REZONANT KOLON DENEYİ İLE KİL ZEMİNİN DİNAMİK PARAMETRELERİNİN BELİRLENMESİ

Yıl 2018, Cilt: 6 Sayı: ozel, 211 - 218, 01.12.2018

Burak Görgün Nazile Ural

Öz

Aktif bir deprem kuşağında bulunan ülkemizde yıllardır yıkıcı depremler ile karşılaşılmaktadır. Tekrarlı yüklemeler esnasında zeminler, statik yüklemelere kıyasla farklı davranışlar sergilemektedirler. Bu davranışın önceden tespiti, olası can ve mal kayıplarının önüne geçilmesine yardımcı olacaktır. Geçmişte depremlerin hasar verici etkisinin yalnızca yapı elemanlarından ve yapı malzemesinden kaynaklı olduğu düşünülmüştür. 1960’lı yıllardan sonraki depremlerle deprem hasarına zeminlerin katkısının çok etkili olduğu görülmüştür. Bu çalışmada, temelde etkili olan düşük gerilme düzeyindeki dinamik etkinin incelenmesi için rezonant kolon testi seçilmiştir. Böylelikle, düşük gerilmeler altında dinamik parametrelerin incelenmesi için kil zeminde, farklı çevre basınçlarında aynı zeminde rezonant kolon deneyi yapılmıştır. Deney sonuçlarından çevre basıncının artmasıyla sönüm oranının azaldığı, maksimum kayma modülünün ise arttığı görülmüştür.

Anahtar Kelimeler

Rezonant kolon deneyi, Sönüm oranı, Kayma gerilmesi, Kil zemin

DETERMINATION OF DYNAMIC PARAMETERS OF CLAY WITH RESONANT COLUMN TEST

Öz

During cyclic loading,soils indicate different behaviors than static loads. In the past it was thought that the damaging effect of earthquakes was only due to the inadequate selection building elements and building materials.After 1960's it is found that soils are very effective for the earthquake’s damage and magnitude. In this study, the resonant column test is chosen to investigate the dynamic effect at low stress level, which is effective for structures such as foundation and soil works. Thus, for the analysis of dynamic parameters under low stresses, resonant column test was carried out in clay soil, at different cell pressures. As a result of the tests, with increasing cell pressure, the maximum shear modulus of the clay soil was increased while the damping ratio decreased.

Anahtar Kelimeler

Resonant column test, Damping ratio, Shear stress, Clay soil

Kaynakça

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