Simulation of debris flow impacting bridge pier tests based on smooth particle hydromechanics method
In this paper, a three-dimensional numerical simulation model is established based on smooth particle hydrodynamics (SPH) method. In this model, the dynamic behavior of debris flow is described by using the Bingham fluid model, and the bridge pier is regarded as the terrain condition. The repulsive...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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SCIENCE PRESS , 16 DONGHUANGCHENGGEN NORTH ST, BEIJING, PEOPLES R CHINA, 100717
2021-05-01
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| Series: | Rock and Soil Mechanics |
| Subjects: | |
| Online Access: | http://rocksoilmech.whrsm.ac.cn/EN/10.16285/j.rsm.2020.6107 |
| _version_ | 1811313432675221504 |
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| author | LIANG Heng , LI Ji-lin LIU Fa-ming FU Gang LI Ming-qing HE Si-ming |
| author_facet | LIANG Heng , LI Ji-lin LIU Fa-ming FU Gang LI Ming-qing HE Si-ming |
| author_sort | LIANG Heng |
| collection | DOAJ |
| description | In this paper, a three-dimensional numerical simulation model is established based on smooth particle hydrodynamics (SPH) method. In this model, the dynamic behavior of debris flow is described by using the Bingham fluid model, and the bridge pier is regarded as the terrain condition. The repulsive force at the boundary is introduced to improve the boundary condition. Based on flume experiments, the accumulation processes of debris flow impacting the bridge pier with various viscosities and characteristics of the impact force-time curves are analyzed. The physical models are established, and the simulation of three-dimensional dynamic evolution processes of debris flow impacting the bridge pier with various rheological parameters and weights are realized. Moreover, the simulation results of the accumulation processes of debris flow with various rheological parameters and the impact force-time curves are analyzed. It is found that there are differences between the simulation results and the experimental results of the dynamic evolution processes of low-viscous debris flow impacting the bridge pier. From the view of fluid mechanics, the primary reason lies in the ignorance of the energy dissipation owing to lack of a description of Reynolds stresses caused by turbulence. Besides, the bridge pier safeguard procedures under the impact of debris flow with various viscosities are discussed. This work provides a theoretical support for further optimization of the three-dimensional numerical calculation model of debris flow impacting the bridge pier. |
| first_indexed | 2024-04-13T10:54:57Z |
| format | Article |
| id | doaj.art-bca4eec5117a408aa09bfd91f25ac59e |
| institution | Directory Open Access Journal |
| issn | 1000-7598 |
| language | English |
| last_indexed | 2024-04-13T10:54:57Z |
| publishDate | 2021-05-01 |
| publisher | SCIENCE PRESS , 16 DONGHUANGCHENGGEN NORTH ST, BEIJING, PEOPLES R CHINA, 100717 |
| record_format | Article |
| series | Rock and Soil Mechanics |
| spelling | doaj.art-bca4eec5117a408aa09bfd91f25ac59e2022-12-22T02:49:34ZengSCIENCE PRESS , 16 DONGHUANGCHENGGEN NORTH ST, BEIJING, PEOPLES R CHINA, 100717Rock and Soil Mechanics1000-75982021-05-014251473148410.16285/j.rsm.2020.6107Simulation of debris flow impacting bridge pier tests based on smooth particle hydromechanics methodLIANG Heng0, LI Ji-lin1LIU Fa-ming2FU Gang3LI Ming-qing4 HE Si-ming5 Key Laboratory of Mountain Hazards and Surface Process, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, Sichuan 610041, ChinaChina State Railway Group Co. Ltd., Beijing 100844, ChinaChina Railway Eryuan Engineering Group Co. Ltd, Chengdu, Sichuan 610031, China China Railway Eryuan Engineering Group Co. Ltd, Chengdu, Sichuan 610031, ChinaChina Railway Eryuan Engineering Group Co. Ltd, Chengdu, Sichuan 610031, ChinaKey Laboratory of Mountain Hazards and Surface Process, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, Sichuan 610041, ChinaIn this paper, a three-dimensional numerical simulation model is established based on smooth particle hydrodynamics (SPH) method. In this model, the dynamic behavior of debris flow is described by using the Bingham fluid model, and the bridge pier is regarded as the terrain condition. The repulsive force at the boundary is introduced to improve the boundary condition. Based on flume experiments, the accumulation processes of debris flow impacting the bridge pier with various viscosities and characteristics of the impact force-time curves are analyzed. The physical models are established, and the simulation of three-dimensional dynamic evolution processes of debris flow impacting the bridge pier with various rheological parameters and weights are realized. Moreover, the simulation results of the accumulation processes of debris flow with various rheological parameters and the impact force-time curves are analyzed. It is found that there are differences between the simulation results and the experimental results of the dynamic evolution processes of low-viscous debris flow impacting the bridge pier. From the view of fluid mechanics, the primary reason lies in the ignorance of the energy dissipation owing to lack of a description of Reynolds stresses caused by turbulence. Besides, the bridge pier safeguard procedures under the impact of debris flow with various viscosities are discussed. This work provides a theoretical support for further optimization of the three-dimensional numerical calculation model of debris flow impacting the bridge pier.http://rocksoilmech.whrsm.ac.cn/EN/10.16285/j.rsm.2020.6107sph methoddebris flowbridge pierimpactfluid-solid interaction |
| spellingShingle | LIANG Heng , LI Ji-lin LIU Fa-ming FU Gang LI Ming-qing HE Si-ming Simulation of debris flow impacting bridge pier tests based on smooth particle hydromechanics method Rock and Soil Mechanics sph method debris flow bridge pier impact fluid-solid interaction |
| title | Simulation of debris flow impacting bridge pier tests based on smooth particle hydromechanics method |
| title_full | Simulation of debris flow impacting bridge pier tests based on smooth particle hydromechanics method |
| title_fullStr | Simulation of debris flow impacting bridge pier tests based on smooth particle hydromechanics method |
| title_full_unstemmed | Simulation of debris flow impacting bridge pier tests based on smooth particle hydromechanics method |
| title_short | Simulation of debris flow impacting bridge pier tests based on smooth particle hydromechanics method |
| title_sort | simulation of debris flow impacting bridge pier tests based on smooth particle hydromechanics method |
| topic | sph method debris flow bridge pier impact fluid-solid interaction |
| url | http://rocksoilmech.whrsm.ac.cn/EN/10.16285/j.rsm.2020.6107 |
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