长江科学院院报2018，Vol.35Issue(3)：26-33,44,9.DOI:10.11988/ckyyb.20171081
岩样单裂隙几何参数对其破坏模式与强度的影响
Influence of Flaw Parameters on the Failure Mode and Strength of Single-flawed Rock Specimens
摘要
Abstract
In tests of rock specimens containing single flaw,researching the crack types and failure modes are con-ducive to predicting the initiation and propagation of cracks;yet in engineering design,the bearing capacity,name-ly damage strength,should receive more attention. In order to investigate into the relation between crack and rock strength, we built numerical models for corresponding test specimens in FLAC3D, and furthermore researched the influence of single crack's geometric parameters (inclusive of inclination angle, length, and thickness) on thedamage strength of rock specimens by adjusting the parameters in numerical model. Results revealed that the peakstrength of specimen declined continuously as crack length increased; while when inclination angle increased, peakstrength displayed a trend of increasing in general, increasing slowly when inclination angle was smaller than 60°and rapidly when inclination angle was larger than 60°. Within the test range, peak strength remained unchanged asflaw thickness increased.关键词
单裂隙/FLAC3D/单轴压缩/几何参数/峰值应力/破坏模式Key words
single flaw/FLAC3D/uniaxial compression/geometric parameters/peak strength/failure mode分类
建筑与水利引用本文复制引用
杨横涛,林杭..岩样单裂隙几何参数对其破坏模式与强度的影响[J].长江科学院院报,2018,35(3):26-33,44,9.基金项目
国家自然科学基金项目(51474249,51774322) （51474249,51774322）
中南大学"创新驱动计划"项目(2016CX019) （2016CX019）
河南省瓦斯地质与瓦斯治理重点实验室开放基金项目(WS2013A01) （WS2013A01）
