中国水利水电科学研究院学报2017，Vol.15Issue(2)：89-95,7.DOI:10.13244/j.cnki.jiwhr.2017.02.002
考虑水软化-化学风化作用的岩石单轴压缩试验离散元模拟
DEM numerical simulation of rock under the influence of water softening and chemical weathering and chemical weathering in uniaxial compression test
摘要
Abstract
Rock is the major terrain in the southwest region,and the southwest area is humid.During the long-term operation of the project,the mechanical properties of rock are greatly affected by water and chemical weathering.As a result,the water softening of rock and the degradation behavior of rock happen.So it's significant to analyze the mechanical properties of rock under the influence of water and chemical weathering,which brings difficulties to exploitation.This paper use discrete element simulation (DEM) to simulate the uniaxial compression test on rock under the influence of water and chemical weathering,in which we get the stress-strain curves and microscopic information map.We can analyze the variety of the mechanical properties and failure mode of rock under the influence of water and chemical weathering from both the macroscopic and microscopic points of view.The simulation suggests that the peak strength and elastic modulu reduce with increasing saturation of rock,and failure mode of rock changes from compression shear failure to tension-shear failure.As the degree of chemical weathering increases,the peak strength of rock decreases and its brittle failure characteristics become more invisible.关键词
离散元模拟/单轴压缩试验/力学性质/化学风化Key words
Discrete element method simulation/Uniaxial compression test/Mechanical propertie/Chemical weathering分类
建筑与水利引用本文复制引用
蒋明镜,张鹏,廖兆文..考虑水软化-化学风化作用的岩石单轴压缩试验离散元模拟[J].中国水利水电科学研究院学报,2017,15(2):89-95,7.基金项目
国家973基础研究项目(2011CB013504,2014CB046901) （2011CB013504,2014CB046901）
国家自然科学基金项目(51579178) （51579178）
