基于PFC^(2D)的岩土体细观参数对应力应变曲线的影响  

Influence of Microscopic Parameters on the Stress-Strain Curves of Rock and Soil Bodies Based on PFC^(2D)

作　　者：陈庆 周科 Chen Qing;Zhou Ke

机构地区：[1]贵州省交通规划勘察设计研究院股份有限公司,贵州贵阳550081

出　　处：《江苏建材》2023年第2期34-36,共3页Jiangsu Building Materials

摘　　要：快速准确的确定岩土体细观参数,对PFC模拟岩土体力学性能非常重要。采用PFC^(2D)双轴试验法,研究了线性模型中的法向刚度、切向刚度、摩擦系数、初始孔隙对应力应变曲线的影响。研究成果表明:法向刚度和切向刚度对初始应力应变的斜率和峰值强度有影响,摩擦系数对峰值强度和峰后强度有影响,初始孔隙率对峰值强度有影响。相关研究成果可为今后PFC细观参数标定提供理论指导。Simulating rock and soil mechanical properties using particle flow code(PFC)is critical to determine their meso-parameters quickly and accurately.PFC^(2D)biaxial tests explored how normal stiffness,tangential stiffness,friction coefficient and initial porosity affect the stress-strain curve in the linear model.Normal and tangential stiffness impacted the initial stress-strain slope and peak strength.Friction coefficient influenced peak and post-peak strength.Initial porosity affected peak strength.These findings provide theoretical guidance for future PFC meso-parameter calibration.The results showed that adjusting stiffness,friction and porosity parameters is key to simulating realistic rock and soil mass behavior in PFC models.The impacts of these factors should consider in developing PFC simulations of geotechnical systems.

关 键 词：细观参数 岩土体力学性能 PFC^(2D)双轴试验 应力应变曲线 

分 类 号：TG113.25[金属学及工艺—物理冶金]