[1]杜成斌,任青文.用于接触面模拟的三维非线性接触单元[J].东南大学学报(自然科学版),2001,31(4):92-96.[doi:10.3969/j.issn.1001-0505.2001.04.022]
 Du Chengbin,Ren Qingwen.A New Three-Dimensional Nonlinear Interface Element for Modeling Joints[J].Journal of Southeast University (Natural Science Edition),2001,31(4):92-96.[doi:10.3969/j.issn.1001-0505.2001.04.022]
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用于接触面模拟的三维非线性接触单元()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
31
期数:
2001年第4期
页码:
92-96
栏目:
土木工程
出版日期:
2001-07-20

文章信息/Info

Title:
A New Three-Dimensional Nonlinear Interface Element for Modeling Joints
作者:
杜成斌 任青文
河海大学土木工程学院, 南京 210098
Author(s):
Du Chengbin Ren Qingwen
College of Civil Engineering, Hohai University, Nanjing 210098, China)
关键词:
接触面 非线性 接触单元 数值分析
Keywords:
interface nonlinear interface element numerical analysis
分类号:
TU311
DOI:
10.3969/j.issn.1001-0505.2001.04.022
摘要:
提出了一种新的模拟结构缝或接触问题的三维非线性接触单元,在本构关系上,模型同时考虑了已被大量实验证实的接触面法向和切向的非线性特性,法向采用了考虑法向变形的双曲线模型,切向采用了考虑应变硬化的双曲线模型.模拟了接触面的粘结、滑移和开裂等非线性现象.相对于其它接触单元,本文模型避免了Goodman单元等只考虑缝面变形及法向、切向参数取值的任意性,计算结果常使法向应力出现波动和过量嵌入等缺点.并据此编制了有限元计算程序,利用此程序分析了3个典型算例,验证了模型的合理性和程序的计算精度.
Abstract:
A new three-dimension nonlinear interface element for modeling joints is presented. Nonlinear characteristics of interface both in the normal and shear direction, which are testified by experiments are considered in the constitutive model. Hyperbola model containing normal deformation in the normal direction and strain hardening in the shear direction is applied in the model. Several working states such as bond, slip, and crack on interface are modeled. Compared with other contact elements, the advantages of the presented model are that it avoids the occurrence of normal stress fluctuation and over-intrusion on the interface, and avoids the arbitrariness of parameters of normal and shear stiffness of the Goodman element. The model is implemented as an element into the finite element code, and three typical examples are presented to illustrate the good accuracy of the model.

参考文献/References:

[1] Goodman R E,Taylor R L,Brekke T L.A model for the mechanics of jointd rock.J of the Soil Mechanics and Foundations,1968,94(3):660~677
[2] Desai C S,Zaman M M,Lighther J G,et al.Thin-layer element for interfaces and joints.Int J for Numerical Methods in Geomechanics,1984,8(1):19~43
[3] 卓家寿,姜弘道.带有夹层岩基的三维弹塑性分析.华东水利学报,1979(2):1~22
[4] Katona M G.A simple contact-friction interface element with applications to buried culverts.Int J Num Anal Meth Geomech,1983(7):371~384
[5] Bandis S C.Mechanical properties of rock joints.Rotterdam:Barton & Stephamsson,1993.119~122
[6] Burns J W,Richards R M.Attenuation of stresses for buried cylinders.In:Desai C S,ed.Proc Symp on Soil-Structure Interaction.Arison:Univ of Arizona,1964.80~85
[7] 邵炜,金峰,王光伦.用于接触面模拟的非线性薄层单元.清华大学学报,1999,39(2):34~38

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备注/Memo

备注/Memo:
作者简介:杜成斌,男,1965年生,博士,副教授.
基金项目:国家自然科学基金重点项目(59739180)和国家“九五”科技攻关资助项目(96?211?04?02?0411).
更新日期/Last Update: 2001-07-20