Numerical simulation of cohesive discontinuities in jointed rockmass based on element partition method

CHEN Ya-xiong; ZHANG Zhen-nan

English Version Journal Login

您当前的位置：

首页 >

文章列表页 >

Numerical simulation of cohesive discontinuities in jointed rockmass based on element partition method

更新时间：2026-06-25

- Numerical simulation of cohesive discontinuities in jointed rockmass based on element partition method
- Vol. 34, Issue S2, (2013)
- 作者机构：
  
  上海交通大学船舶海洋与建筑工程学院,上海,200240
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU452
- Online First：19 November 2013，
  
  Published：2013
- 稿件说明：
移动端阅览
CHEN Ya-xiong, ZHANG Zhen-nan. Numerical simulation of cohesive discontinuities in jointed rockmass based on element partition method[J]. 2013, 34(S2).
DOI：

CHEN Ya-xiong, ZHANG Zhen-nan. Numerical simulation of cohesive discontinuities in jointed rockmass based on element partition method[J]. 2013, 34(S2). DOI：

摘要

节理岩体中富含结构面等不连续体，其中很多结构面之间具有一定黏结强度，在冲击荷载作用下会发生脱结（debond）行为，从而消耗岩体应变能。在该结构面之间的黏结性质在很大程度上决定着岩体的破坏行为，发生脱结后，结构面之间不再具有黏结强度，岩体的力学性能发生弱化。为了对该类结构面进行模拟，在改进的Xu-Needleman势函数基础上推导出结构面单元，并将其嵌入到单元劈裂法中，模拟结构面的开裂过程，当结构面完全脱结后结构面单元就转化为一般节理单元。相应地，在数值实现过程中只是将结构面单元替换为一般节理单元即可。该结构面单元与单元劈裂法相结合，能够有效地模拟节理岩体的破坏过程。

Abstract

Jointed rockmass contains numerous discontinuities. Many of them are not distinctly separated and have certain cohesive strength. The bonded interfaces enable the jointed rockmass to have a high strength. When subjected to the dynamic load

these discontinuities will debond

dissipating the strain energy accumulated in rockmass. The cohesive properties of the discontinuities govern the fracture energy of rockmass to great extent. The debonded interfaces significantly weaken the rockmass. The improved Xu-Needleman potential function can well describe the cohesive properties of cohesive discontinuities. Based on the improved Xu-Needleman potential function

the paper derives the cohesive discontinuities element. To simulate the cohesive discontinuities in a jointed rockmass

the cohesive discontinuity element is embedded into the element partition method

which allows an intact element to accommodate a discontinuity without introduction of external degrees of freedom. When the cohesive discontinuity element is identified to debond; it will be automatically replaced by a usual joint element to reflect the contact and the friction effect between the debonded discontinuities. The simulation example suggests the discontinuity element in conjunction with the element partition method is an efficient method to simulate the discontinuity debond and growth in the jointed rockmass. The perspective of the present method should be highly inspiring in simulating the failure behaviors of the jointed rockmass subjected to dynamic load.

关键词

Keywords

references

Views

1027

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

土层锚固体复合界面单元形式及力学效应研究

Coupling mechanism of seepage and heat transfer in rock fracture based on physics-informed neural networks

Influence of construction gap on the force of steel lining in compressed air storage cavern

Stability and failure mode analysis of tunnel face in composite ground with upper sand and lower clay layers

Characterization method for the three-dimensional soil cutting failure surface based on damage energy dissipation

Related Author

BI Dong-bin

YOU Zhi-jia

LIU Qun

WANG Cheng-cheng

SHI Jian

WANG Zhi-liang1

XIAO Zhi-huan1

SHEN Lin-fang1

Related Institution

College of Civil Engineering and Architecture, Shandong University of Science and Technology

Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology

State Key Laboratory of Geomechanics and Geotechnical Engineering Safety, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences

School of Mechanics and Civil Engineering, China University of Mining and Technology

State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, China University of Mining and Technology

AI问答

⁰