工程科学学报2017，Vol.39Issue(4)：494-501,8.DOI:10.13374/j.issn2095-9389.2017.04.003
单压下节理密度及倾角对类岩石试件强度及变形的影响
Effect of the density and inclination of joints on the strength and deformation properties of rock-like specimens under uniaxial compression
摘要
Abstract
The effects of the combination of joint density and inclination on the strength and deformation characteristics of rock-like specimens containing open joints were studied by using uniaxial compression tests.The following conclusions were made: with the increase of joint inclination,the stress-strain curve changes from a multi-peak value to a single peak value and the brittleness of the specimen enhances,whereas the ductility of the specimen weakens.The influence of joint density on the unified peak strength is related to the size of joint inclination,and the effect of joint density on the unified modulus shows a "V" shape,namely,the unified elastic modulus first decreases and then increases with the increase of joint density.With the increase of joint inclination,the unified elastic modulus increases gradually and its maximum value,which achieves 70％-80％of the complete specimens` elastic modulus,appears at 90° of joint inclination.The joint inclination is the major influencing factor on the unified peak strength and the unified elastic modulus of the rock-like specimens containing many joints.Further analysis on the test results demonstrates that the transformation law of the relationship between the joint density or joint inclination and the stress-strain curve,as well as the unified peak strength and the unified elastic modulus,is related to the failure process of the specimen.The failure mode of the specimen can be classified into three categories: tension failure,shear failure,and mixed failure.关键词
类岩石试件/岩石节理/倾角/密度/单轴压缩/峰值强度/弹性模量/破坏模式Key words
rock-like specimens/rockjoints/inclination angle/density/uniaxial compression/peak strength/elastic modulus/failure modes分类
建筑与水利引用本文复制引用
王佩新,曹平,蒲成志,范祥,陈瑜,王聪聪..单压下节理密度及倾角对类岩石试件强度及变形的影响[J].工程科学学报,2017,39(4):494-501,8.基金项目
国家自然科学基金资助项目(10972238) （10972238）
中南大学硕士生自主探索创新项目(2016zzts448) （2016zzts448）
