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