楔形块体的动力稳定分析

The Dynamic Stability Assessment of Wedge Blocks

讨论了在动力作用下楔体的稳定性 ,给出了在竖向和两个互相垂直的水平方向的地震力作用下的动安全系数计算公式 ,讨论了几种特殊情况并与相关实验进行了对比分析。提出了由于相差的影响 ,楔体不同部位的地震力系数有差别的观点。进行了数值解和理论解的对比分析 ,二者较为吻合。在作者定义的x方向的地震波作用下 ,楔体会出现单滑 ,并给出楔体的动安全系数的历时变化曲线。得出的理论成果可运用于边坡稳定分析和边坡加固处理。

This paper discusses the dynamic stability of wedge blocks and gives the formulas of dynamic safety factors under the two perpendicular horizontal earthquake accelerations and the vertical earthquake acceleration. Some special situations of wedge blocks are analyzed,and corresponding safety behavior is compared with test results. Because of the phase shift, the earthquake coefficient varies in different parts of wedge. The calculated and the theoretical results are good in agreement. Unter the action of the x direction earthquake wave defined in this paper, the wedge blocks will slide on single side. The history of dynamic safety factor of wedge block can also be computed.The results are essential for slope stability and reinforcement.