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Geomechanics and Engineering
  Volume 14, Number 6, April30 2018 , pages 509-517
DOI: https://doi.org/10.12989/gae.2018.14.6.509
 


Modeling of pressuremeter tests to characterize the sands
Sadik Oztoprak, Sinan Sargin, Hidayet K. Uyar and Ilknur Bozbey

 
Abstract
    This paper proposes a numerical methodology for capturing the complete curve of a pressuremeter test including initial or disturbed parts and loops through a stiffness-based approach adopted in three dimensional finite difference code, FLAC3D. In order to enable this, a new hyperbolic model was used to replace the conventional linear elastic model prior to peak strength of Mohr-Coulomb soil model and update or degradation of shear modulus was considered. Presented modeling approach and implemented constitutive model are impressively successful. It leads to obtain the whole set of parameters for characterizing sands and seems promising for modeling the most of geotechnical structures.
 
Key Words
    pressuremeter test; modified hyperbolic model; modulus evolution; small strain
 
Address
Sadik Oztoprak, Sinan Sargin, Hidayet K. Uyar and Ilknur Bozbey: Faculty of Engineering, Department of Civil Engineering, Istanbul University, Avcilar 34320, Istanbul, Turkey
 

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