Abstract

The article describes the lab-scale testing of dynamic instability in a block placed on a rough slope surface and subjected to small-amplitude vibrations. It is shown that the macroscopic sliding evolution is well-presented using equations of creep with the properly selected constants. According to the testing data, the necessary condition of the dynamic failure is the critical displacement along the slope and the certain creep rate. The critical displacement appears to exceed greatly the typical value when the sliding surface transits to the residual shear resistance. It is found that the landslide body instability develops at the late stage due to the phenomenon of reduction in friction at increasing sliding velocity.

中文翻译：

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地震振动作用下重力滑坡趾部摩擦减小现象

摘要

这篇文章描述了放置在粗糙斜坡表面上并受到小幅度振动的块的动态不稳定性的实验室规模测试。结果表明，使用与正确选择的常数的蠕变方程式，宏观滑动进化是很好的。根据试验数据，动态破坏的必要条件是沿边坡的临界位移和一定的蠕变速率。当滑动面转变为残余剪切阻力时，临界位移似乎大大超过了典型值。研究发现，滑坡体失稳在后期发展，这是由于滑动速度增加时摩擦力减小的现象。