Cumulative damage evolution of jointed slopes subject to continuous earthquakes: Influence of joint type on dynamic amplification effect and failure mode of slopes
This work investigates the dynamic response characteristics and cumulative damage evolution of jointed slopes under continuous earthquakes. Three jointed slope discrete-element models were created using a new fracture formation method to avoid particle overlap. The effects of joint types on dynamic...
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Published in | Computers and geotechnics Vol. 166; p. 106016 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
01.02.2024
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ISSN | 0266-352X 1873-7633 |
DOI | 10.1016/j.compgeo.2023.106016 |
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Abstract | This work investigates the dynamic response characteristics and cumulative damage evolution of jointed slopes under continuous earthquakes. Three jointed slope discrete-element models were created using a new fracture formation method to avoid particle overlap. The effects of joint types on dynamic amplification and failure mode are investigated. The results show that joints amplify the seismic response, with bedded jointed slopes exhibiting the highest magnification effect, followed by parallel jointed slopes and anti-dip jointed slopes. Cracks gradually increase under continuous earthquakes, with an increasing rate characterized by increase–decrease-increase–decrease. The failure scale of the bedded jointed slopes is the largest, followed by the parallel jointed slopes, and the anti-dip jointed slopes have the smallest failure scale. Seismic cumulative damage evolution encompasses stages of local damage (priming effect), expansion of local damage (accumulative effect), slip body formation, and instability (acceleration effect). Discontinuous joints affect the damage characteristics and instability modes of slopes by controlling fracture initiation and expansion. They have minimal impact on intrinsic frequency and frequency spectrum characteristics but significantly affect marginal spectrum characteristics. This work provides insights into the behaviour of jointed slopes under continuous earthquakes and the influence of joint types on their cumulative damage evolution process. |
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AbstractList | This work investigates the dynamic response characteristics and cumulative damage evolution of jointed slopes under continuous earthquakes. Three jointed slope discrete-element models were created using a new fracture formation method to avoid particle overlap. The effects of joint types on dynamic amplification and failure mode are investigated. The results show that joints amplify the seismic response, with bedded jointed slopes exhibiting the highest magnification effect, followed by parallel jointed slopes and anti-dip jointed slopes. Cracks gradually increase under continuous earthquakes, with an increasing rate characterized by increase–decrease-increase–decrease. The failure scale of the bedded jointed slopes is the largest, followed by the parallel jointed slopes, and the anti-dip jointed slopes have the smallest failure scale. Seismic cumulative damage evolution encompasses stages of local damage (priming effect), expansion of local damage (accumulative effect), slip body formation, and instability (acceleration effect). Discontinuous joints affect the damage characteristics and instability modes of slopes by controlling fracture initiation and expansion. They have minimal impact on intrinsic frequency and frequency spectrum characteristics but significantly affect marginal spectrum characteristics. This work provides insights into the behaviour of jointed slopes under continuous earthquakes and the influence of joint types on their cumulative damage evolution process. |
ArticleNumber | 106016 |
Author | Zhang, Shuai Song, Danqing Nie, Wen Liu, Chun |
Author_xml | – sequence: 1 givenname: Danqing surname: Song fullname: Song, Danqing email: dqsong@scut.edu.cn organization: School of Civil Engineering and Transportation, State Key Laboratory of Subtropical Building and Urban Science, South China University of Technology, Guangzhou, Guangdong 510640, China – sequence: 2 givenname: Shuai orcidid: 0000-0002-9649-4740 surname: Zhang fullname: Zhang, Shuai email: zzs9616@163.com organization: State Key Laboratory of Hydroscience and Engineering, Key Laboratory of Hydrosphere Sciences of the Ministry of Water Resources, and Department of Hydraulic Engineering, Tsinghua University, Beijing, China – sequence: 3 givenname: Chun surname: Liu fullname: Liu, Chun email: chunliu@nju.edu.cn organization: School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China – sequence: 4 givenname: Wen surname: Nie fullname: Nie, Wen email: wen.nie@vip.tom.com organization: State Key Laboratory of Safety and Health for Metal Mines, Maanshan 243000, China |
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Keywords | Seismic damage Discontinuous joint Rock slopes Instability modes PFC modelling Continuous earthquake excitation |
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Snippet | This work investigates the dynamic response characteristics and cumulative damage evolution of jointed slopes under continuous earthquakes. Three jointed slope... |
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StartPage | 106016 |
SubjectTerms | Continuous earthquake excitation Discontinuous joint Instability modes PFC modelling Rock slopes Seismic damage |
Title | Cumulative damage evolution of jointed slopes subject to continuous earthquakes: Influence of joint type on dynamic amplification effect and failure mode of slopes |
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