Water Science and Engineering 2011, 4(3) 305-316 DOI:   10.3882/j.issn.1674-2370.2011.03.007  ISSN: 1674-2370 CN: 32-1785/TV

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 interface element
constitutive model
programming in FISH environment
WU Hai-Min
束 一-鸣
ZHU Jun-Gao
Article by Wu,H.M
Article by 束,一.鸣
Article by Zhu,J.G

Implementation and verification of interface constitutive model in FLAC3D

Hai-min WU*1, Yi-ming SHU1, Jun-gao ZHU2

1. College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, P. R. China
2. Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, P. R. China


Due to the complexity of soil-structure interaction, simple constitutive models typically used for interface elements in general computer programs cannot satisfy the requirements of discontinuous deformation analysis of structures that contain different interfaces. In order to simulate the strain-softening characteristics of interfaces, a nonlinear strain-softening interface constitutive model was incorporated into fast Lagrange analysis of continua in three dimensions (FLAC3D) through a user-defined program in the FISH environment. A numerical simulation of a direct shear test for geosynthetic interfaces was conducted to verify that the interface model was implemented correctly. Results of the numerical tests show good agreement with the results obtained from theoretical calculations, indicating that the model incorporated into FLAC3D can simulate the nonlinear strain-softening behavior of interfaces involving geosynthetic materials. The results confirmed the validity and reliability of the improved interface model. The procedure and method of implementing an interface constitutive model into a commercial computer program also provide a reference for implementation of a new interface constitutive model in FLAC3D.

Keywords  interface element    constitutive model    FLAC3D    programming in FISH environment  
Received 2011-01-08 Revised 2011-04-18 Online: 2011-09-30 
DOI: 10.3882/j.issn.1674-2370.2011.03.007

This work was supported by the National Natural Science Foundation of China (Grant No. 51079047).

Corresponding Authors: Hai-min WU
Email: haimin-wu@hotmail.com
About author:


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