INVESTIGATION OF THE EFFECT ON SOIL LIQUEFACTION ANALYSIS OF EARTHQUAKE RECORD SCALING METHODS

Year 2024, Volume: 32 Issue: 3, 1500 - 1508

Ersin Güler

https://doi.org/10.31796/ogummf.1510630

Abstract

It is of vital importance to determine the liquefaction risk of water-saturated soils in earthquake zones and to take appropriate measures. In order to minimize these risks, the behavior of soils under repetitive loads should be understood in detail and this information should be taken into account in building designs. Site-specific soil behavior and response analyses should be performed to evaluate each structure on its own. In addition, it is of great importance to select the correct earthquake acceleration records and perform liquefaction analyses considering the seismicity characteristics of the region. The earthquake acceleration records used in these analyses can be scaled in time-domain and frequency-domain. However, these scaling methods may cause differences in earthquake acceleration records. These scaling methods, which are based on the peak ground acceleration (PGA) value of the region and the spectral acceleration graph recommended by the Turkish Building Earthquake Code 2019 for the region, cause changes in the earthquake acceleration record. In this study, liquefaction analyses were performed on a water-saturated soil profile at a construction site located in an earthquake zone using two different scaling methods and the effect of the scaling method on the results was examined in detail. This study provides an important contribution to future building designs and mitigation of earthquake risks.

Keywords

Liquefaction, Earthquake, Scaling earthquake, Site-specific analysis

DEPREM İVME KAYITLARININ ÖLÇEKLENDİRME YÖNTEMLERİNİN ZEMİN SIVILAŞMA POTANSİYELİNE ETKİSİNİN İNCELENMESİ

Abstract

Deprem bölgelerindeki suya doygun zeminlerin sıvılaşma riskinin belirlenmesi ve uygun önlemlerin alınması hayati önem taşımaktadır. Bu risklerin minimize edilmesi için, zeminlerin tekrarlı yükler altında göstereceği davranışın detaylı bir şekilde anlaşılması ve yapı tasarımlarında bu bilgilerin dikkate alınması gerekmektedir. Sahaya özel yapılan zemin davranış ve tepki analizleriyle her yapının kendi özelinde değerlendirilmesi gerekmektedir. Ayrıca, bölgenin depremsellik özellikleri göz önünde bulundurularak, doğru deprem ivme kayıtlarının seçilmesi ve sıvılaşma analizlerinin yapılması büyük önem arz etmektedir. Bu analizlerde kullanılan deprem ivme kayıtları, zaman-tanım ve frekans-tanım alanında ölçeklenebilir. Ancak, bu ölçeklendirme yöntemleri, deprem ivme kayıtlarında farklılıklara neden olabilmektedir. Bölgenin pik yer ivmesi (PGA) değerine ve Türkiye Bina Deprem Yönetmeliği 2019’un bölgeye önerdiği spektral ivme grafiğine göre yapılan bu ölçeklendirmeler, deprem ivme kaydı üzerinde değişikliklere neden olmaktadır. Bu çalışmada, deprem bölgesinde yer alan bir inşaat sahasında suya doygun zemin profili üzerinde iki farklı ölçeklendirme yöntemi de kullanılarak sıvılaşma analizleri gerçekleştirilmiş ve ölçeklendirme yönteminin sonuçlar üzerindeki etkisi detaylı bir şekilde incelenmiştir. Bu yönüyle çalışma, gelecekteki yapı tasarımlarının zemin özelliklerine göre yapılması ve deprem risklerinin azaltılması adına önemli bir katkı sağlamaktadır.

Keywords

Sıvılaşma, Deprem, Ölçeklendirme, Sahaya özel analiz

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