Extension of three-dimensional discontinuous deformation analysis to frictional-cohesive materials

Hong Zhang, Shu guang Liu, Guang qi Chen, Lu Zheng, Ying bin Zhang, Yan qiang Wu, Pei deng Jing, Wei Wang, Zheng Han, Gui hui Zhong, Sha Lou

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


This paper extends three-dimensional discontinuous deformation analysis (3-D DDA) to model the frictional-cohesive failure behavior of geotechnical materials and structures. Firstly, a new contact detection scheme was developed to successfully identify the dominant sub-contacts and areas of the joints between arbitrarily shaped polyhedral blocks. Secondly, a modified joint contact model subjected to the Mohr-Coulomb failure criteria based on distributed cohesion instead of concentrated cohesion, was proposed to ensure the accuracy of the simulation by 3-D DDA. Thirdly, the extended 3-D DDA was verified by three examples, including joint contact detection, critical stability and failure mode of a system of polyhedral blocks. Finally, the complete failure process involving large displacement and rotation of multiple interaction blocks is exhibited dynamically. Overall, these examples exhibit that the extended 3-D DDA is now capable of accurately modeling the failure behavior of frictional-cohesive materials and structures, so as to optimize the material and structure stabilization or protection design.

Original languageEnglish
Pages (from-to)65-79
Number of pages15
JournalInternational Journal of Rock Mechanics and Mining Sciences
Publication statusPublished - Jul 1 2016

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology


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