Drained probing triaxial tests on a weakly bonded artificial soil

Malandraki, V.; Toll, D. G.

doi:10.1680/geot.2000.50.2.141

Cited by 44 publications

(22 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The yielding mechanism, the Coop and Willson criteria on weak/strong bonding [15] which will be briefly described in Section 6.2, and the strong bonding phenomenon in Reference [22] are also discussed. Several other features of naturally microstructured sands, such as particle crushing [39,49], fabric [5], anisotropy [23,24], particle shape or grade [1] and strain localization are not discussed.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A simple and efficient approach to capturing bonding effect in naturally microstructured sands by discrete element method

Jiang

Leroueil

2006

Numerical Meth Engineering

View full text Add to dashboard Cite

SUMMARYA discrete element modelling of naturally microstructured sands is very important to geomechanics. This paper presents a simple discrete element model for naturally microstructured sands with the aim to efficiently capture the effect of cementation between particles (bonds). First, a simple bond contact model was proposed by introducing a rigid-plastic bond element into the conventional contact model for dry granular material. Second, efficient numerical techniques were investigated to implement this contact model into the distinct element method (DEM). Then, a two-dimensional DEM code was developed to simulate a series of isotropic compression tests on the materials of different densities and bonding strengths. The study shows that the DEM model is able to capture the main features of naturally microstructured sands, such as variations of yielding and bulk modulus against bonding strength or material density. In addition, it is shown that the gross yielding (the yielding defined in terms of strains) is largely related to bond breakage; Coop and Willson criteria are generally reasonable; and the strong bonding in the experimental data obtained by Rotta et al. comes from that their bonded materials start at different points on the same compression line.

show abstract

Section: Introductionmentioning

confidence: 99%

“…(ii) Artificially cemented specimens made up by adding a bonding agent to soil materials, such as Portland cement, gypsum, lime, etc. [1,[17][18][19][20][21][22][23][24]. They can also be generated by more complicated processes in which several steps are needed in sequence to form bonding materials [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

A simple and efficient approach to capturing bonding effect in naturally microstructured sands by discrete element method

Jiang

Leroueil

2006

Numerical Meth Engineering

View full text Add to dashboard Cite

show abstract

“…is corresponding to the yield of links and the second yield point or F.P. is the ultimate yield point (Malandraki and Toll 2000). In this study, method of Malandraki andToll (2000, 2001), i.e.…”

Section: Stress-strain Behaviormentioning

confidence: 99%

Mechanical and Physical Characterization of Tabriz Marls, Iran

et al. 2011

View full text Add to dashboard Cite

Three types of marls can be found in the Tabriz area (Iran): yellow, green, and gray/black marls. In the present paper, strength and deformation characteristics of Tabriz marls and their stress-strain behavior are investigated by various in situ and laboratory tests. In order to study the deformation behavior of these marls, various experiments such as the pressuremeter test, plate loading test (PLT), seismic wave velocity test, uniaxial compression test, standard penetration test (SPT), and direct shear test were carried out. Ranges of strain at the elastic and failure points were determined. Young's and shear modulus were obtained. Test results showed that the strength characteristics increase with depth. The value of deformation modulus determined by the pressuremeter test was in good agreement with those obtained from the PLT. This implies that pressuremeter is a suitable in situ test for characterizing the deformation modulus of marl. Deformation modulus obtained from pressuremeter and plate loading tests were approximately 4-5 times the results of uniaxial compressive test and the deformation modulus obtained from seismic data was about 30-50 times the static deformation modulus. Stress-strain curves showed that the maximum value of strain at the elastic and failure points and the minimum value of strength and deformation modulus are corresponding to the yellow marls while the minimum value of strain and the maximum value of strength and deformation modulus are corresponding to the gray/black marls. Some empirical relationships between different characteristics of Tabriz marls were also derived.

show abstract

“…Many researchers have studied the mechanical characteristics of soils under different loading stress paths [1][2][3][4][5][6]. However, in practice, soils may be in a state of unloading stress path during the construction of earthen structures, such as foundations, tunnels, and pit excavations.…”

Section: Introductionmentioning

confidence: 99%

Calculation of Tangent Modulus of Soils under Different Stress Paths

Huang

Jiang-shu³

2018

Mathematical Problems in Engineering

View full text Add to dashboard Cite

During excavation of foundation pit, soils of different sites may undergo different unloading paths. This study focuses on the tangent modulus of soil under different stress paths and provides theoretical basis for the deformation calculation of soil. In this paper, conventional triaxial compression test and 0 consolidation unloading test were conducted with mucky soil and silty clay to obtain the deformation characteristics of soils under different stress paths. Experiment results show that the soil samples exhibit distinct stress-strain characteristics under different stress paths, but they all show nonlinearity. The initial tangent modulus increases as the consolidation confining pressure intensifies. Then, based on the test data, the power function relationship between initial tangent modulus and confining pressure under unloading was verified. Simultaneously, a hyperbola function to express stress-strain relation of soils under the 0 consolidation unloading condition was proposed and proved. Finally, the formulas of the tangent modulus under 0 consolidation unloading were established referring to the derivation of that in Duncan-Chang model. The theoretical calculation results agree well with the test results. It can expand the use of the Duncan-Chang model and improve its application to engineering practice.

show abstract

Drained probing triaxial tests on a weakly bonded artificial soil

Cited by 44 publications

References 7 publications

A simple and efficient approach to capturing bonding effect in naturally microstructured sands by discrete element method

A simple and efficient approach to capturing bonding effect in naturally microstructured sands by discrete element method

Mechanical and Physical Characterization of Tabriz Marls, Iran

Calculation of Tangent Modulus of Soils under Different Stress Paths

Contact Info

Product

Resources

About