Experimental study on dynamic response and failure mode of bedding rock slope with cracks under earthquake

IF 3.7 2区工程技术 Q3 ENGINEERING, ENVIRONMENTAL

Bulletin of Engineering Geology and the Environment Pub Date : 2025-01-24 DOI:10.1007/s10064-025-04100-w

Po Cheng, Yong Liu, Jun Hu, Kun Fang, Yao Hu

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Abstract

Rock slopes with cracks may remain stable under static conditions, but large-scale landslides may occur when subjected to seismic excitations. However, the presence of cracks has been long overlooked in existing studies on the dynamic stability of rock slopes. Attempts are successfully made in the current work to conduct comparative shaking table tests on bedding rock slopes with and without cracks, where the dynamic responses and failure modes of both types of slopes are systematically investigated. The results indicate that the presence of cracks significantly influences the propagation and response of seismic waves in slopes. When the input seismic amplitude exceeds 0.4 g, both types of slopes exhibit nonlinear dynamic response characteristics. The evolution process of slope surface displacement can be categorized into three stages: elastic deformation stage, plastic deformation stage, and failure stage. The damping ratio and natural frequency of both model slopes respectively show gradually increasing and decreasing trends, thereby the relationship between seismic input motion and damage coefficient has been established. The presence of cracks obviously alters the failure mode of the model slope and significantly increases the landslide volume. The bedding rock slope without cracks exhibits a single-stage sliding trend, while the one with cracks presents a multi-stage sliding trend. The findings of this research might facilitate the stability assessment and seismic design of bedding rock slopes.

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来源期刊

Bulletin of Engineering Geology and the Environment 工程技术-地球科学综合

CiteScore

7.10

自引率

11.90%

发文量

445

审稿时长

4.1 months

期刊介绍： Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces: • the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations; • the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change; • the assessment of the mechanical and hydrological behaviour of soil and rock masses; • the prediction of changes to the above properties with time; • the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.