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A Discrete Element Analysis of the Sliding Friction Heat in High-Speed and Long-Runout Landslides
ZHU Yao1, ZHU Chengguang1, LIU Chun1,2, LIU Hui1, DENG Shang2
1.School of Earth Sciences and Engineering, Nanjing University, Nanjing 210046, China;2.Nanjing University High-tech Institute at Suzhou, Suzhou 215123, Jiangsu, China
摘要:
Earthquake is one of the main causes of high-speed and long-runout landslides. Generally, the heat generated in the sliding zone is significant in such devastating landslides. In this study, we establish a two dimensional slope model which includes 0.2 million elements to simulate the development of high speed and long-runout landslides using the discrete element software MatDEM. The model not only suggests that heat is produced by friction and fracturing, but also simulates the process of tension generation in cracks and the generation of a high heat zone near the sliding region. Besides, the heat field graph indicates a banded high heat belt that is related to the location of the thickest sliding body. The logarithms of the total calorific value and the highest value in the heat zone during the sliding process are linearly related to the logarithm of the landslide height.
关键词:  MatDEM  Discrete element method  Energy  Heat  Landslide
DOI:10.19743/j.cnki.0891-4176.202001005
分类号:
基金项目:This project was supported by the National Natural Science Foundation of China (41761134089, 41977218), Natural Science Foundation of Jiangsu Province (BK20170393), and Open Fund of National Laboratory for Marine Science and Technology (Qingdao) (QNLM2016ORP0110).
A Discrete Element Analysis of the Sliding Friction Heat in High-Speed and Long-Runout Landslides
ZHU Yao1, ZHU Chengguang1, LIU Chun1,2, LIU Hui1, DENG Shang2
1.School of Earth Sciences and Engineering, Nanjing University, Nanjing 210046, China;2.Nanjing University High-tech Institute at Suzhou, Suzhou 215123, Jiangsu, China
Abstract:
Earthquake is one of the main causes of high-speed and long-runout landslides. Generally, the heat generated in the sliding zone is significant in such devastating landslides. In this study, we establish a two dimensional slope model which includes 0.2 million elements to simulate the development of high speed and long-runout landslides using the discrete element software MatDEM. The model not only suggests that heat is produced by friction and fracturing, but also simulates the process of tension generation in cracks and the generation of a high heat zone near the sliding region. Besides, the heat field graph indicates a banded high heat belt that is related to the location of the thickest sliding body. The logarithms of the total calorific value and the highest value in the heat zone during the sliding process are linearly related to the logarithm of the landslide height.
Key words:  MatDEM  Discrete element method  Energy  Heat  Landslide