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为了深入研究寒冷地区路堑边坡的动力稳定性,文章应用ABAQUS有限元软件建立了一个边坡数值分析模型,讨论了ABAQUS中动力分析时边界条件和阻尼的选取等关键问题。采用有限元和无限元相结合的办法处理边坡动力分析时的边界条件,通过输入加速度时程曲线,对该边坡进行了动力稳定分析。分析了寒冷地区路堑边坡在冻融前后土体强度的变化对边坡稳定性的影响。研究结果表明,路堑边坡在地震荷载作用下产生了较大的水平位移,并形成塑性贯通区。通过对比发现,冻融后路堑边坡在地震荷载作用下产生了更大的位移,并提前进入塑性区,对边坡稳定性产生了不利的影响,因此工程上应该慎重考虑。
In order to further study the dynamic stability of cutting slope in cold area, a numerical model of slope analysis is established by ABAQUS finite element software. The key problems of boundary conditions and damping selection in dynamic analysis of ABAQUS are discussed. The finite element method and the finite element method are used to deal with the boundary conditions of slope dynamic analysis. The dynamic stability of the slope is analyzed by inputting the acceleration time history curve. The influence of soil strength change on slope stability before and after freezing and thawing was analyzed. The results show that the cutting slope produces a large horizontal displacement under the seismic load and forms a plastic through zone. By comparison, it is found that after the freezing and thawing, the cutting slope has greater displacement under the earthquake load and enters the plastic zone in advance, which has an adverse effect on the stability of the slope. Therefore, the engineering should be considered carefully.