Düşük Deformasyon Seviyelerinde Kumların Dinamik Özelliklerinin Resonant Kolon Deneyi Yardımıyla Belirlenmesi

Year 2020, , 572 - 580, 31.05.2020

Ersin Güler , Kamil Bekir Afacan

https://doi.org/10.31202/ecjse.678440

Abstract

Zeminlerin dinamik özelliklerinin belirlenmesi geoteknik mühendisleri için önemlidir. Depremler nedeniyle zeminlerin gerilme-deformasyon ve mukavemet özellikleri değişmektedir. Bunun sonucunda, zeminlerde deformasyonlar meydana gelmekte ve yapısal hasarlar oluşmaktadır. Deprem bölgelerinde inşa edilecek yapılar için zeminlerin dinamik özelliklerinin belirlenmesi büyük önem taşımaktadır. Meydana gelebilecek hasarların en aza indirilmesi için zeminlerin tekrarlı yükler altında göstereceği davranışın bilinmesi ve tasarımında dikkate alınması gerekmektedir. Bu amaç doğrultusunda farklı kum numunelerinin dinamik özelliklerinin belirlenmesi üzerine çalışma yapılmıştır. Rezonant kolon deney sistemi ile küçük deformasyon seviyelerinde elde edilen veriler değerlendirilmiştir. Yapılan deneyler sonucunda farklı özelliklerdeki numunelere ait kayma modülü ve sönüm oranı eğrileri elde edilmiş ve farklılıklar ve benzerlikler tartışılmıştır.

Keywords

Rezonat kolon, Dinamik Özellikler, Kayma Modülü, Sönüm Oranı

Evaluation of Dynamic Properties of Sands with Low Deformation Levels Determined by Resonant Column Test

Abstract

Determining the dynamic properties of soils is important for geotechnical engineers. Stress-deformation and strength properties of soils change due to earthquakes. As a result, deformations occur in the soil and structural damage develop. Determining the dynamic properties of soils is of great importance for the structures to be built in earthquake zones. In order to minimize the possible damages, the behavior of the soils under cyclic loads should be determined and taken into consideration in design. For this purpose, different sand samples were tested to understand the dynamic properties of soil. In the study, experiments were carried out using the resonant column test system in order to determine dynamic behavior at the small deformation levels of the clayey sand samples obtained from site with Toyoura sand widely used in the literature. As a result of the experiments, the shear modulus and damping ratio curves of the samples with different properties were obtained and differences and similarities were discussed.

Keywords

Resonant column, Dynamic properties

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