摘要
采用实验室研发的三维有限元分析程序,同时考虑多段式平面和曲面无厚度界面元素,在不同几何条件下,藉以分析计算黏性土内部极限值与其渐进式破坏行为,而三维有限元分析内容包含边坡和浅基础的极限承载力计算等。由分析结果可知;数值计算结果符合极限分析理论最小上限值,并显示利用三维无厚度界面元素,在不同破坏机制问题上,能模拟且预估土体极限承载力;同时,土体内部的塑性破坏情形沿既定几何滑动面逐渐破坏而达到整体破坏,可初步了解边坡和基础渐进破坏行为模式。
The object of this paper is the application of three-dimensional finite element program developed in laboratory,it can consider the multiple planes zero-thickness interface elements and calculate the bearing capacity and simulate the progressive failure mechanism in the cohesive soil. These 3D numerical studies include the ultimate bearing capacity of slope stabilities and shallow foundation. According to the obtained results,the calculation is particularly approached to the upper bound of limit analysis. It shows that the 3D interface elements can be used to predict the bearing capacity of soil,and evidently describe the progressive failure mechanism of slope and foundation stability analysis under the different geometries.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2008年第S1期2937-2945,共9页
Chinese Journal of Rock Mechanics and Engineering
关键词
数值分析
三维无厚度界面元素
黏性土
极限分析
渐进破坏
numerical analysis
3D zero-thickness interface elements
cohesive soil
limit analysis
progressive failure
