Seismic response and progressive failure patterns of shattered slopes controlled by non-persistent joints: insights from shaking table tests and numerical simulations

IF 8.4 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Engineering Geology Pub Date : 2025-09-23 DOI:10.1016/j.enggeo.2025.108384

Daping Tai , Shengwen Qi , Tao Wang

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引用次数: 0

Abstract

The non-persistent discontinuities from earthquake-induced shattering exert a dominant control on the dynamic behavior of slopes. This study investigates the seismic response and progressive failure of shattered slopes governed by these joints through large-scale shaking table tests and discrete element method (DEM) simulations. Key findings reveal that a controlling non-persistent joint shifts the peak seismic response from the crest to the vicinity of the joint opening, thereby expanding the high-response zone. Crucially, the response patterns from early, low-amplitude shaking accurately delineate the ultimate failure zone. The progressive failure mechanism evolves through three distinct stages: (1) tensile fracturing of the slope shoulder, (2) rock bridge penetration to form the primary sliding surface, and (3) propagation of a secondary sliding surface. This work clarifies the dual role of non-persistent joints in modifying seismic demand and governing failure, providing a more precise framework for assessing and mitigating seismic slope hazards.

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由非持久节理控制的破碎边坡的地震反应和渐进破坏模式：来自振动台试验和数值模拟的见解

由地震引起的破碎引起的非持续性不连续面对边坡的动力特性起主要控制作用。通过大型振动台试验和离散元法（DEM）模拟，研究了受这些节理控制的破碎边坡的地震反应和逐渐破坏。关键发现表明，控制性非持续性节理将地震响应峰值从波峰移至节理开口附近，从而扩大了高响应区。至关重要的是，早期低振幅振动的响应模式准确地描绘了最终的破坏区域。渐进式破坏机制经历了三个不同的阶段：(1)坡肩拉伸破裂，(2)岩桥贯通形成初级滑动面，(3)次级滑动面扩展。这项工作阐明了非持久接缝在改变地震需求和控制破坏方面的双重作用，为评估和减轻地震边坡危害提供了更精确的框架。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Engineering Geology 地学-地球科学综合

CiteScore

13.70

自引率

12.20%

发文量

327

审稿时长

5.6 months

期刊介绍： Engineering Geology, an international interdisciplinary journal, serves as a bridge between earth sciences and engineering, focusing on geological and geotechnical engineering. It welcomes studies with relevance to engineering, environmental concerns, and safety, catering to engineering geologists with backgrounds in geology or civil/mining engineering. Topics include applied geomorphology, structural geology, geophysics, geochemistry, environmental geology, hydrogeology, land use planning, natural hazards, remote sensing, soil and rock mechanics, and applied geotechnical engineering. The journal provides a platform for research at the intersection of geology and engineering disciplines.