Scholarlink

<p>The southeastern Tibetan Plateau, located within the highly active Eastern Himalayan Syntaxis, experiences frequent strong earthquakes that induce significant rock mass fracturing and slope weakening. However, assessing the seismic dynamic response of slopes in this region remains challenging due to complex topography and a scarcity of in situ monitoring data. To address this, seismic stations were deployed at two high mountain slopes—Zelongnong (ZLN) and Badengze (BDZ)—to record signals from the 4.6-magnitude Medog earthquake. Combined with FLAC3D numerical simulations, this study systematically analyzes the dynamic response characteristics and failure mechanisms of these slopes under strong seismic shaking. The results demonstrate that the predominant frequency of the ZLN slope (1.63–4.89&#xa0;Hz) is higher than that of BDZ (0.72–2.92&#xa0;Hz), indicating a more complex internal geological structure at ZLN. Both sites exhibit significantly stronger horizontal than vertical dynamic responses. Numerical simulations reveal that under strong seismic loading, the ZLN slope fails primarily through a “tension–shear slip” mode, while the BDZ slope undergoes typical “spalling–sliding” failure. These distinct failure behaviors are attributed to differences in geological structure, topographic features, and elevation effects. This study provides new observational evidence and theoretical insights into the seismic dynamic response and disaster mechanisms of high mountain slopes in alpine gorge regions. </p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Seismic-induced dynamic response and instability characteristics of high mountain slopes in the Yarlung Tsangpo Grand Canyon, Tibetan Plateau, China

  • 期刊论文

  • 发表日期：

    2026年3月30日

查看全文
  • Mengchen Wang,
  • Jiawei Wan,
  • Bin Li,
  • Yang Gao,
  • Wenpei Wang,
  • Haowen Li,
  • Hewei Li,
  • Qixing Lin,
  • Jiangshan Li

摘要

The southeastern Tibetan Plateau, located within the highly active Eastern Himalayan Syntaxis, experiences frequent strong earthquakes that induce significant rock mass fracturing and slope weakening. However, assessing the seismic dynamic response of slopes in this region remains challenging due to complex topography and a scarcity of in situ monitoring data. To address this, seismic stations were deployed at two high mountain slopes—Zelongnong (ZLN) and Badengze (BDZ)—to record signals from the 4.6-magnitude Medog earthquake. Combined with FLAC3D numerical simulations, this study systematically analyzes the dynamic response characteristics and failure mechanisms of these slopes under strong seismic shaking. The results demonstrate that the predominant frequency of the ZLN slope (1.63–4.89 Hz) is higher than that of BDZ (0.72–2.92 Hz), indicating a more complex internal geological structure at ZLN. Both sites exhibit significantly stronger horizontal than vertical dynamic responses. Numerical simulations reveal that under strong seismic loading, the ZLN slope fails primarily through a “tension–shear slip” mode, while the BDZ slope undergoes typical “spalling–sliding” failure. These distinct failure behaviors are attributed to differences in geological structure, topographic features, and elevation effects. This study provides new observational evidence and theoretical insights into the seismic dynamic response and disaster mechanisms of high mountain slopes in alpine gorge regions.