SIVILAŞIR YADA SIVILAŞMAZ ZEMİNLERİN YİNELEMELİ GERİLME ORANINA BİR SEÇENEK

Bu çalışmada, yinelemeli (tekrarlı) yüklerin belirlenmesi için kullanılan deprem ile zemin parametrelerine, zeminin kayma dalga hızları (Vs) ve deprem dalgasının hakim periyodu da (T) eklenerek alternatif bir analitik ilişki geliştirilmiş ve kayma gerilme oranı (KGO) olarak isimlendirilmiştir. KGO 202 adet alan verisi üzerinde uygulanmış ve sonuçların daha önce kullanılan matematiksel bağıntının (CSR) sonuçlarıyla karşılaştırılmıştır. Sonuç olarak sıvılaşan zeminlerde hesaplanan yinelemeli gerilme oran değerlerinden KGO, CSR’den daha büyük, sıvılaşmayan zeminlerde ise daha küçük olduğu görülmüştür. Ayrıca KGO ile CSR arasında doğrusal bir ilişki belirlenmiştir

Anahtar Kelimeler:

Kayma dalga hızı, Yinelemeli gerilme oranı, Suya doygun zemin, Sıvılaşır zemin, Sıvılaşmaz zemin

AN APROACH FOR CYCLIC STRESS RATIO OF LIQUEFIED OR UNLIQUEFIED SOILS

In this paper an alternative analytical relationship is developed that adds soil shear wave velocities (Vs) and earthquake dominating period (T) to an earthquake and soil parameters used in the determination of cyclic loads. This relation is named as shear stress ratio (KGO). KGO is applied to 202 field data and the results are compared in accordance with the results of mathematical relation (CSR) used before. Consequently, KGO value for liquefied soil is bigger than CSR. Whereas, KGO value of unliquefied soils is smaller than CSR. A linear relation is determined between KGO and CSR

Keywords:

Shear wave velocity, Cyclic stress ratio, Water-saturated soils, Liquefied soil, Unliquefied soil,

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