APPLICATION AND COMPARISON OF MULTISTAGE TRIAXIAL COMPRESSION TEST PROCEDURES ON RECONSTITUTED ANKARA CLAY

Download

Amirahmad Vakilinezhad, M.Sc. Thesis.pdf

Date

2022-5-11

Author

VAKILINEZHAD, AMIRAHMAD

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

258
views

182
downloads

The ability to conduct conventional triaxial compression tests on multiple identical specimens is restricted by available sample quantity, sample homogeneity, as well as testing duration. Multistage triaxial testing is an alternative method to tackle this issue by using a single specimen, sheared under different confining stresses to attain the strength parameters. Although there are widely accepted procedures to decide when to stop each shearing stage and proceed to the next stress level, the applicability of these procedures on different soil types is still a question. This study examines the applicability of three MST procedures (Rational Procedure, Minimum Slope and Maximum Curvature) under two different deviator stress conditions (Sustained or Cycled) during confining stress increase. The outcome is compared to conventional triaxial test results for both drained and undrained shearing of reconstituted specimens of high-plasticity Ankara Clay. Out of the six options, the rational procedure with cycled deviator and minimum slope with cycled deviator approaches are respectively found to give the most accurate strength parameters in reference to undrained single stage and drained single stage test results. The maximum applicable number of the shearing-reconsolidation sequences before strength loss is also investigated for each MST procedure.

Subject Keywords

Triaxial Compression Test, Multistage Test, Ankara Clay, Strength Parameters, High-Plasticity Clays

URI

https://hdl.handle.net/11511/97393

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Comparison of undrained shear strength by pressuremeter and other tests, and numerical assessment of the effect of finite probe length in pressuremeter tests IŞIK, Nihat Sinan; ULUSAY, REŞAT; Doyuran, Vedat (2015-08-01) There is a wide body of research reported in the literature which compare the undrained shear strength determined from various field and laboratory tests. The pressuremeter testing equipment and the related design techniques have been continuously refined. However, the undrained shear strength (S (u)) determined from the pressuremeter test (PMT) is generally higher than that obtained from other field or laboratory tests. In this study, numerical methods to consider the effects of length to diameter ratio (L...
Control, design, and implementation of a low-cost ultracapacitor test system Eroglu, Hasan Huseyin; Hava, Ahmet Masum (2013-01-01) This paper reviews the ultracapacitor (UC) test procedures, establishes simple and economical power electronic conversion system-based UC test equipment, and experimentally evaluates the performance of a UC module. The power converter hardware structure and control algorithms of the designed system are discussed in detail. The high bandwidth and high accuracy current programming capability of the converter for the purpose of charging and discharging the UC, as required during testing, is illustrated via the...
Robust estimation and hypothesis testing under short-tailedness and inliers Akkaya, Ayşen (Springer Science and Business Media LLC, 2005-06-01) Estimation and hypothesis testing based on normal samples censored in the middle are developed and shown to be remarkably efficient and robust to symmetric short-tailed distributions and to inliers in a sample. This negates the perception that sample mean and variance are the best robust estimators in such situations (Tiku, 1980; Dunnett, 1982).
Comparison of Prognostic and Diagnostic Approaches to Modeling Evapotranspiration in the Nile River Basin Yılmaz, Mustafa Tuğrul; Zaitchik, Benjamin F; Crow, Wt; Hain, Christopher; Ozdogan, Mutlu; Chun, Jong A (2012-12-03) Actual evapotranspiration (ET) can be estimated using both prognostic and diagnostic modeling approaches, providing independent yet complementary information for hydrologic applications. Both approaches have advantages and disadvantages. When provided with temporally continuous atmospheric forcing data, prognostic models offer continuous sub-daily ET information together with the full set of water and energy balance fluxes and states (i.e. soil moisture, runoff, sensible and latent heat). On the other hand,...
Performance tests of a novel electroencephalographic data-acquisition system Usakli, Ali Bulent; Gençer, Nevzat Güneri (2007-02-16) The aim of the this study is to present some performance tests of a novel 256-channel electroencephalographic data-acquisition system. The common mode rejection ratio of the system was measured as 102 dB for signals in the electroencephalography frequency range and 154 dB for de signals. System electrical noise (referred-to-input) is 1.76 mu V (rms) (0.21 mu V/root Hz for 70-Hz bandwidth). The cross-talk rejection was found to be at 58 dB. The dynamic range of the system was found 108 dB. The performance te...

Citation Formats

A. VAKILINEZHAD, “APPLICATION AND COMPARISON OF MULTISTAGE TRIAXIAL COMPRESSION TEST PROCEDURES ON RECONSTITUTED ANKARA CLAY,” M.S. - Master of Science, Middle East Technical University, 2022.