Accumulative plastic strain of thawed saturated clay under long-term cyclic loading

Lin, Bo; Zhang, Feng; Feng, Decheng; Tang, Kangwei; Feng, Xin

doi:10.1016/j.enggeo.2017.09.028

Cited by 56 publications

(9 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to study the long-term resilient response of coral sand, the number of cycles N was selected to be 20,000. Referring to the experimental studies of coarse-grained soil under traffic cyclic loading by other scholars, the cyclic loading type of this study used half-sine loading [27][28][29]. Drained cyclic triaxial tests were performed on coral sand samples at p 0 = 40, 70, 100, 200, 300, 400 kPa.…”

Section: Test Methodsmentioning

confidence: 99%

Experimental and Estimation Studies of Resilient Modulus of Marine Coral Sand under Cyclic Loading

Zhang

Ding

et al. 2020

JMSE

View full text Add to dashboard Cite

Coral sand is an important filler resource that can solve the shortage of terrestrial fillers in coastal areas. Recently, the foundations of many infrastructures in the South China Sea have been built with coral sand as fillers, which have been subjected to wave and traffic cyclic loads. Resilient modulus (Mr) is an important design parameter in marine engineering, but there are few studies on the resilient modulus response of coral sand under cyclic loading. A series of drained cyclic triaxial tests were carried out to investigate the effects of the initial mean effective stress (p0) and cyclic stress ratio (ζ) on the resilient modulus response of the coral sand from the South China Sea. The change of fractal dimension (αc) can reflect the rule of particle breakage evolution. The αc of coral sand shows a tendency of almost maintaining stable and then increasing rapidly with the increase of mean effective stress p0 under each cyclic stress ratio ζ. There is a threshold of p0, when the p0 exceeds this threshold, αc will increase significantly with the increase of p0. The increase of p0 has a beneficial effect on the improvement of the Mr, while the increase of ζ has both beneficial and detrimental effects on the improvement of the Mr. A new prediction model of the Mr considering particle breakage was established, which can better predict the Mr of coral sand in the whole stress interval. The research results can provide guidance for the design of marine transportation infrastructures, which can promote the development of marine transportation industry and energy utilization.

show abstract

Section: Test Methodsmentioning

confidence: 99%

Experimental and Estimation Studies of Resilient Modulus of Marine Coral Sand under Cyclic Loading

Zhang

Ding

et al. 2020

JMSE

View full text Add to dashboard Cite

show abstract

“…For example, Cai 8 and others took cement-improved expansive soil as the research object, pointing out that the dynamic parameter of the subgrade under the soaking state is greater than the natural state value, and subgrade soaking will promote the cumulative deformation of the subgrade. Lei and Lin 9 , 10 analyzed the influence of freeze–thaw cycle times, freezing temperature, confining pressure, and other factors on the cumulative plastic strain of subgrade soil, and created an empirical model to predict the cumulative plastic strain of soil. Sun et al 11 studied the influence of variable confining pressure on the permanent deformation of soil, and pointed out that, when constant confining pressure and variable confining pressure tests have the same maximum stress or average stress, the variable confining pressure can accumulate more permanent strain.…”

Section: Introductionmentioning

confidence: 99%

“…According to the deformation characteristics of subgrade soil under intermittent cyclic load, Nie and Li 17 , 18 and other scholars proposed empirical models to predict the cumulative plastic strain of fine-grained soil under intermittent cyclic loads. For the deformation characteristics of subgrade soil under continuous cyclic loading, Lin and Chen et al 10 , 19 proposed an empirical model of cumulative deformation of subgrade soil under continuous cyclic loading. However, a weakness is that the parameters in these empirical models are easily affected by the test environment, which makes them show strong instability in the process of predicting the cumulative permanent deformation of different soils.…”

Section: Introductionmentioning

confidence: 99%

Deformation constitutive model of subgrade soil under intermittent cyclic loading

Zhang

Chen

Xing

et al. 2023

Sci Rep

View full text Add to dashboard Cite

During the actual operation of subways, high-speed railway, and other infrastructure, subgrade soil will be subjected to periodic vibration and intermittent loading, i.e., intermittent cyclic load. To study the deformation characteristics of subgrade soil under intermittent cyclic loading, the Newtonian dashpot in the generalized Kelvin model is replaced by the fractional Abel dashpot, a fractional generalized Kelvin model is established. Then, a nonlinear viscoplastic body model considering damage is proposed, which is connected in series with the improved fractional generalized Kelvin model, and the deformation constitutive model of soil under intermittent cyclic loading is obtained. Finally, the effectiveness and applicability of the model are analyzed, and the model is compared with other constitutive models. The results show that the constitutive model established in the paper can reflect the combined effect of confining pressure, frequency, dynamic stress amplitude and other factors on the cumulative plastic strain of soil, and can well characterize the development law of three types of cumulative plastic strain curves of soil: stable, critical, and failure. The fitting parameters $$\alpha$$ α and $$\eta$$ η tend to decay and rise, respectively, with the increase in loading stage N, which reflects the rationality and accuracy of the model.

show abstract

“…Ruan et al analyzed the influences of various environmental factors on the durability of subgrade, especially the huge effects of the freeze-thaw cycle and dry-wet cycle on the durability of subgrade [6]. Lin et al [7] used a dynamic triaxial test to explore the law of accumulated plastic strain of soil samples under freezing and thawing. e greater the number of cycles, the greater the accumulated strain.…”

Section: Introductionmentioning

confidence: 99%

Soil‐Water Characteristics of the Low Liquid Limit Silt considering Compaction and Freeze‐Thaw Action

Yao

Luo

Qian

et al. 2020

Advances in Civil Engineering

View full text Add to dashboard Cite

The soil-water characteristic curve of silty soil in seasonal frozen area during freezing-thawing process was studied in this study. By means of a laboratory test, specimens with different compaction degrees and different initial moisture content were prepared and put into the temperature change testing machine for freeze-thaw action. The influence of different degrees of compaction and different times of freeze-thaw action on SWCC of low liquid limit silt was analyzed, a V-G model was used to fit the test data, and a set of fitting parameters with a reference value was obtained. At the same time, the change of microstructure between soil particles during the freezing-thawing cycle is illustrated. The results showed that with the same water content and the same compactness, the matric suction of the test soil decreased with the increase of freeze-thaw cycles. For the same number of freeze-thaw cycles, the greater the compactness, the greater the matric suction of the soil. The V-G model can well represent the SWCC of low liquid limit silt during the freeze-thaw cycle.

show abstract

Accumulative plastic strain of thawed saturated clay under long-term cyclic loading

Cited by 56 publications

References 40 publications

Experimental and Estimation Studies of Resilient Modulus of Marine Coral Sand under Cyclic Loading

Experimental and Estimation Studies of Resilient Modulus of Marine Coral Sand under Cyclic Loading

Deformation constitutive model of subgrade soil under intermittent cyclic loading

Soil‐Water Characteristics of the Low Liquid Limit Silt considering Compaction and Freeze‐Thaw Action

Contact Info

Product

Resources

About