A framework of an anisotropic elastoplastic model for clays

Jiang, Jinyun; Ling, Hoe I.

doi:10.1016/j.mechrescom.2010.04.004

Cited by 36 publications

(19 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These soils were characterized by an enhanced anisotropic bounding surface model with associative [17] and non-associative [11,12] flow rules. This model was implemented into the PLAXIS computer program [26] for the analyses.…”

Section: Discussionmentioning

confidence: 99%

“…The sites are modeled and simulated using the small strain finite element method. The soft cohesive soils found at these sites are characterized by an enhanced anisotropic bounding surface model with associative [17] and nonassociative [11,12] flow rules that is implemented into the PLAXIS computer program [26] as part of this study. The results of the simulations are critically assessed with relation to field observations.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Finite Element Simulation of Deep Excavation Failures

Hung

Ling

Kaliakin

2014

Transp. Infrastruct. Geotech.

Self Cite

View full text Add to dashboard Cite

Deep excavations play an increasingly greater role in the development of urban transportation infrastructure facilities such as subway systems and underground space. This paper presents the results of finite element simulations of two deep excavations in soft cohesive soils involving collapse. An enhanced bounding surface soil model characterizes the cohesive soils. The model is anisotropic and is formulated with a non-associative flow rule, but can be degenerated to an isotropic model with associative flow. The results of the excavation simulations give insight into the ground response in terms of lateral wall deflections, ground surface settlements, wall bending moments, and strut force developments. Anisotropic and isotropic versions of model showed differences in simulated results. The insignificant difference in results between the associative and non-associative versions of enhanced bounding surface model is illustrated, but it is expected that, in general, the use of non-associative flow rule will provide a more realistic simulation.

show abstract

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Finite Element Simulation of Deep Excavation Failures

Hung

Ling

Kaliakin

2014

Transp. Infrastruct. Geotech.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The elliptical yield surface of the MCC model has been modified in numerous past studies to achieve better model performance in predicting the undrained shear strength of soils (see, Yu 1998;Pestana and Whittle 1999;Ling et al 2002;Yin et al 2002;Collins 2005;Dafalias et al, 2006;Yin and Chang 2009;Jiang and Ling 2010;Yao et al 2011). We employ herein the   yield surface proposed by Collins (2005) as the bounding surface ( and  are two parameters controlling the shape of the surface) to model the behavior of OC clay.…”

Section: Bounding Surfacementioning

confidence: 99%

Dilatancy Relation for Overconsolidated Clay

2017

View full text Add to dashboard Cite

A distinct feature of overconsolidated (OC) clays is that their dilatancy behavior is dependent on the degree of overconsolidation. Typically, a heavily OC clay shows volume expansion while a lightly OC clay exhibits volume contraction when subjected to shear. Proper characterization of the stress-dilatancy behavior proves to be important for constitutive modeling of OC clays. This paper presents a dilatancy relation in conjunction with a bounding surface or subloading surface model to simulate the behavior of OC clays. At the same stress ratio, the proposed relation can

show abstract

“…Many simulations, however, were based on relatively simple constitutive models that might not have the capability to realistically describe ground movements due to complex characteristics of soils. For this reason, advanced bounding surface models (Ling et al, 2002;Jiang and Ling, 2010;Jiang et al, 2012) have recently been used in finite element excavation analyses. This paper describes the use of enhanced anisotropic bounding surface models with associative (Ling et al, 2002) and non-associative flow rules (Jiang and Ling, 2010;Jiang et al, 2012), in conjunction with the PLAXIS computer program for simulating ground movements associated with deep excavations.…”

Section: Introductionmentioning

confidence: 99%

“…For this reason, advanced bounding surface models (Ling et al, 2002;Jiang and Ling, 2010;Jiang et al, 2012) have recently been used in finite element excavation analyses. This paper describes the use of enhanced anisotropic bounding surface models with associative (Ling et al, 2002) and non-associative flow rules (Jiang and Ling, 2010;Jiang et al, 2012), in conjunction with the PLAXIS computer program for simulating ground movements associated with deep excavations. The proper implementation of the models into PLAXIS was first validated against undrained isotropic and anisotropic triaxial test results under compression and extension shearing modes for various cohesive soils.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Simulation of Deep Excavation in Soft Cohesive Soils Using an Enhanced Anisotropic Bounding Surface Model

Hung¹,

Ling

Kaliakin

2014

Geo-Congress 2014 Technical Papers

Self Cite

View full text Add to dashboard Cite

Mechanical behavior of geomaterials directly affects all geotechnical construction activities, such as embankments and excavation. The nature of soils is complex and its behavior is affected by many factors, including the fact that initial stresses existing in the natural ground are anisotropic. It is critical to develop a model that captures the salient features of soils. This study is concerned with implementing an enhanced non-associative anisotropic bounding surface model, which has exhibited a great potential to realistically describe the behavior of different types of cohesive soils, into a general purpose finite element software PLAXIS, and using it to simulate deep excavation in soft cohesive soils. The formulations are based on non-associative flow, but the model degenerates to that of associative flow in simpler form. The simulations using associative and non-associative formulations are also presented. The selected deep excavation case included the Taipei National Enterprise Center site. The results demonstrate the potential of the enhanced anisotropic bounding surface model for realistically simulating engineering applications involving ground response induced by deep excavations.

show abstract

A framework of an anisotropic elastoplastic model for clays

Cited by 36 publications

References 13 publications

Finite Element Simulation of Deep Excavation Failures

Finite Element Simulation of Deep Excavation Failures

Dilatancy Relation for Overconsolidated Clay

Finite Element Simulation of Deep Excavation in Soft Cohesive Soils Using an Enhanced Anisotropic Bounding Surface Model

Contact Info

Product

Resources

About