大理岩三轴压缩试验的颗粒流模拟

Simulation of Triaxial Tests of Marble Samples through the Particle Flow Code

进行了大理岩在不同围压下的三轴压缩颗粒流模拟,通过试验对比分析,发现经由颗粒流单轴压缩试验模拟得到的微观参数可以较好地应用到三轴压缩试验模拟中;颗粒流程序可以较好地模拟大理岩在单轴、三轴压缩试验中的强度变形特性,得到的强度参数与试验值差距较小,但弹性模量无法反映实际试验中的变化过程,泊松比存在较大差距。

The paper simulates triaxial tests of marble under different confining pressures by the particle flow code （PFC）. It is noted that the micro parameters derived from the uniaxial tests can be used to simulate triaxial tests. The comparisons between the results of PFC numerical simulations and laboratory test show good agreement with the tested Mohr--Coulomb strength parameters. However, the PFC simulations could not reflect the change of the elastic modulus in the actual testing. The significant differences also exist in the tested and simulated Poisson＇s Ratio values.