Aydın, İshak Can

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A., Ishak Can
I.C.Aydin
İ.,Aydın
Aydın, İshak Can
İ.C.Aydın
Aydin,I.C.
Aydin, Ishak Can
I., Aydin
Ishak Can, Aydin
İshak Can, Aydın
A.,Ishak Can
Aydın,İ.C.
A.,İshak Can
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Araştırma Görevlisi
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ishak.aydin@atilim.edu.tr
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    Article
    Citation Count: 11
    Investigation of RC Buildings after 6 February 2023, Kahramanmaras, Turkiye Earthquakes
    (Mdpi, 2023) Mertol, Halit Cenan; Tunç, Gökhan; Akış, Tolga; Kantekin, Yunus; Kantekin, Yunus; Aydın, İshak Can; Civil Engineering; Department of Civil Engineering
    Two major earthquakes struck Pazarcik and Elbistan, towns in Kahramanmaras, Turkiye, on 6 February 2023, approximately 9 h apart. The first earthquake, recorded at 04:17 local time, had a M-w = 7.7, with a focal depth of 8.6 km. At 13:24 local time, a second earthquake occurred with M-w = 7.6 at a focal depth of 7 km, approximately 90 km north of the first one. A total of 11 provinces were severely affected by these earthquakes. As of 15 April 2023, they caused close to 51,000 deaths and almost 215,000 completely destroyed/severely damaged buildings. At some locations, the largest horizontal peak ground acceleration (PGA) values of the first and second earthquakes exceeded the code-generated PGAs by almost 3 and 1.75 times, respectively. A technical team visited these areas within 15 h of the first earthquake. The purpose of this article is to present their observations, findings, and the characteristics of the two earthquakes, with comprehensive site survey results supported by photographs. This study concludes that most of the collapsed and severely/moderately damaged buildings in the region were built between 1975 and 2000, when site inspections were rare or non-existent. In addition to the high PGAs recorded in these earthquakes, it was verified that the design and construction of these buildings did not fully comply with the earthquake codes valid at the time. The collapsed buildings and their damage patterns confirm inadequate development length, violation of bending stirrup ends at 135 & DEG;, deficiencies in construction materials and reinforcement configuration, noncompliance with confinement zones, violation of the strong beam-stronger column analogy, and issues related to building inspection. Based on the extent of the damage, it is strongly recommended that the structural performance inspection of all other buildings located near major fault lines, specifically those constructed between 1975 and 2000, should be completed. Since these earthquakes generated much higher PGAs, which is believed to be one of the main reasons for the extensive damage, a re-evaluation of all other PGAs along major fault lines is also recommended.