Numerical Simulation on Seismic Response of the Filled Joint under High Amplitude Stress Waves Using Finite-Discrete Element Method (FDEM)
This paper numerically investigates the seismic response of the filled joint under high amplitude stress waves using the combined finite-discrete element method (FDEM). A thin layer of independent polygonal particles are used to simulate the joint fillings. Each particle is meshed using the Delaunay...
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MDPI AG
2016-12-01
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| Series: | Materials |
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| Online Access: | http://www.mdpi.com/1996-1944/10/1/13 |
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| author | Xiaolin Huang Qi Zhao Shengwen Qi Kaiwen Xia Giovanni Grasselli Xuguang Chen |
| author_facet | Xiaolin Huang Qi Zhao Shengwen Qi Kaiwen Xia Giovanni Grasselli Xuguang Chen |
| author_sort | Xiaolin Huang |
| collection | DOAJ |
| description | This paper numerically investigates the seismic response of the filled joint under high amplitude stress waves using the combined finite-discrete element method (FDEM). A thin layer of independent polygonal particles are used to simulate the joint fillings. Each particle is meshed using the Delaunay triangulation scheme and can be crushed when the load exceeds its strength. The propagation of the 1D longitude wave through a single filled joint is studied, considering the influences of the joint thickness and the characteristics of the incident wave, such as the amplitude and frequency. The results show that the filled particles under high amplitude stress waves mainly experience three deformation stages: (i) initial compaction stage; (ii) crushing stage; and (iii) crushing and compaction stage. In the initial compaction stage and crushing and compaction stage, compaction dominates the mechanical behavior of the joint, and the particle area distribution curve varies little. In these stages, the transmission coefficient increases with the increase of the amplitude, i.e., peak particle velocity (PPV), of the incident wave. On the other hand, in the crushing stage, particle crushing plays the dominant role. The particle size distribution curve changes abruptly with the PPV due to the fragments created by the crushing process. This process consumes part of wave energy and reduces the stiffness of the filled joint. The transmission coefficient decreases with increasing PPV in this stage because of the increased amount of energy consumed by crushing. Moreover, with the increase of the frequency of the incident wave, the transmission coefficient decreases and fewer particles can be crushed. Under the same incident wave, the transmission coefficient decreases when the filled thickness increases and the filled particles become more difficult to be crushed. |
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| format | Article |
| id | doaj.art-514624d3c2ae483faff4b36d596be8b1 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-04-12T09:24:34Z |
| publishDate | 2016-12-01 |
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| record_format | Article |
| series | Materials |
| spelling | doaj.art-514624d3c2ae483faff4b36d596be8b12022-12-22T03:38:31ZengMDPI AGMaterials1996-19442016-12-011011310.3390/ma10010013ma10010013Numerical Simulation on Seismic Response of the Filled Joint under High Amplitude Stress Waves Using Finite-Discrete Element Method (FDEM)Xiaolin Huang0Qi Zhao1Shengwen Qi2Kaiwen Xia3Giovanni Grasselli4Xuguang Chen5Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaDepartment of Civil Engineering, University of Toronto, Toronto, ON M5S 1A4, CanadaKey Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaDepartment of Civil Engineering, University of Toronto, Toronto, ON M5S 1A4, CanadaDepartment of Civil Engineering, University of Toronto, Toronto, ON M5S 1A4, CanadaCollege of Engineering, Ocean University of China, Qingdao 266100, ChinaThis paper numerically investigates the seismic response of the filled joint under high amplitude stress waves using the combined finite-discrete element method (FDEM). A thin layer of independent polygonal particles are used to simulate the joint fillings. Each particle is meshed using the Delaunay triangulation scheme and can be crushed when the load exceeds its strength. The propagation of the 1D longitude wave through a single filled joint is studied, considering the influences of the joint thickness and the characteristics of the incident wave, such as the amplitude and frequency. The results show that the filled particles under high amplitude stress waves mainly experience three deformation stages: (i) initial compaction stage; (ii) crushing stage; and (iii) crushing and compaction stage. In the initial compaction stage and crushing and compaction stage, compaction dominates the mechanical behavior of the joint, and the particle area distribution curve varies little. In these stages, the transmission coefficient increases with the increase of the amplitude, i.e., peak particle velocity (PPV), of the incident wave. On the other hand, in the crushing stage, particle crushing plays the dominant role. The particle size distribution curve changes abruptly with the PPV due to the fragments created by the crushing process. This process consumes part of wave energy and reduces the stiffness of the filled joint. The transmission coefficient decreases with increasing PPV in this stage because of the increased amount of energy consumed by crushing. Moreover, with the increase of the frequency of the incident wave, the transmission coefficient decreases and fewer particles can be crushed. Under the same incident wave, the transmission coefficient decreases when the filled thickness increases and the filled particles become more difficult to be crushed.http://www.mdpi.com/1996-1944/10/1/13high amplitude stress wavefilled jointamplitude attenuationparticle crushinggrain size reductionFDEM |
| spellingShingle | Xiaolin Huang Qi Zhao Shengwen Qi Kaiwen Xia Giovanni Grasselli Xuguang Chen Numerical Simulation on Seismic Response of the Filled Joint under High Amplitude Stress Waves Using Finite-Discrete Element Method (FDEM) Materials high amplitude stress wave filled joint amplitude attenuation particle crushing grain size reduction FDEM |
| title | Numerical Simulation on Seismic Response of the Filled Joint under High Amplitude Stress Waves Using Finite-Discrete Element Method (FDEM) |
| title_full | Numerical Simulation on Seismic Response of the Filled Joint under High Amplitude Stress Waves Using Finite-Discrete Element Method (FDEM) |
| title_fullStr | Numerical Simulation on Seismic Response of the Filled Joint under High Amplitude Stress Waves Using Finite-Discrete Element Method (FDEM) |
| title_full_unstemmed | Numerical Simulation on Seismic Response of the Filled Joint under High Amplitude Stress Waves Using Finite-Discrete Element Method (FDEM) |
| title_short | Numerical Simulation on Seismic Response of the Filled Joint under High Amplitude Stress Waves Using Finite-Discrete Element Method (FDEM) |
| title_sort | numerical simulation on seismic response of the filled joint under high amplitude stress waves using finite discrete element method fdem |
| topic | high amplitude stress wave filled joint amplitude attenuation particle crushing grain size reduction FDEM |
| url | http://www.mdpi.com/1996-1944/10/1/13 |
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