摘要
为了确定岩石在单轴压缩下岩石端部的垂直应力分布,采用Flac 3D有限差分软件对高刚度承压板下不加垫块和加垫块两种情况岩石试样端部垂直应力分布进行分析。结果表明,不加垫块时,岩石端部应力分布不均,呈"W"形分布,中部应力较高,两端应力小;加垫块时,岩石端部应力分布呈"抛物线"形分布,中部应力较高,两端应力较小。因此,可以得出结论,岩石端部效应是不可避免的,加垫块后对抑制端部效应的作用不是很大。
In order to determine the stress distribution at rock sample ends under uniaxial compression,the vertical stress distribution at the ends of the rock samples was analyzed by using 3D Flac finite difference software under the condition of bearing plate without high stiffness bearing plate（ without pad）,or with high stiffness bearing plate（ with pad） for different rock samples under uniaxial compression. The result showed that when under the bearing plate without pad,distribution of stress at rock ends is uneven and ＂ w＂- shaped,the stress is smaller at both ends and bigger in the middle; when under the bearing plate with pad,distribution of stress at rock ends is ＂ parabola ＂- shaped,stress in the middle is bigger,and at the both ends is smaller. Therefore,it can be concluded that the end effect of rock is inevitable,and the effect of inhibition to the rock ends with pad is not obvious.
出处
《安徽理工大学学报（自然科学版）》
CAS
2015年第3期59-62,共4页
Journal of Anhui University of Science and Technology:Natural Science
关键词
单轴压缩
承压板
垫块
刚度
应力分布
uniaxial compression
bearing plate
pad
stiffness
stress distribution
