3D numerical analysis of shear mechanical behavior for interface between interact ional bi-body

YI Cheng; WANG Chang-jun; LIU Jin-yan; GUO Ting-ting

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3D numerical analysis of shear mechanical behavior for interface between interact ional bi-body

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- 3D numerical analysis of shear mechanical behavior for interface between interact ional bi-body
- Vol. 29, Issue 8, (2008)
- 作者机构：
  
  煤炭资源与安全开采国家重点实验室中国矿业大学（北京）,北京,100083
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU443
- Online First：02 August 2013，
  
  Published：2008
- 稿件说明：
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YI Cheng, WANG Chang-jun, LIU Jin-yan, et al. 3D numerical analysis of shear mechanical behavior for interface between interact ional bi-body[J]. 2008, 29(8).
DOI：

YI Cheng, WANG Chang-jun, LIU Jin-yan, et al. 3D numerical analysis of shear mechanical behavior for interface between interact ional bi-body[J]. 2008, 29(8). DOI：

摘要

研究岩石-岩石节理或混凝土-岩石接触面的力学行为，对于评价岩体的稳定性及工程体与岩基的稳定性有重要的意义。采用ANSYS有限元软件构建了在宽度方向一致的三维粗糙表面，模拟计算了Bandis等在玄武岩试件上的直剪试验结果，并将数值计算结果与试验结果对比，验证了ANSYS在分析两体剪切力学行为方面的可行性。此外对于有规则起伏的锯齿界面，同样进行了三维直剪试验的数值模拟，获到了不同界面和应力边界条件下的剪切强度，并与Patton剪胀公式理论值进行比较，从理论上再次验证了ANSYS模拟直剪试验的适用性。同时重点分析了直剪试验下的剪切位移曲线、接触面的剪应力分布、剪胀作用；并初步探讨了ANSYS软件自身设定凝聚力对接触面力学性能的影响。

Abstract

It is important to research the mechanical behavior of the rock/rock and rock/concrete joints for the assessment of stability issues involving rock masses and engineering foundations. A finite element model of 3D rough surface unchanged in its width is established by employing ANSYS to simulate the direct shear test conducted by Bandis et al; then compared with the test results

some moderate well numerical results are acquired

which testified that it is feasible to apply ANSYS program to analyze the bi-body shear performance. In addition

several regular sawtooth interface computational models are used to examine the shear strength theoretical formula of Patton

consequently; it is proved again that using ANSYS to model the shear behavior is applicable. Furthermore

the evaluation of this paper focuses on the analysis of the shear stress-displacement curve

shear distribution on contact plane and dilatancy effect as well as cohesion effect.

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