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http://dx.doi.org/10.12989/gae.2018.14.6.509

Modeling of pressuremeter tests to characterize the sands  

Oztoprak, Sadik (Faculty of Engineering, Department of Civil Engineering, Istanbul University)
Sargin, Sinan (Faculty of Engineering, Department of Civil Engineering, Istanbul University)
Uyar, Hidayet K. (Faculty of Engineering, Department of Civil Engineering, Istanbul University)
Bozbey, Ilknur (Faculty of Engineering, Department of Civil Engineering, Istanbul University)
Publication Information
Geomechanics and Engineering / v.14, no.6, 2018 , pp. 509-517 More about this Journal
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.
Keywords
pressuremeter test; modified hyperbolic model; modulus evolution; small strain;
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