[1]陈小婷,黄波林.FEM/DEM法在典型柱状危岩体破坏过程数值分析中的应用[J].水文地质工程地质,2018,45(04):137.[doi:10.16030/j.cnki.issn.1000-3665.2018.04.20]
 CHEN Xiaoting,HUANG Bolin.Application of the FEM/DEM method to numerical analyses of the failure process of representative pillar-shape dangerous rockmass[J].Hydrogeology & Engineering Geology,2018,45(04):137.[doi:10.16030/j.cnki.issn.1000-3665.2018.04.20]
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FEM/DEM法在典型柱状危岩体破坏过程数值分析中的应用()
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《水文地质工程地质》[ISSN:1000-3665/CN:11-2202/P]

卷:
45卷
期数:
2018年04期
页码:
137
栏目:
环 境 地 质
出版日期:
2018-07-15

文章信息/Info

Title:
Application of the FEM/DEM method to numerical analyses of the failure process of representative pillar-shape dangerous rockmass
文章编号:
1000-3665(2018)04-0137-05
作者:
陈小婷黄波林
防灾减灾湖北省重点实验室/三峡大学,湖北 宜昌443002
Author(s):
CHEN XiaotingHUANG Bolin
Hubei Key Laboratory of Disaster Prevention and Mitigation/China Three Gorges University, Yichang,Hubei443002,China
关键词:
有限元/离散元耦合分析方法柱状危岩体应力集中裂缝延展
Keywords:
FEM and DEM coupled method (FEM/DEM)pillar-shape dangerous rockmassstress concentrationextension of the fractures
分类号:
P642.2
DOI:
10.16030/j.cnki.issn.1000-3665.2018.04.20
文献标志码:
A
摘要:
有限元/离散元耦合分析方法(FEM/DEM法)可计算连续介质的小变形,也可在新生裂缝并在裂隙间开展大变形计算。文章以位于重庆市巫山县长江左岸的箭穿洞柱状危岩体为例,分析了箭穿洞危岩体可能的破坏过程。分析表明:柱状危岩体的基座处于应力集中状态,既有拉应力集中区也有压应力集中区,应力集中造成柱状危岩体的基座附近边界岩体易破坏。应力集中新生了裂隙,裂隙的延展导致了危岩体的解体和最终的破坏。FEM/DEM方法预演了柱状危岩体压致拉裂的裂隙网络形成和破碎岩体运动过程。FEM/DEM对帮助分析大小变形混合的斜坡变形十分有利,是未来数值模拟的发展方向之一。
Abstract:
The FEM and DEM coupled method (FEM/DEM) can be used to calculate small displacement of continuum, and is also used to simulate the formation of the fracture and calculate big displacement of discontinuum. This study takes the Jianchuandong dangerous rockmass as an example, analyzing the potential failure process of the Jianchuandong dangerous rockmass. The results show that the base of the pillar-shape rockmass is in the stress concentration state, and there are tension and compressive stress concentration zones. Stress concentration can cause the failure of the boundary of the base of the pillar-shape rockmass. Fractures are new-borned by stress concentration, the extension of fracture cause the disintegrate and the final failure of the dangerous rock mass. The FEM/DEM method may pre-produce the formation of the fracture caused by the compressive stress in the pillar-shape dangerous rockmass and the whole dynamic process of the broken mass. The FEM/DEM method can help people analyze the mixture of small and big displacement in the deformation of the slope usefully, which is an important development trend in the future of numerical simulation.

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备注/Memo

备注/Memo:
收稿日期: 2017-11-08; 修订日期: 2018-03-28
基金项目: 国家自然科学基金资助项目(41372321)
第一作者: 陈小婷(1979-),女,硕士,高级工程师,主要从事水库地质灾害调查研究。E-mail:344582786@qq.com
更新日期/Last Update: 2018-07-15