Cyclic and post-cyclic monotonic behavior of Adapazari soils

Kaya, Zülküf; Erken, Ayfer

doi:10.1016/j.soildyn.2015.05.003

Cited by 35 publications

(16 citation statements)

References 20 publications

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“…Existing results have confirmed that the induced excess pore water pressure under cyclic loading is mainly affected by soil properties and loading methods [20,21]. At present, the post-cyclic shear characteristics for different soil types [5,17,19,[22][23][24][25] and loading conditions [4,15,16,[26][27][28][29][30] has been extensively studied. Soroush and Soltani-Jigheh [5] found that the content of granular material had little effect on the post-cyclic shear strength.…”

Section: Introductionmentioning

confidence: 85%

“…In recent years, the mechanical response of soft soil after cyclic loading has been widely studied [9][10][11][12]. Generally speaking, the average effective stress decreases companion with the increase of excess pore water pressure under cyclic loading, which leads to a decrease in the post-cyclic strength of the soil [13][14][15][16][17][18][19]. The induced excess pore water pressure directly affects the degradation of post-cyclic strength.…”

Section: Introductionmentioning

confidence: 99%

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Post-Cyclic Mechanical Behaviors of Undisturbed Soft Clay with Different Degrees of Reconsolidation

Chen

Huang

et al. 2021

Applied Sciences

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Soft soil is often subjected to cyclic loading such as that imposed during storms, under traffic, or in an earthquake. Furthermore, the cyclic-loading-induced excess pore water pressure can be partially dissipated after cyclic loading. Thus, different reconsolidation processes should be considered. A series of static and dynamic triaxial tests were conducted on undisturbed soft soil to determine the post-cyclic mechanical behavior thereof, such as the variation of undrained shear strength, the development of excess pore water pressure, and the evolution of effective stress path. The effects of consolidated confining pressure, cyclic stress ratio, and degree of reconsolidation were analyzed. Results show that the trend of all stress–strain curves is similar under different conditions. The effect of the degree of reconsolidation is such that, with increasing the degree of reconsolidation, the shear strength is enhanced. Meanwhile, compared with undrained shear strength without cyclic loading, the shear strength after cyclic loading with full reconsolidation is increased. These factors also have a significant effect on the undrained shear strength: the greater both the confining pressure and cyclic stress ratio are, the higher the undrained shear strength. A positive excess pore water pressure is always observed during post-cyclic shearing process, irrespective of different factors. The S-shaped effective stress paths under different test conditions are observed and cross the critical state line. The microstructures of undisturbed soil and post-cyclic specimens with different degrees of reconsolidation were quantitatively investigated. Besides that, the degree of influence of different factors on the post-cyclic undrained strength was analyzed. Based on the test results, the undrained shear strength with cyclic load-history was well predicted by existing models.

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Section: Introductionmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Post-Cyclic Mechanical Behaviors of Undisturbed Soft Clay with Different Degrees of Reconsolidation

Chen

Huang

et al. 2021

Applied Sciences

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“…When the shear stresses on soils are large enough to generate axial unit stresses and pore water pressures, the axial unit impacts in the soil increase due to the softening of the soil. There is a deformation level at which axial strains and pore water pressure begin to increase rapidly as the effective stress decreases [12][13]. This level, which occurs before the failure deformation, is defined as the critical deformation level.…”

Section: Determination Of Critical Deformation Values Of Clean and Co...mentioning

confidence: 99%

The Liquefaction Behavior of Leachate-Contaminated of Sand under Cyclic Loads

Yaşargün,

Erken

2024

IJONFEST

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Uncontrolled solid waste affects the stress-strain behavior of the sand as well as causes an environmental problem. In this research, the effect of leachate on the dynamic behavior of sand has been studied and the results were compared with clean sand with different saturation degrees. The modified split molds at 50 mm diameter and 100 mm height were used to prepare the leachate-contaminated sand. Both contaminated and clean sand samples were prepared by dry pluviation method. After preparation, the sand samples in the modified mold were put in the leachate wastewater to keep for different cure times. Then they were installed on the dynamic triaxial test system at 0.1 Hz and the same cyclic stress ratio. During the saturation process to prevent the structure of contaminated sands from being disturbed, samples were not passed through CO2 and distilled water. Stress-controlled cyclic tests were conducted at on both clean and contaminated sand consolidated at 100 kPa isotropically. After consolidation phase the measured B values varied between 0.45-0.93. Results show that leachate-contaminated sands are more liquefiable depending on cure time at the same saturation value and saturated clean sand samples and partially saturated leachatecontaminated sand samples show similar liquefaction behavior under the same cyclic ratio.

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“…Their results showed that both pore water and pore air pressures could increase with the increase of cyclic load, with the possibility that the effective stress reduces to zero, resulting in liquefaction. Kaya and Erken [11] studied the behaviour of different unsaturated soils under cyclic seismic load. The pore water pressure, axial strain and dynamic strength were monitored during the tests, and their relationships to soil plasticity and fine content were analysed.…”

Section: Introductionmentioning

confidence: 99%

One-dimensional cyclic loading tests on saturated and unsaturated sand-clay mixtures

Khoshghalb

Shahbodagh

2023

E3S Web of Conf.

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A series of one-dimensional cyclic loading tests are carried out on three different proportions of Sydney sand – kaolin mixtures, at various initial degrees of saturation. The settlement of the samples throughout the tests is accurately monitored. The effects of the degree of saturation and frequency of the cyclic load on the evolution of the settlement during the tests are thoroughly investigated for each mixture. The settlement patterns are compared to those of saturated samples to highlight the effect of soil suction on the behaviour. The results show that soil settlement decreases while the time required for the completion of the primary consolidation increases with the decrease in the degree of saturation of the soil. This trend is more pronounced in soils with higher kaolin content. The loading frequency, however, seems to have negligible effects on the settlement behaviour of unsaturated soils under cyclic loading. The result of the study provides valuable data for future simulations and validations of various constitutive models.

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Cyclic and post-cyclic monotonic behavior of Adapazari soils

Cited by 35 publications

References 20 publications

Post-Cyclic Mechanical Behaviors of Undisturbed Soft Clay with Different Degrees of Reconsolidation

Post-Cyclic Mechanical Behaviors of Undisturbed Soft Clay with Different Degrees of Reconsolidation

The Liquefaction Behavior of Leachate-Contaminated of Sand under Cyclic Loads

One-dimensional cyclic loading tests on saturated and unsaturated sand-clay mixtures

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