Hipoplastik Bünye Model Parametrelerinin Kumlu Zeminler İçin Belirlenmesi

Date

2018-09-26

Author

Bayraktaroğlu, Hilmi
Taşan, Ercan
Huvaj Sarıhan, Nejan

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Sonlu elemanlar yönteminde yapılan hesapların doğruluğu ve hassasiyeti, başka faktörlerin yanı sıra, kullanılan zemin bünye modeline bağlıdır. Hâlihazırda kullanılmakta olan çeşitli bünye modelleri (örneğin Duncan-Chang, Cam Clay vb.) mevcut olup bu modellerden biri de son yıllarda zeminler için kullanımı giderek yaygınlaşan hipoplastik bünye modelidir. Zemin gerilme seviyesinin ve birim hacim ağırlığı değişiminin zemin davranışı üzerindeki etkisinin özellikle göz önünde bulundurulduğu hipoplastik bünye modelinde rijitlik, genleşme, büzülme, pik sürtünme açısı, zemin gerilme durumu ve deformasyon yönü modelde dikkate alınan temel parametre ve kavramlardır. Toplamda sekiz parametre ile tanımlanan model, tekrarlı yüklerin zemin davranışı üzerindeki etkisini inceleyebilmek amacıyla beş parametre daha eklenerek genişletilmiştir. Bu çalışmada hipoplastik bünye modelinin on üç parametresinin belirlenmesi için gerekli laboratuvar deneyleri ve yöntemler sistematik bir şekilde açıklanmıştır. Ayrıca literatürde dinamik yük etkisi altındaki zeminlerin modellenmesinde kullanılmış olan dört farklı kumun hipoplastik bünye model parametreleri de derlenerek sunulmaktadır. Bu çalışmanın, geoteknik mühendisliğinde sonlu elemanlar yöntemi ile malzeme davranışının modellenmesi üzerine çalışan araştırmacılar için katkı sağlayacağı düşünülmektedir

Subject Keywords

Hypoplastic constitutive model, Model parameters, Laboratory experiments

URI

https://hdl.handle.net/11511/71255
https://blog.metu.edu.tr/e187152/files/2018/10/Bayraktaroglu_ZMGM2018.pdf

Conference Name

Zemin Mekaniği ve Geoteknik Mühendisliği 17. Ulusal Konferansı, 26 - 28 Eylül 2018,

Collections

Department of Civil Engineering, Conference / Seminar

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Citation Formats

H. Bayraktaroğlu, E. Taşan, and N. Huvaj Sarıhan, “Hipoplastik Bünye Model Parametrelerinin Kumlu Zeminler İçin Belirlenmesi,” İstanbul, Türkiye, 2018, vol. 2, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/71255.