Numerical simulation of landslide-generated waves using a SPH-DEM coupling model

Bu, Shilong; Li, Daming; Chen, Shuo; Xiao, Chenzhi; Li, Yanqing

doi:10.1016/j.oceaneng.2022.111826

Cited by 16 publications

(4 citation statements)

References 40 publications

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“…-There is no possibility to analyze the post-failure behavior of the seismically triggered instabilities, which is crucial for further analysis of their effect on the accumulation and dam. Therefore, some new techniques need to be involved for this purpose, such as smooth-particle hydrodynamics, as it is successfully being used in the analysis of landslide-generated waves in existing accumulations (Bu et al, 2022). -Rather long computational time is required for numerical simulation (explicit dynamic analysis) due to the necessity of applying a small time increment.…”

Section: Discussionmentioning

confidence: 99%

Dynamic response of existing embankment dams in specific geotechnical and seismological conditions: contemporary framework for Serbian national guidelines

Kostić,

Rakić,

Bodić

et al. 2024

Front. Earth Sci.

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We suggest a new approach for evaluating the dynamic response of existing embankment dams as a guideline for national engineering regulations in Serbia. This novel concept is applied to the case study of the existing embankment dam “Zavoj” (Serbia), built at the place of the previously formed natural dam (due to large landslide activity), and exposed to Mw7.4 Vrančea earthquake and under double impact of Kresna earthquake (Mw6.8 and Mw7.1). Results of transient FEM and direct dynamical analysis of the three-dimensional FEM model of the “Zavoj” dam indicate that the existing dam is stable in dynamic conditions, while the surrounding terrain is either on the verge of stability or becomes unstable, depending on the assumed geotechnical conditions and a relevant earthquake analyzed. As a result, we construct a landslide hazard map in dynamic conditions and the dam damage map, which enables the identification of unstable, damaged, or weak parts of the dam, its immediate surroundings, and the accumulation zone in general. The results indicate that direct dynamical analysis is obligatory when two succeeding earthquakes occur and temporal evolution of displacements in the model is required. Additionally, the application of the remaining bearing capacity criterion indicates a much larger zone of potential instability compared to the extent of equivalent plastic strain and the location of the old sliding surface. By following the proposed guidelines, one secures the inclusion of all the relevant influential factors in the comprehensive dynamic analysis of existing embankment dams, leading eventually to reliable decisions on further design, (re)construction, and/or monitoring activities.

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Section: Discussionmentioning

confidence: 99%

Dynamic response of existing embankment dams in specific geotechnical and seismological conditions: contemporary framework for Serbian national guidelines

Kostić,

Rakić,

Bodić

et al. 2024

Front. Earth Sci.

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“…In addition, the SPH-DEM coupled approach is now commonly applied to the simulation of landslide tsunamis. Bu et al [34] proposed a coupled algorithm of SPH and DEM to deal with the interaction between landslides and water, and to simulate the surge waves generated by underwater landslides. Tan and Chen [35] proposed a block DEM-SPH model to investigate rigid landslides and their generated waves.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Modeling of Tsunami Waves Triggered by Submarine Landslides Based on the Smoothed Particle Hydrodynamics Method

Dai,

Li,

Lan

2023

JMSE

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Submarine landslides are a global geohazard that can displace huge volumes of loose submarine sediment, thereby triggering enormous tsunami waves and causing a serious threat to coastal cities. To investigate the generation of submarine landslide tsunamis, a three-dimensional numerical model based on the smoothed particle hydrodynamics (SPH) method is presented in this work. The model is first validated through the simulation of two underwater landslide model tests, and is then applied to simulate the movement of the Baiyun landslide in the South China Sea (SCS). The kinetics features of the submarine landslide, including the sliding velocity and runout distance, are obtained from the SPH simulation. The tsunami waves generated by the Baiyun landslide are predicted. In addition, sensitivity analyses are conducted to investigate the impact of landslide volume and water depth on the amplitude of the tsunami waves. The results indicate that the amplitude of tsunami waves triggered by submarine landslides increases with the landslide volume and decreases with the water depth of the landslide.

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“…The discrete element method (DEM) provides great convenience to model granular materials (such as sand, soil, rockfill, and debris flow) in geotechnical field (Bu et al 2022 ; Xu et al 2021 ; Xu and Dong 2021 ). However, the conventional DEM models use disks to replace the irregular particles (Gao et al 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Shape analysis of sand particles based on Fourier descriptors

Yan

Liu

Wei

et al. 2023

Environ Sci Pollut Res

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Particle shape greatly influences the mechanical behavior of geotechnical materials. For a specific material, for example, a sand particle, it remains an open question how to provide a comprehensive quantitative information about the particle shape. While Fourier descriptors, as a sequence of good shape descriptors, are well addressed in the literature, approaches mainly aim at pattern recognition in the field of computer vision. In this paper, Fourier descriptors are used to analyze the particle shape of geotechnical material. A total of 600 sand particles were collected from the Hutuo River, the main water resource of Shijiazhuang County, Hebei Province. Several shape descriptors, elongation, circularity, convexity, and roughness, are identified and further analyzed statistically. The Andrews plot of Fourier descriptors can be used to discriminate the sand samples. And it is convenient to use Fourier descriptors to reconstruct sand particles. A functional relationship between Fourier descriptors Dk and k, the frequency of the kth components is proved to exist. Moreover, the relationship between shape descriptors and Fourier descriptors is investigated in a correlation analysis. The elongation has a moderate correlation with Fourier descriptors of D1.

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Numerical simulation of landslide-generated waves using a SPH-DEM coupling model

Cited by 16 publications

References 40 publications

Dynamic response of existing embankment dams in specific geotechnical and seismological conditions: contemporary framework for Serbian national guidelines

Dynamic response of existing embankment dams in specific geotechnical and seismological conditions: contemporary framework for Serbian national guidelines

Three-Dimensional Modeling of Tsunami Waves Triggered by Submarine Landslides Based on the Smoothed Particle Hydrodynamics Method

Shape analysis of sand particles based on Fourier descriptors

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