Afet Planlamasında Deprem Riski Belirsizliklerinin Değerlendirilmesi

Fahjan, Yasin M.; Pakdamar, Ferhat; Eryılmaz, Yaşasın; Kara, Fatma İlknur

doi:10.21324/dacd.61620

Cited by 8 publications

(1 citation statement)

References 18 publications

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“…This parameter has a direct or indirect effect on the occurrence of disasters that enable people to perform many activities or interrupt these activities [39]. As another parameter related to the natural environment, the fault lines are one of the geological features of residential areas, the degree of influencing the disaster risk varies according to the fracture length, fracture width, fracture area and surface displacement for a fault line [40]. The residential areas are disadvantaged in terms of earthquake risk while a dense population lives close to fault lines and are located in areas where there is liquefaction of the ground [41].…”

Section: Datamentioning

confidence: 99%

The Multi–Disaster risk assessment: A-GIS based approach for Izmir City

PARTİGÖÇ,

DİNÇER

2024

International Journal of Engineering and Geosciences

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Urban settlements currently face many disasters that are increasing in number and frequency every day such as floods, landslides, sea level rise, storms, drought, forest fires, etc. due to the negative consequences of global climate change caused by significantly exceeding the carrying capacity of nature. Cities are currently becoming less resistant to disaster risks because of the unhealthy settlements. These settlements are becoming widespread in terms of physical, economic and social conditions as a natural result of the urbanization in which planning processes are carried out in an uncontrolled and unsupervised manner. This situation makes it a necessity to develop strategies and policies aimed at reducing and/or eliminating possible disaster damages which are defined as high risk. From this viewpoint, the study aims to reveal the current disaster risks in urban areas with a dense population and building stock. Izmir city is determined as the study area. Spatial analyses are performed for disaster risk by using Geographical Information Systems (GIS) tools and Weighted Overlap method considering the natural and built environment elements that significantly affect the disaster risk. The findings obtained from the study and the determinations made within the scope of the Izmir Provincial Disaster Risk Reduction Plan (IRAP) prepared by the Disaster and Emergency Management Presidency (AFAD) are evaluated comparatively. As a result, it has been seen that the determinations put forward for disaster risks have shown consistency throughout Izmir city and the studies carried out at the local level have been prioritized in such a way as to be aimed at risk management and prevention planning by the time.

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Section: Datamentioning

confidence: 99%

The Multi–Disaster risk assessment: A-GIS based approach for Izmir City

PARTİGÖÇ,

DİNÇER

2024

International Journal of Engineering and Geosciences

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Orta yükseklikteki hasar görmüşbetonarme bir binanın hasargörebilirliğinin incelenmesi

Çiftçi¹,

Kara²,

Fahjan³

2018

Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi

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Highlights: Graphical/TabularAbstract  Fragility curves of nondamaged structural systems  Fragility curves of damaged structural systems  Disaster and risk management Figure A. Estimation and Comparison of Damage Probability for Non-Damaged and Damaged Structural Systems Purpose: The purpose of this study is to demonstrate the importance of determining correct representative fragility curves for previously damaged buildings to achieve effective disaster planning and risk management. Theory and Methods: In order to estimate the performance and damage levels of previously damaged structures after a next earthquake, a midrise reinforced concrete structure-which is damaged in an earthquake but still in use-is selected. Nonlinear time history analysis is performed for the 3D model of structural system exposed to previously recorded earthquake motion using SAP2000 software. Based on the resulted plastic rotation values of the structural elements, the damage level of the analyzed model is verified with real damage of the structure. After that, nonlinear static analyses of the two models are performed with Sap2000 and the story drift ratios and the spectral displacements are obtained. Using HAZUS drift ratio threshold values and lognormal standard deviation values, fragility curves are derived for two models separately. Using the new "Earthquake Hazard Map of Turkey" damaged and non-damaged structural system spectral displacements are determined for three earthquake Levels, DD-1, DD-2, DD-3. Using these spectral displacements, damage levels can be estimated from the derived fragility curves and compared for damaged and undamaged. Results: In terms of disaster planning and risk management, the total damage rate above the moderate damage level is of great importance to determine loss of life and shelter requirement ratios. The study concluded that If the damaged structure is re-exposed to an earthquake, the total damage expected to rate over; % 33 for the DD-3 earthquake level, 30% for the DD-2 earthquake level and 15%for the DD-1 earthquake level. Conclusion: The effective implementation of the strategies, identified before a possible disaster, is very important in terms of reducing the negative consequences of the disasters so it should be estimated correctly. Therefore, both of accurate assessment of existing building stock and accurate evaluation of fragility curves of the studied area key points to make a proper damage estimation and a successful disaster management.

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Düzce İli İçin Senaryo Bazlı Risk Değerlendirmesi

MIHÇI¹,

BAYRAKTAR

2022

Doğal Afetler Ve Çevre Dergisi

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Düzce’de 12 Kasım 1999 depreminden sonra kentsel alandaki yapıların %80'i yıkılmış ve kalıntıların kaldırılmasından sonra büyük bir alanın etkilendiği görülmüştür. 9 Aralık 1999'da Düzce, idaresi altında 20 mahalle, 97 köy ve 7 ilçe bulunan il ilan edildi. Bu çalışmada öne çıkan ana bileşenler, Kuzey Anadolu Fay Hattı civarında yer alan, tümü yapısal ve doğal ortamlardan oluşan Düzce'nin 10 kentsel mahallesidir. Bu alanlar kısaca tanımlanmış ve risk değerlendirmelerine ait bulgular sunulmuştur. Düzce ili için hazırlanan deprem senaryosu sonucunda elde ettiğimiz en önemli sonuç; Düzce ili merkez ilçesinde incelediğimiz on mahallenin fay hattı üzerinde kritik bir noktada bulunması ve burada bulunan çoğu binanın 17 Ağustos 1999 İzmit Körfezi depreminden etkilenmiş olduğu, binaların yine bu şiddette olası bir depremle karşılaşması halinde ölü ve yaralı sayısının fazla olmasında etkili olabileceğidir. Başka önemli bulgu ise; deprem risk analizlerinin temel amacı olan önceden ihtiyaç duyulabilecek çadır sayısı ve çadır için gerekli olan alanın tespitidir. Sonuç olarak; Düzce ili Merkez ilçesi özelinde yapılan bu çalışma il genelinde düşünülerek olası bir deprem ile karşı karşıya kalınması durumunda önceden gerekli tedbirlerin alınmış olmasını ve o anda daha planlı ve hızlı hareket edilerek can kaybını minimum seviyeye inmesini sağlamış olacaktır.

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Afet Planlamasında Deprem Riski Belirsizliklerinin Değerlendirilmesi

Abstract: Özet

Cited by 8 publications

References 18 publications

The Multi–Disaster risk assessment: A-GIS based approach for Izmir City

The Multi–Disaster risk assessment: A-GIS based approach for Izmir City

Orta yükseklikteki hasar görmüşbetonarme bir binanın hasargörebilirliğinin incelenmesi

Düzce İli İçin Senaryo Bazlı Risk Değerlendirmesi

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