Nonlinear elastic model for compacted clay concrete interface

doi:10.1007/s11709-009-0033-2

Front Arch Civil Eng Chin

2009, Vol. 3

Issue (2) : 187-194 https://doi.org/10.1007/s11709-009-0033-2

RESEARCH ARTICLE

Nonlinear elastic model for compacted clay concrete interface

R. R. SHAKIR^1,2(

), Jungao ZHU^1,2

1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; 2. Geotechnical Research Institute, Hohai University, Nanjing 210098, China

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Abstract

In this paper, a nonlinear elastic model was developed to simulate the behavior of compacted clay concrete interface (CCCI) based on the principle of transition mechanism failure (TMF). A number of simple shear tests were conducted on CCCI to demonstrate different failure mechanisms; i.e., sliding failure and deformation failure. The clay soil used in the test was collected from the “Shuang Jang Kou” earth rockfill dam project. It was found that the behavior of the interface depends on the critical water contents by which two failure mechanisms can be recognized. Mathematical relations were proposed between the shear at failure and water content in addition to the transition mechanism indicator. The mathematical relations were then incorporated into the interface model. The performance of the model is verified with the experimental results. The verification shows that the proposed model is capable of predicting the interface shear stress versus the total shear displacement very well.

Keywords interface modeling friction soil structure interface soil structure interaction simple shear test

Corresponding Author(s): SHAKIR R. R.,Email:rrshakir@yahoo.com

Issue Date: 05 June 2009

Cite this article:

R. R. SHAKIR,Jungao ZHU. Nonlinear elastic model for compacted clay concrete interface[J]. Front Arch Civil Eng Chin, 2009, 3(2): 187-194.

URL:

https://academic.hep.com.cn/fsce/EN/10.1007/s11709-009-0033-2
https://academic.hep.com.cn/fsce/EN/Y2009/V3/I2/187

Fig.1 Schematic view of simple shear apparatus

Tab.1 Main properties of clay

Fig.2 Relationship between shear stress at failure and normal stress for clay rough surface concrete interface for different water contents

Fig.3 Relationship between shear stress at failure and water content for clay-rough surface concrete interface for different normal stresses

Fig.4 Relationship between shear sliding displacement and shear deformation zdisplacement for clay rough surface concrete interface. (a) Water content=10%; (b) water content=16%; (c) water content=21%

Fig.5 Relationship between shear stress and total shear displacement in the case of clay rough concrete surface interface. (a) Water content=10%; (b) water content=16%; (c) water content=21%

Fig.6 Relationship between displacement ratio and for different water contents

Fig.7 Transformed linear of hyperbolic relation of interface shear stress-displacement. (a) Water content=10%; (b) water content=16%; (c) water content=21%

Tab.2 Parameters of interface model

Tab.3 Values of TMF: and with displacement value at end of test

Fig.8 Indirect relation between and water content for different normal stresses

Fig.9 Relation between and normal stress for different water contents

Fig.10 Comparison between experimental and calculational results. (a) Water content=10%; (b) water content=16%; (c) water content=21%

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