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Title

Numerical analysis of granular soil-structure interface behavior at large shearing displacement: evolution and characterization

Year: 1396
COI: LTBD04_112
Language: EnglishView: 254
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Authors

Babak Ebrahimian - Faculty of Civil, Water and Environmental Engineering, Abbaspour School of Engineering, Shahid Beheshti University (SBU), Tehran, Iran - The Highest Prestigious Scientific and Professional National Foundation, Iran s National Elites Foundation (INEF), Teh
Ali Noorzad - Faculty of Civil, Water and Environmental Engineering, Abbaspour School of Engineering, Shahid Beheshti University (SBU), Tehran, Iran

Abstract:

This paper presents the interface behavior between cohesionless granular soil and moving boimding structure using finite element method and a micro-polar elasto-plastic continuum model. The focus of investigation is on the consideration of rough, medium rough and relatively smooth interfaces. In this regard, plane monotonic shearing of an infmitc extended narrow granular soil layer between two parallel rigid boundaries of varying surface roughness is simulated under the conditions of constant vertical pressureand free dilatancy. To describe the essential mechanical properties of granular soil, an elasto-plastic singlehardening soil model enhanced by polar quantities i.e., Cosserat rotations, curvatures, and couple stresses is employed. Furthennore, the mean grain diameter as the material characteristic length is implemented in the model to properly predict the thickness of shear band formed along the interface as well as to consider the scale effect in the simulations. Particular attention is paid to the influence of boundary condition on theshear behavior of granular soil layer. In this regard, the additional micro-polar kinematical boundary conditions along the boundaries allow more detailed description of the surface roughness of adjoining structure. It is shown that the assumed boundary conditions have strong influences on the granular soil behavior in terms shear band thickness and mobilized interface hiction angle. For large shearing, the shear deformations and polar quantities are localized within a narrow zone, called shear band, parallel to the direction of shearing and the state quantities tend towards a stationary state. It is also revealed that the location of shear bands is different in an infinite or finite shear layer.

Keywords:

Micro-polar continuum, elasto-plasticity, interface shearing, granular soil, finite element

Paper COI Code

This Paper COI Code is LTBD04_112. Also You can use the following address to link to this article. This link is permanent and is used as an article registration confirmation in the Civilica reference:

https://civilica.com/doc/680230/

How to Cite to This Paper:

If you want to refer to this Paper in your research work, you can simply use the following phrase in the resources section:
Ebrahimian, Babak and Noorzad, Ali,1396,Numerical analysis of granular soil-structure interface behavior at large shearing displacement: evolution and characterization,4th International Conference on long-Term Behavior and Environmentally Friendly Rehabilitaion Technologies of Dams,Tehran,,,https://civilica.com/doc/680230

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Type of center: دانشگاه دولتی
Paper count: 19,327
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