scholarly journals Viscous Property of Loose Sand in Triaxial Compression, Extension and Cyclic Loading

2006 ◽  
Vol 46 (5) ◽  
pp. 665-684 ◽  
Author(s):  
Takashi Kiyota ◽  
Fumio Tatsuoka
Keyword(s):  
Cyclic Loading ◽  
Triaxial Compression ◽  
Loose Sand ◽  
Viscous Property

The behaviour of very loose sand in the triaxial compression test

1989 ◽  
Vol 26 (1) ◽  
pp. 103-113 ◽  
Author(s):  
J. A. Sladen ◽  
J. M. Oswell
Keyword(s):  
Cyclic Loading ◽  
Critical State ◽  
Strain Softening ◽  
Soil Mechanics ◽  
Triaxial Compression ◽  
State Testing ◽  
Loose Sand ◽  
Sand Liquefaction ◽  
Strain Behaviour ◽  
First Time

Very loose sand is defined as sand whose state is significantly looser than its critical state. The detailed stress-strain behaviour of very loose sand in triaxial compression is described for the first time within the framework of critical state soil mechanics. It is shown that the undrained behaviour of very loose sand under static loading can be rationalized by normalization with respect to the critical state, an approach that has been successful when applied to clays and to sands dense of critical. Strain contours in normalized stress space are presented for several sands and are shown to be remarkably consistent. The observed normalized behaviour is used to develop a simple constitutive model for the behaviour of very loose sands, based on plasticity theory. It is demonstrated that this model can be used successfully to predict the essential features of the behaviour of very loose sands in undrained and drained triaxial compression including cyclic loading conditions. The model includes the strain softening that occurs in very loose sands in conditions of impeded drainage and the cumulative increase in pore pressure that occurs during undrained cyclic loading. It can be used to predict the onset of liquefaction, a phenomenon only exhibited by very loose sands and quick clays. Key words: sand, liquefaction, triaxial test, cyclic loading, steady state testing, collapse surface.

The behaviour of very loose sand in the triaxial compression test: Reply

1990 ◽  
Vol 27 (1) ◽  
pp. 162-163 ◽  
Author(s):  
J. A. Sladen ◽  
J. M. Oswell
Keyword(s):  
Compression Test ◽  
Triaxial Compression ◽  
Triaxial Compression Test ◽  
Loose Sand

scholarly journals Relationship between monotonic and cyclic behavior of saturated soft clay in undrained triaxial compression tests

2021 ◽  
Author(s):  
Tingyu Wu ◽  
Jie Han ◽  
Yuanqiang Cai ◽  
Lin Guo ◽  
Jun Wang
Keyword(s):  
Cyclic Loading ◽  
Triaxial Compression ◽  
Soft Clay ◽  
Cyclic Behavior ◽  
Triaxial Tests ◽  
Engineering Practice ◽  
Compression Tests ◽  
Cyclic Tests ◽  
Saturated Soft Clay ◽  
Triaxial Compression Tests

Cyclic loading-induced deformation of soil is a common problem in the engineering practice. In the current practice, however, monotonic triaxial tests are more commonly used in the practice, due to the availability of apparatus and ease of operation. Thus, it will be very useful and practical if the monotonic triaxial tests can be used to evaluate the behavior of soil under cyclic loading. This study aims to find an explicit relationship between monotonic and cyclic behavior of saturated soft clay. Six monotonic and nine cyclic triaxial compression tests were conducted on undisturbed saturated soft clay under an undrained condition. The test results showed that the monotonic and cyclic tests shared the same stress-strain surface in a three-dimensional space p^'-q-ε_a. It is also found possible to evaluate the effective stress states of cyclic tests at two specific numbers of cycles, using corresponding monotonic tests. Based on these two findings, a simple procedure was then proposed to predict the peak axial strain for the saturated soft clay under different cyclic loadings based on the monotonic tests and only one cyclic test, which was further verified against more test data from the previous literature.

A critical-state constitutive model for liquefiable sand

2005 ◽  
Vol 42 (3) ◽  
pp. 830-855 ◽  
Author(s):  
SM Reza Imam ◽  
Norbert R Morgenstern ◽  
Peter K Robertson ◽  
David H Chan
Keyword(s):  
Constitutive Model ◽  
Critical State ◽  
Stress Ratio ◽  
Large Strain ◽  
Triaxial Compression ◽  
Loose Sand ◽  
Inherent Anisotropy ◽  
Dense Sand ◽  
Peak Point ◽  
Wide Range

This paper presents a critical-state constitutive model for sands over a wide range of void ratios and consolidation pressures in a triaxial plane. A single set of parameters, including a unique critical-state line reached at large strain, is also used in the model, and differences in behavior in triaxial compression and extension are modeled by accounting for anisotropy at small and medium ranges of strain. The model uses a capped yield surface (YS), which is characterized by its size and shape. Following evidence in past literature, the stress ratio at the peak point of the capped YS of loose sands is approximated by the stress ratio measured at the peak point of their undrained effective stress path. Yielding parameters obtained using this stress ratio are also applied in modeling dense sand behavior and drained loading. These parameters account for the effects of inherent anisotropy, void ratio, and confining pressure on yielding stresses and are readily determined from laboratory tests, but further research is required on their determination from field data. The model accounts for stress-induced and inherent anisotropies, using different parameters, which develop and evolve independently. Emphasis is placed on proper modeling of aspects of loose sand behavior that affect their susceptibility to flow liquefaction.Key words: constitutive modeling, liquefaction, loose sand, critical state, dilatancy, hardening.

Fatigue Behavior of Granite Subjected to Cyclic Loading Under Triaxial Compression Condition

2013 ◽  
Vol 46 (6) ◽  
pp. 1603-1615 ◽  
Author(s):  
Zhechao Wang ◽  
Shucai Li ◽  
Liping Qiao ◽  
Jiangang Zhao
Keyword(s):  
Cyclic Loading ◽  
Fatigue Behavior ◽  
Triaxial Compression ◽  
Compression Condition

scholarly journals Effects of Viscous Property on Residual Deformation of Geogrid Subjected to Cyclic Loading

2002 ◽  
Vol 17 ◽  
pp. 159-166 ◽  
Author(s):  
W. Kongkitkul ◽  
D. Hirakawa ◽  
F. Tatsuoka ◽  
T. Uchimura
Keyword(s):  
Cyclic Loading ◽  
Residual Deformation ◽  
Viscous Property

scholarly journals Effect of Prior Cyclic Loading on Triaxial Compression Strength of Sliding Zone Soil of the Huangtupo Landslide

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Qiong Chen ◽  
Deshan Cui ◽  
Yu Chen ◽  
Xianyu Tao ◽  
Wei Xiang
Keyword(s):  
Cyclic Loading ◽  
Loading Condition ◽  
Stress Ratio ◽  
Axial Strain ◽  
Triaxial Compression ◽  
Cycle Period ◽  
Confining Pressures ◽  
Number Of Cycles ◽  
Logarithmic Relation ◽  
Sliding Zone

Earthquakes or cyclic loadings cause significant changes in the strength characteristics of soil. These changes, especially for sliding zone soil, can lead to catastrophic landslides. Taking into account this characteristic, this paper investigates the effects of prior cyclic loading on the consolidated undrained triaxial compression strength of sliding zone soil with the KTL triaxial automated system. Our experimental results indicate that the prior cyclic loading has a significant effect on the strength behaviour of saturated sliding zone soil. Under different confining pressures, cycle periods, and number of cycles, the samples exhibit the characteristics of strain-hardening. Deviatoric stress under cyclic loading condition is smaller than that with monotonic loading condition under different confining pressures, cycle periods, and number of cycles. As the confining pressure and cycle period increase, the failure stress ratio decreases. The axial strain exhibits a steep rise first and then stays stable under a cycle period of 90 s, while the axial strain shows a linear increase with an increase in the number of cycles under a cycle period of 10 s under confining pressures of 100 kPa and 400 kPa, respectively. The logarithmic relation correlates well with the failure stress ratio in the cyclic loading tests, which preliminary validates the applicability of logarithmic relation for sliding zone soil influenced by prior cyclic loading, providing a theoretical basis and guidance for the further understanding of strength characteristics of sliding zone soil.

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