Effect of Energy Ratio Correction Factor in Analyzing Soil Liquefaction Potential Based on TEC-2018

Öz

Liquefaction potential is determined using simplified liquefaction assessment in TEC-2018. The energy ratio correction factor (CE) is a coefficient depending SPT hammer type. In this study, the effect of CE on the factor of safety (FS) against liquefaction was investigated. The smallest (0.90), average (1.25), and largest (1.60) CE for the automatic trip hammer in TEC-2018 were considered. For this study, a console application was developed, and analyses varying CE were limited until two and three times TEC-2018 safety condition. The safe solutions percentages were calculated as 11.28%, 18.81%, and 30.88% in FS=[0,2.2]; 20.28%, 27.55% and 38.32% in FS=[0,3.3] for CE=0.90, 1.25 and 1.60, respectively. Consequently, the change in safe solutions was 18-20% from CE=0.90 to 1.60.

Anahtar Kelimeler

• Soil liquefaction
• Energy ratio correction factor
• Liquefaction analysis
• Energy efficiency
• Geotechnics

TBDY-2018 Esaslı Zemin Sıvılaşma Potansiyelinin Çözümlenmesinde Enerji Oranı Düzeltme Katsayısının Etkisi

Öz

TBDY-2018’e göre sıvılaşma potansiyeli; basitleştirilmiş zemin sıvılaşma değerlendirmesiyle belirlenebilmektedir. Enerji oranı düzeltme katsayısı (CE), SPT deneyindeki tokmak (şahmerdan) tipine göre belirlenen bir düzeltme katsayısıdır. Bu çalışmada, CE katsayısının, sıvılaşmaya karşı güvenlik sayısı (GS) üzerindeki etkisi araştırılmıştır. TBDY-2018’de otomatik darbeli tokmak için verilen en küçük (0.90), ortalama (1.25) ve en büyük (1.60) CE değerleri ele alınmıştır. Bu makaleye özgü, TBDY-2018 esaslı sıvılaşma çözümlemesi yapabilen bir konsol uygulaması geliştirilerek değişen CE katsayıları için çözümlemeler, güvenlik koşulunun iki ve üç katıyla sınırlandırılmıştır. Sıvılaşmaya karşı güvenli çözümlerin oranı; CE =0.90, 1.25 ve 1.60 için sırasıyla, GS=[0,2.2] aralığında %11.28, %18.81 ve %30.88; GS=[0,3.3] aralığında %20.28, %27.55 ve %38.32 olarak hesaplanmıştır. Sonuçta, güvenli çözüm sayısının değişimi, CE=0.90’dan CE=1.60’a geçişte yaklaşık %18-20 arası olmuştur.

Anahtar Kelimeler

• Zemin sıvılaşması
• Enerji oranı düzeltme katsayısı
• Sıvılaşma analizi
• Enerji verimliliği
• Geoteknik

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