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Aşırı Konsolide Kil Zeminlerdeki Yanal Yüklü Kazıklar için Limit Durum Moment Fonksiyonları

Limit State Moment Functions for Laterally Loaded Single Piles in Local OC Clay

Journal Name:

  • Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi

Publication Year:

  • 2009

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
Performance level of piles is usually expressed with the maximum head deflection and bending moment. Uncertainties in the performance of a pile originates from many factors such as spatial variation of soil properties, inadequate soil investigations, errors taking place in the determination of soil parameters by various testing methods, and limited calculation models. These uncertainties make it difficult for practicing engineers to effectively select the appropriate method when designing laterally loaded piles. In this study, the conventional, numerical, two and three dimensional finite element solutions of free head loading conditions are analyzed for determining the maximum deflection and moment of a laterally loaded single concrete pile in a homogenous fully saturated overcon-solidated local cohesive soil. The local clay has PI and OCR values of 35 and 6.1, respectively. While developing limit state functions via response surface method, maximum bending moment data under service load condition computed using 3D finite element analysis, which better represents the three dimensional nature of the soil-structure interaction, was used by considering the pile rigidity.
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Abstract (Original Language): 
Kazıkların performans düzeyleri genellikle maksimum kazık başı deplasmanı ve maksimum eğilme momenti ile ifade edilir. Kazık performansındaki belirsizlikler; zemin özelliklerindeki bölgesel değişiklikler, yetersiz zemin etüd çalışmaları, zemin parametrelerinin belirlenmesinde farklı deney yöntemlerinden oluşabilecek hatalar ve sinirli hesap modelleri gibi etkenlerden kaynaklanabilmek-tedir. Bu belirsizlikler, uygulamacı mühendislerin yanal yüklü kazık dizaynı için kullanacakları uygun yöntemi seçebilmesini zorlaştırmaktadır. Bu çalışmada, suya doygun homojen aşırı konsolide yerel bir kil zemindeki serbest başlı kazıkların yanal yükler altında maksimum kazık başı deplasmanı ve maksimum eğilme momenti değerlerini belirlemek için yapılmış olan konvansiyonel, sayısal ve iki ve üç boyutlu sonlu elemanlar analizleri gerçekleştirilmiştir. Yerel kil zeminin plastisite indisi ve aşırı kon-solidasyon oranı değerleri sırası ile 35 ve 6.1 dir. Tepki yüzeyi yöntemi ile limit durum fonksiyonları geliştirilirken, servis yükleri altında kazığın üç boyutlu davranışını daha iyi yansıtan üç boyutlu sonlu elemanlar analizi ile kazık rijitliği dikkate alınarak belirlenen maksimum moment değerleri kullanılmıştır.
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