An earthquake-induced landslide, mainly affected by seismic movement, is a frequent large-scale geological hazard in hydraulic engineering. This paper proposed a rate-dependent strain-softened micromechanical contact model and implemented it in discrete element method code, namely, PFC. Using the PFC-FLAC coupling scheme, the Hongshiyan earthquake landslide is analyzed as a case study. The influence of the strain rate, damping, and topographic effect is discussed. The results indicate that the rate-dependent micromechanical model can give a reasonable seismic-induced failure process compared with the in situ situation and provide a numerical technique for earthquake-induced landslide analysis and rockfall hazard prediction.

中文翻译：

---

动态应变率相关接触模型及其在红石岩滑坡中的应用

地震滑坡主要受地震运动影响，是水利工程中常见的大型地质灾害。本文提出了一种与速率相关的应变软化微机械接触模型，并在离散元方法代码中实现了它，即 PFC。使用PFC-FLAC耦合方案，以红石岩地震滑坡为例进行分析。讨论了应变率、阻尼和地形效应的影响。结果表明，与原位情况相比，速率相关的微观力学模型可以给出合理的地震诱发破坏过程，并为地震诱发滑坡分析和落石危害预测提供数值技术。