摘要
本文基于PFC6.0软件的数值模拟工具,针对三轴压缩试验中的颗粒形状这一因素进行了深入研究,在引入了颗粒细长比AR、颗粒凹陷程度C这两个因素后,构建四颗粒模型来模拟真实岩块形状,并从旋转角、各向异性、滑移接触占比等细观角度进行了力学特性的研究,最后与圆形颗粒模型的数值模拟结果作对比,得到了在重点考虑变形的情况下,圆颗粒会低估位移量的结论,造成工程风险。
Based on the numerical simulation tool of PFC6.0 software, this paper conducts an in-depth study on the factor of particle shape in triaxial compression test. After introducing the two factors of particle slenderness ratio AR and particle depression degree C, four particles are constructed. The model is used to simulate the shape of the real rock block, and the mechanical characteristics are studied from the micro-angles of rotation angle, anisotropy, and slip contact ratio. Finally, the numerical simulation results of the round particle model are compared, and the key points are obtained. Considering the deformation, round particles will underestimate the conclusion of the displacement, causing engineering risks.
出处
《土木工程》
2021年第3期216-226,共11页
Hans Journal of Civil Engineering
