Experimental study on seismic response and progressive failure characteristics of bedding rock slopes

作     者：Mingdong Zang Guoxiang Yang Jinyu Dong Shengwen Qi Jianxian He Ning Liang Mingdong Zang;Guoxiang Yang;Jinyu Dong;Shengwen Qi;Jianxian He;Ning Liang

作者机构：School of Engineering and TechnologyChina University of Geosciences(Beijing)Beijing100083China Institute of GeosafetyChina University of Geosciences(Beijing)Beijing100083China Research Institute of Geotechnical Engineering and Hydraulic StructureNorth China University of Water Resources and Electric PowerZhengzhou450011China Key Laboratory of Shale Gas and GeoengineeringInstitute of Geology and GeophysicsChinese Academy of SciencesBeijing100029China Innovation Academy for Earth ScienceChinese Academy of SciencesBeijing100029China University of Chinese Academy of SciencesBeijing100049China Department of Geotechnical EngineeringSchool of Civil EngineeringSouthwest Jiaotong UniversityChengdu610031China 

出 版 物：《Journal of Rock Mechanics and Geotechnical Engineering》 (岩石力学与岩土工程学报（英文版）)

年 卷 期：2022年第14卷第5期

页      面：1394-1405页

核心收录：

学科分类：08[工学] 0818[工学-地质资源与地质工程] 080104[工学-工程力学] 0815[工学-水利工程] 0813[工学-建筑学] 0814[工学-土木工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：funded by the National Natural Science Foundation of China (Grant No. 41825018) the National Key Research and Development Plan of China (Grant No. 2019YFC1509704) the Second Tibetan Plateau Scientific Expedition and Research Program (STEP, Grant No. 2019QZKK0904) 

主　　题：Bedding rock slope Large-scale shaking table test Seismic response Progressive failure characteristics 

摘      要：Bedding rock slopes are common geological features in nature that are prone to failure under strong earthquakes. Their failures induce catastrophic landslides and form barrier lakes, posing severe threats to people’s lives and property. Based on the similarity criteria, a bedding rock slope model with a length of3 m, a width of 0.8 m, and a height of 1.6 m was constructed to facilitate large-scale shaking table *** results showed that with the increase of vibration time, the natural frequency of the model slope decreased, but the damping ratio increased. Damage to the rock mass structure altered the dynamic characteristics of the slope;therefore, amplification of the acceleration was found to be nonlinear and uneven. Furthermore, the acceleration was amplified nonlinearly with the increase of slope elevation along the slope surface and the vertical section, and the maximum acceleration amplification factor(AAF) occurred at the slope crest. Before visible deformation, the AAF increased with increasing shaking intensity;however, it decreased with increasing shaking intensity after obvious deformation. The slope was likely to slide along the bedding planes at a shallow depth below the slope surface. The upper part of the slope mainly experienced a tensile-shear effect, whereas the lower part suffered a compressive-shear force. The progressive failure process of the model slope can be divided into four stages, and the dislocated rock mass can be summarized into three zones. The testing data provide a good explanation of the dynamic behavior of the rock slope when subjected to an earthquake and may serve as a helpful reference in implementing antiseismic measures for earthquake-induced landslides.