Numerical Investigation of Rainfall-Induced Landslide in Mudstone Using Coupled Finite and Discrete Element Analysis
In this study, the role of water infiltration on a rainfall-induced landslide in mudstone is investigated. Finite element analysis (FEA) and discrete element analysis (DEA) were employed to explore the driving mechanism in the prefailure regime and the dynamic runout process in the postfailure regim...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2018/9192019 |
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| author | Ching Hung Chih-Hsuan Liu Chia-Ming Chang |
| author_facet | Ching Hung Chih-Hsuan Liu Chia-Ming Chang |
| author_sort | Ching Hung |
| collection | DOAJ |
| description | In this study, the role of water infiltration on a rainfall-induced landslide in mudstone is investigated. Finite element analysis (FEA) and discrete element analysis (DEA) were employed to explore the driving mechanism in the prefailure regime and the dynamic runout process in the postfailure regime, respectively. The driving mechanism was revealed in terms of the pore water pressures, saturation, and displacement of the sliding zone. To account for water infiltration associated with the dynamic runout process of the landsliding, the sliding friction coefficient in DEA was examined. Based on the results, satisfactory agreement between the numerical analysis and landslide behavior was realized. In prefailure regime, the onset of landslide initiation was found through assessment of rapid change of source displacement (RCSD). The estimated seepage force was about 0.5 N at landslide initiation. In postfailure regime, the results demonstrate that water infiltration and transition in steepness play significant roles in the behavior of the dynamic runout process. The landsliding exhibited a maximum speed of 4.41 m/s and decelerated as it reached a more gentle slope. Overall, the study indicated that the coupling of FEA and DEA can be used to investigate the role of water infiltration and provide useful insights. The approach can be further applied for studies on many other rainfall-induced geohazards to disclose the role of water infiltration with the prefailure and postfailure characteristics. |
| format | Article |
| id | doaj-art-265168ec57b14dfd87249de42698859e |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-265168ec57b14dfd87249de42698859e2025-02-03T01:03:42ZengWileyGeofluids1468-81151468-81232018-01-01201810.1155/2018/91920199192019Numerical Investigation of Rainfall-Induced Landslide in Mudstone Using Coupled Finite and Discrete Element AnalysisChing Hung0Chih-Hsuan Liu1Chia-Ming Chang2Department of Civil Engineering, National Cheng Kung University, No. 1 University Road, Tainan City, TaiwanDepartment of Civil Engineering, National Cheng Kung University, No. 1 University Road, Tainan City, TaiwanDepartment of Civil Engineering, National Cheng Kung University, No. 1 University Road, Tainan City, TaiwanIn this study, the role of water infiltration on a rainfall-induced landslide in mudstone is investigated. Finite element analysis (FEA) and discrete element analysis (DEA) were employed to explore the driving mechanism in the prefailure regime and the dynamic runout process in the postfailure regime, respectively. The driving mechanism was revealed in terms of the pore water pressures, saturation, and displacement of the sliding zone. To account for water infiltration associated with the dynamic runout process of the landsliding, the sliding friction coefficient in DEA was examined. Based on the results, satisfactory agreement between the numerical analysis and landslide behavior was realized. In prefailure regime, the onset of landslide initiation was found through assessment of rapid change of source displacement (RCSD). The estimated seepage force was about 0.5 N at landslide initiation. In postfailure regime, the results demonstrate that water infiltration and transition in steepness play significant roles in the behavior of the dynamic runout process. The landsliding exhibited a maximum speed of 4.41 m/s and decelerated as it reached a more gentle slope. Overall, the study indicated that the coupling of FEA and DEA can be used to investigate the role of water infiltration and provide useful insights. The approach can be further applied for studies on many other rainfall-induced geohazards to disclose the role of water infiltration with the prefailure and postfailure characteristics.http://dx.doi.org/10.1155/2018/9192019 |
| spellingShingle | Ching Hung Chih-Hsuan Liu Chia-Ming Chang Numerical Investigation of Rainfall-Induced Landslide in Mudstone Using Coupled Finite and Discrete Element Analysis Geofluids |
| title | Numerical Investigation of Rainfall-Induced Landslide in Mudstone Using Coupled Finite and Discrete Element Analysis |
| title_full | Numerical Investigation of Rainfall-Induced Landslide in Mudstone Using Coupled Finite and Discrete Element Analysis |
| title_fullStr | Numerical Investigation of Rainfall-Induced Landslide in Mudstone Using Coupled Finite and Discrete Element Analysis |
| title_full_unstemmed | Numerical Investigation of Rainfall-Induced Landslide in Mudstone Using Coupled Finite and Discrete Element Analysis |
| title_short | Numerical Investigation of Rainfall-Induced Landslide in Mudstone Using Coupled Finite and Discrete Element Analysis |
| title_sort | numerical investigation of rainfall induced landslide in mudstone using coupled finite and discrete element analysis |
| url | http://dx.doi.org/10.1155/2018/9192019 |
| work_keys_str_mv | AT chinghung numericalinvestigationofrainfallinducedlandslideinmudstoneusingcoupledfiniteanddiscreteelementanalysis AT chihhsuanliu numericalinvestigationofrainfallinducedlandslideinmudstoneusingcoupledfiniteanddiscreteelementanalysis AT chiamingchang numericalinvestigationofrainfallinducedlandslideinmudstoneusingcoupledfiniteanddiscreteelementanalysis |