Numerical simulation for runout process of debris flow using depth-averaged material point method

Abe, Keita; Konagai, Kazuo

doi:10.1016/j.sandf.2016.08.011

Cited by 27 publications

(27 citation statements)

References 23 publications

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“…This can be caused due to numerical instability generated by the collision between block 1 and the others. [7] analyzed the behavior of wet and dry sand sliding through small-scale experimental tests. For this, an experimental box with a stainless-steel inclined flow channel and acrylic side walls was used.…”

Section: Resultsmentioning

confidence: 99%

“…The first model presents analytical solution. The second model reproduces a smallscale test presented by [7]. The last model is studied only comparatively among the numerical methods used.…”

Section: Numerical Modelsmentioning

confidence: 99%

“…The dry sand tested by [7] had a grain diameter of D50 of 0.34 mm. The sand was compacted at a relative density of 60% before being released into the stream.…”

Section: Case 2: Runout Process Of Sandmentioning

confidence: 99%

“…In the last years, the analysis of this type of problems has been approached using several methodologies and numerical modeling has been shown as one of the most effective tools to study the possible impacts caused by landslides. [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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MPM and ALE Simulations of Large Deformations Geotechnics Instability Problems

Alelvan

Toro-Rojas

Rossato

et al. 2020

DYNA

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Problems involving large deformations are the focus of numerical modeling researches in recent decades due to the challenge of finding a kinematic appropriate description of the continuum. In recent years, different formulations have been used to describe such problems as the Arbitrary Lagrangian Eulerian (ALE) method and the Material Point Method (MPM). These two methods allow to perform dynamic analyzes involving large deformations. In this way, this work aims to present a comparison of problems applied to Geotechnics involving large deformations and large displacements, using MPM and FEM associated with the ALE method. For this purpose, three problems are simulated: sliding of blocks on an inclined plane, runout process of sand and instability of a slope using the MPM and the FEM associated with the ALE method. In all cases a comparison of the results is presented, and the advantages and disadvantages of each method are discussed.

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Section: Resultsmentioning

confidence: 99%

Section: Numerical Modelsmentioning

confidence: 99%

“…The dry sand tested by [7] had a grain diameter of D50 of 0.34 mm. The sand was compacted at a relative density of 60% before being released into the stream.…”

Section: Case 2: Runout Process Of Sandmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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MPM and ALE Simulations of Large Deformations Geotechnics Instability Problems

Alelvan

Toro-Rojas

Rossato

et al. 2020

DYNA

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“…De acordo com Abe & Konagai (2016) e Riffel et al (2016), os luxos de detritos são movimentos rápidos, que concentram muita energia, nos quais detritos, blocos de rochas e restos vegetais se deslocam encosta abaixo e ao longo das linhas de drenagem em vales declivosos. Este tipo de movimento de massa geralmente está associado a uma sequência de escorregamentos quase simultâneos e consecutivos, que se juntam nas linhas de drenagem e provocam a erosão e o transporte de blocos de rochas ao longo dos leitos dos rios, mobilizando uma grande quantidade de material, com energia e poder destrutivo muito elevado.…”

Section: Introductionunclassified

Identificação e análise de áreas suscetíveis a fluxos de detritos na bacia hidrográfica do Rio Taquari-Antas, RS

et al. 2018

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O objetivo deste trabalhofoi identificar e analisar as áreas suscetíveis a fluxos de detritos na bacia do Rio Taquari-Antas, RS. O mapeamento das áreas suscetíveis foi realizado por meio de uma modelagem espacial com abordagem probabilística, envolvendo a análise morfométrica em locais com ocorrência de fluxos de detritos. Os locais foram inventariados por meio de imagens orbitais e expedições em campo, tendo sido mapeadas 193 cicatrizes. A maior parte das cicatrizes se refere ao evento ocorrido em janeiro de 2010, na sub-bacia do rio Forqueta. A partir de alguns testes, foram definidos três atributos morfométricos para a modelagem: (i) declividades filtradas pela média em janela 5x5; (ii) desnível altimétrico das rampas; (iii) desnível altimétrico dos morros. Estes atributos apresentaram uma tendência central bem definida, com baixa dispersão dos dados e uma baixa correlação entre si. As cicatrizes mapeadas de deslizamentos apresentam uma área total de 27,3 ha, a maioria delas com comprimento superior a 150 me largura na ordem de 10 m. O desnível altimétrico médio dos morros com ocorrência de movimentos de massa foi de 317 m, com declividade média de 39%. Os resultados indicam que as áreas suscetíveis a fluxos de detritos, 8.147 km² (30% da bacia), estão localizadas principalmente ao longo das linhas de escarpa erosiva, no contato entre a Serra Geral e as unidades geomorfológicas adjacentes. As linhas de escarpa erosiva estão localizadas nas vertentes dos vales dos rios das Antas, da Prata, São Marcos, Carreiro, Guaporé, Forqueta, Fão e Taquari. Em termos absolutos, os municípios com maior área suscetível são Bom Jesus, Jaquirana e Fontoura Xavier. Cerca de 40 municípios apresentam mais de 50% de suas áreas como suscetíveis a fluxos de detritos.

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Mud-Mark-Based Estimations of Mass-Wasting Processes Caused by the 2008 Iwate-Miyagi Nairiku Earthquake, Japan

Nomura,

Konagai,

Aftabur Rahman

et al. 2024

Progress in Landslide Research and Technology

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A 7.2 Magnitude (Moment Magnitude Mw: 6.8) earthquake occurred in the south inland of Iwate prefecture at 8:43 JST on June 14, 2008. Its epicenter was about 10 km northeast of Mt. Kurikoma, an active Nasu volcanic belt composite volcano whose lava flows from several eruption centers covering underlying crumbly secondary volcaniclastic deposits. Thus, the earthquake caused over 3000 mass-wasting events in its epicentral area, encompassing the Kurikoma Volcano’s flank on the hanging side of the seismic fault. Though these mass-wasting events were blamed as the primary cause of deaths in this earthquake, they left tremendous marks of soil deformations and tsunami (seiche) runups along a dam reservoir. The earthquake thus provided unique opportunities to gain insights into the dynamics of the mass-wasting events. The traces of two highly significant mass-wasting events, namely a debris flow that buried the Komano-Yu hot spring inn and a landslide mass of about 70 million m3 that induced a tsunami in the reservoir of Aratozawa dam, were highlighted in this paper. This paper reviews the findings from our observations in the referred papers. It also compares our findings with the other researchers’ inferences from different approaches.

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Numerical simulation for runout process of debris flow using depth-averaged material point method

Cited by 27 publications

References 23 publications

MPM and ALE Simulations of Large Deformations Geotechnics Instability Problems

MPM and ALE Simulations of Large Deformations Geotechnics Instability Problems

Identificação e análise de áreas suscetíveis a fluxos de detritos na bacia hidrográfica do Rio Taquari-Antas, RS

Mud-Mark-Based Estimations of Mass-Wasting Processes Caused by the 2008 Iwate-Miyagi Nairiku Earthquake, Japan

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