【摘要】 本文在岩质边坡离散元模型中的岩石块体中设置虚拟节理,将滑动面切割为许多线段相连的直线段,使得模拟滑动面贯通破坏过程成为可能,进而改进了UDEC软件中的Mohr-Coulomb结构面接触模型,使其能够反映结构面在循环荷载下的退化效应。通过算例分析结果表明:考虑滑动面贯通过程的岩质边坡安全系数小于不考虑贯通过程的安全系数,且随着虚拟节理间距的减小,安全系数逐渐增大,最后趋于定值;考虑滑动面退化过程的岩质边坡的安全系数小于不考虑滑动面退化的安全系数,且随着滑动面抗损伤能力的下降,安全系数变小。更多还原

【Abstract】 By adding certain virtual joints into the intact rock in the model,the slip plane of a rock slope could be cut into several pieces of joining lines,which make possible the simulation of the progressive failure of rock slope with obvious slip plane.In addition,amending the original constitutive model of UDEC software makes it possible to simulate the progressive degradation of joints under cycling loading.The results of simulation example indicate that the calculated factor of safety is smaller than that without the consideration of the progressive degradation of slip joints and the progressive failure process of the slip plane.The safety factor of the rock slope is growing as the adding of the number of the cutting pieces of the slip plane,and reducing as the waning of the ability to resist the shear damage of the slip plane.更多还原