基于ABAQUS强度折减法的边坡稳定性影响因素分析

摘要

The finite element strength decreasing principle and the influencing factors of slope stability are discussed and analyzed respectively , and the implementation method of strength decreasing principle on ABAQUS is put forward in this paper .Strength decreasing algorithm based on ABAQUS is used to build calcu‐lation model ,the security index of which is illustrated to be reliable compared with the security index of limit e‐quilibrium method .The results indicate that the method to calculate security index by using ABAQUS strength decreasing algorithm is reasonable and applicable ,the cohesion and the internal friction have the most decisive effect on slope stability ,influence of dilatancy angle is relatively smaller ,the elastic modulus and Poisson ratio have no effect on the stability of slope and Poisson ratio has a great effect on the plastic zone of slope ,which is of certain theoretical and practical significance to engineering construction and study of slope stability .%通过探讨有限元强度折减原理，提出强度折减理论在ABAQUS中的实现方法，对边坡稳定影响因素进行了分析研究。采用基于ABAQUS强度折减的方法，建立了计算模型，并与极限平衡法所得安全系数进行了对比。结果表明：采用ABAQUS强度折减法计算安全系数的方法是合理可行的；土体强度参数粘聚力和内摩擦角对边坡稳定性影响显著，剪胀角影响相对较小，弹性模量和泊松比无影响，但边坡塑性区分布受泊松比影响显著。结论对工程建设、边坡稳定性研究有一定的理论和实践意义。