节理岩石地基极限承载力的有限元分析

邓楚键; 孔位学; 郑颖人

doi:10.13204/j.gyjz200512015

节理岩石地基极限承载力的有限元分析

doi: 10.13204/j.gyjz200512015

1.
后勤工程学院土木工程系重庆 400041

详细信息

作者简介:
邓楚键男 1978年10月出生博士研究生

中图分类号: TU470.3
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- 被引次数: 0
出版历程
- 收稿日期: 2005-06-18
- 刊出日期: 2005-12-20

ANALYSIS OF THE ULTIMATE BEARING CAPACITY OF JOINTED ROCK FOUNDATIONS BY FEM

1.
Department of Civil Engineering,Logistical Engineering University Chongqing 400041

摘要

摘要: 应用有限元法对节理岩石地基进行了数值模拟，其中夹层模型与接触模型的计算结果都比较稳定，计算精度都比较高，但接触模型在建模过程中比较繁琐，故通过采用夹层模型对存在单个节理的岩石地基进行数值分析，其结果表明：有单个节理的地基的极限承载力并不随着该节理倾角的变化而单调递增或递减；随着倾角的逐渐增加，极限承载力先是逐渐减少到一个最小值，而后逐渐增加。节理强度对岩石地基的极限承载力影响很大，但当节理倾角比较小或比较大时，节理的强度对计算结果的影响并不显著。另外，节理的位置也有较大的影响，当节理深度距基础很近时，极限承载力大幅降低。在实际工程中，对于节理岩石地基的极限承载力要慎重分析。
- 有限元 /
- 节理岩石地基 /
- 极限承载力
Abstract: The mechanical properties of the joint can be described by the sandwich model or by contact model in FEM analysis.The ultimate bearing capacity of jointed rock foundations is analyzed by elastic-plastic FEM.The results show the ultimate bearing capacity of jointed rock foundations first deceases and then increases as the obliquity of the joint increases.The strength of the joint affects the ultimate bearing capacity of jointed rock foundations greatly unless the obliquity is too small or too large.The location of the joint also affects the ultimate bearing capacity of jointed rock foundations.In engineering practice, the effects of joint should be considered carefully.
- FEM /
- jointed rock foundation /
- ultimate bearing capacity