PFC2D中平行粘结参数对直剪强度参数的影响研究

Study on the Influence of Parallel Bond Parameters in PFC2D on the Direct Shear Strength Parameters

为了解PFC2D模拟室内直剪试验时平行粘结参数和直剪强度参数间的关系,以引江济淮试验工程中泥岩崩解后的颗粒级配建立模型,通过控制变量法对PFC2D中平行粘结参数对泥岩直剪强度参数的影响进行研究。结果表明:平行粘结参数对直剪强度参数的影响不具有单调性,应划分为不同的区间进行讨论;平行粘结参数对粘聚力和内摩擦角的敏感程度不同。

In order to understand the relationship between the parallel bond parameters in the PFC2 D and the direct shear strength parameters when simulating laboratory direct shear test,a model was established based on the particle size distribution after the disintegration of mudstone in the Jianghuai test project.The influence of the parallel bond parameters in the PFC2 D on the strength parameters of mudstone direct shear was studied by using the control variable method.The results show that the effects of the parallel bond parameters on the shear strength parameters are not monotonic and should be divided into different sections for discussion.The sensitivity of parallel bonding parameters to cohesion and internal friction Angle is different.