The Numerical and Analytical Investigation of Shallow Foundation Behaviour on Layered Soils

Abstract

A validated and calibrated finite element model has been generated using the results of the full-scale loading tests performed in the field. The affects of the footing size, initial stress state and stress history of sand layer, the thickness of upper sand layer and the undrained shear strength of lower clay layer on the bearing capacity and settlement behaviours of square footings on layered soils have been investigated by performing a series of three-dimensional finite element analyses. The bearing capacity values obtained from finite element analyses have been compared to the bearing capacity values calculated by punching shear method. Also, the variation of Ks coefficient depending on the H/B ratio and ƛs has been investigated.

Keywords

• Layered soils
• bearing capacity
• finite element method

Tabakalı Zeminlerdeki Yüzeysel Temel Davranışının Nümerik ve Analitik Olarak İncelenmesi

Abstract

Arazide yapılmış tam ölçekli yükleme deney sonuçları kullanılarak doğrulanmış ve kalibre edilmiş bir sonlu elemanlar modeli oluşturulmuştur. Temel boyutunun, kum zeminin başlangıç gerilme durumu ve gerilme geçmişinin, üstte yer alan kum tabakası kalınlığının ve altta yer alan kil tabakasının drenajsız kayma mukavemetinin tabakalı zeminlerdeki kare temellerin taşıma kapasitesi ve oturma davranışları üzerindeki etkileri gerçekleştirilen bir seri üç boyutlu sonlu elemanlar analizi ile araştırılmıştır. Sonlu eleman analizleri sonucu bulunan taşıma gücü değerleri zımbalama kesme yöntemi ile hesaplanan taşıma gücü değerleri ile karşılaştırılmış ve bunun yanı sıra Ks katsayısı değerlerinin H/B oranına ve ƛs’ e bağlı değişimi incelenmiştir.

Keywords

• Tabakalı zeminler
• taşıma gücü
• sonlu elemanlar yöntemi

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