DEPREM BÖLGESİ KONUTLARININ HASAR ALMA SEBEPLERİ VE DEPREM ETKİLERİNİN AZALTILMASI İÇİN ÖNERİLER

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Thesis Type: Postgraduate

Institution Of The Thesis: Istanbul Commerce University, Mimarlık Ve Tasarım Fakültesi, İç Mimarlık Ve Çevre Tasarımı Bölümü, Turkey

Approval Date: 2024

Thesis Language: Turkish

Student: Turhan Miraç Selçuk

Supervisor: Makbule Tuba Bostancı Baskan

Open Archive Collection: AVESIS Open Access Collection

Abstract:

Seismic activities pose a significant threat to building stocks worldwide. The earthquakes of magnitudes 7.7 and 7.6 that occurred on February 6, 2023, in Kahramanmaraş, Turkey, resulted in substantial human and economic losses across a wide region. Field investigations revealed similarities in the structural damages observed in the affected areas. This disaster highlights the need for further research in earthquake engineering and the revision of building safety standards. In this study, the damaged buildings in Malatya were examined, and the types and causes of these damages were analyzed. In the earthquake that occurred in Malatya, the damage distribution was significantly affected by geological and geotechnical factors. Especially the ground amplification effect increased the severity of the damages observed in the regions where alluvial units are common (Bostanbasi, Fahri Kayhan, Yüzakı, Battalgazi Eski Malatya, Orduzu, Fuzuli). Old building stock in the central districts and low-rise reinforced concrete structures in the north caused significant destruction in the earthquake. The damage distribution in Yeşilyurt district is concentrated in the areas where the alluvial units called Beylerderesi formation are surfaced. On the contrary, less damage was observed in Çamurlu region, west of Yıldıztepe, where rock units with different degrees of weathering are found. Damage intensity varied between districts depending on local soil conditions and structural characteristics. Major causes of structural damages include manufacturing defects, soft floor formations at ground and floor levels, inadequate dilatation joints, concrete quality problems and reinforcement deficiencies. In general, a significant portion of the structures were subjected to ground magnification due to local ground conditions. However, it is a remarkable finding that the fine-grained soil profile did not show liquefaction despite high acceleration earthquake loads and groundwater level.