New geometric restriction for the displacement-constraint points in discontinuous deformation analysis

Jian Hong Wu, Trong Nhan Do, Chun Hua Chen, Gonghui Wang

研究成果: Article

23 引文 斯高帕斯(Scopus)

摘要

A displacement-based seismic discontinuous deformation analysis (DDA) considers the influence of an earthquake by applying a time-dependent displacement constraint to simulate time-dependent ground movement of the base rock. However, unexpected variations of the base block stress and the block area in a seismic DDA may affect the block contacts with another block. This study theoretically clarifies the mechanism that causes unwanted base block distortion in a seismic DDA. A new geometric restriction is proposed for the assignment of displacement-constraint points to simulate the ground movement of two-dimensional (2D) and three-dimensional (3D) convex and concave blocks without changing the DDA algorithm. Additionally, the Daguangbao rock avalanche triggered by the Wenchuan earthquake in China is considered as a case study to demonstrate the capability of the new geometric restriction in a DDA to solve practical problems.

原文English
文章編號E4016002
期刊International Journal of Geomechanics
17
發行號5
DOIs
出版狀態Published - 2017 五月 1

All Science Journal Classification (ASJC) codes

  • Soil Science

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