层状岩体压缩强度尺寸效应的数值分析

基金项目:

国家自然科学基金资助项目(50878212);湖南省交通厅科研基金资助项目(200020);中南大学博士后基金资助项目(200717)

NUMERICAL ANALYSIS FOR SIZE EFFECT OF STRATIFIED ROCK MASS UNDER COMPRESSION

1.
1. School of Geoscience &Environmental Engineering,Central South University,Changsha 410083,China;
2.
2. Zhongda Survey and Design Institute of Hunan,Central South University,Changsha 410075,China;
3.
3. School of Resources &Safety Engineering,Central South University,Changsha 410083,China

摘要: 采用FLAC3D建立层状岩体计算模型，分析相同长径比和不同长径比情况下层状岩体的尺寸效应机理，发现：1)对于相同长径比情况下，增加岩样直径或者高度均会导致层状岩体的压缩强度呈现非线性下降；2)不同倾角情况下，随着长径比H/D的增大，层状岩体的压缩强度表现出较为不一致的规律，岩体的强度并不是简单地取决于长径比这个变量，而是受到试样高和直径之间某个函数的影响。
- 层状岩体 /
- 压缩强度 /
- 尺寸效应 /
- 数值分析
Abstract: The model of stratified rock mass is founded by FLAC3D,the size effect of stratified rock mass is analyzed for the situation of the same and different length-diameter ratio,which shows that: 1) for the same length-diameter ratio,the increase of diameter or the height leads to the decrease of compressive strength of stratified rock mass;2) for rock samples with different structure plane inclination,with the increase of length-diameter ratio H/D,the discipline of compressive strength shows differently.The strength of rock mass depends on the certain function of length and diameter,instead of the simply parameter H/D.
- stratified rock mass /
- compressive strength /
- size effect /
- numerical analysis