论文部分内容阅读
为研究地震作用下岩石边坡的稳定性问题,根据实验室直剪实验结果确定了完整的岩石样本的抗剪指标参数,并根据岩体裂隙间距对其进行了弱化折减.采用有限元强度折减方法评估了含节理岩石边坡的稳定性,计算了临界滑移面的安全系数.通过Drucker-Prager破坏准则判断岩石边坡有限元模型中每个单元的滑移状态.采用准静态方法模拟岩石边坡地震作用荷载,讨论地震动力放大系数对边坡抗滑稳定性安全系数的影响.基于有限元分析结果,确定不同地震作用组合下岩石边坡在极限状态下的塑性区分布和滑移面的安全系数.
In order to study the stability of rock slope under earthquake action, the shearing index parameters of intact rock samples are determined according to the results of laboratory direct shear tests, and the shear parameters are reduced according to the crack spacing of rock mass. Finite element strength Reduction method to evaluate the stability of rock slope with jointed rock and calculate the safety factor of critical slip surface.The slip state of each element in rock slope finite element model is judged by Drucker-Prager failure criterion.The quasi-static method The effect of seismic amplification factor on the safety factor of slope stability is discussed.According to the results of finite element analysis, the plastic zone distribution and slip of the rock slope under different earthquake conditions are determined The safety factor of the sliding surface.