz Yukselen Aksoy yeliz.yukselen@deu.edu.tr Dokuz Eylul University |
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Geotechnical Characteristics of Golbasi (Adiyaman) Soils Exhibiting Large Deformations on February 06, 2023 Earthquakes
Category
February 2023 Mw 7.8 Earthquake Sequence in Turkey
Description