Evaluation of Flow-Ability on Fluidization Treated Soils Based on Flow Analysis by MPS Method

Inazumi, Shinya

doi:10.21660/2017.29.160216

Cited by 2 publications

(2 citation statements)

References 5 publications

(8 reference statements)

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“…In the Lagrange method, the calculation point moves as the object moves and deforms, so the convection term disappears from the governing equation. Equations ( 1) and (2) show the Navier-Stokes equations using the Euler method and the Lagrange method, respectively [26][27][28][29][30]:…”

Section: Particle-based Methods (Pbm) and Moving Particle Semi-implic...mentioning

confidence: 99%

“…Table 1 shows the physical characteristics of the water particles modeled by the MPSM, while Table 2 shows the physical characteristics of the sand particles modeled by the DEM. The MPSM parameters of water can be established by referring to the physical characteristics of water at a temperature of 20 • C [35], and the DEM parameters of the sand particles can be found by referring to the parameters used in previous studies [12,13,24,28,30,36,37]. Considering the time required for the calculation, the distance between the particles in the MPSM was set at 20 mm, and the particle size in the DEM was set at 20 mm.…”

Section: Mpsm-dem Coupled Caes Settingsmentioning

confidence: 99%

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Numerical Simulation of the Liquefaction Phenomenon by MPSM-DEM Coupled CAES

Nakao

Inazumi

Takahashi³

et al. 2022

Sustainability

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The mechanism of liquefaction and the factors that cause liquefaction behavior have previously been examined and evaluated, both analytically and experimentally; construction including liquefaction countermeasures is being implemented, based on these findings. This study presents a theoretical visualization of the mechanism of liquefaction generation and evaluates the behavior of particles in the ground. Specifically, an MPSM-DEM coupled CAE system (CAES) is employed to view the events beneath the ground, modeled three-dimensionally when an external acceleration is applied to simulate seismic waves and reveals the behavior below the surface. The numerical simulation of the liquefaction phenomenon, as represented by an MPSM-DEM coupled CAES system, clearly showed the mechanism of liquefaction generation and contributed to the design and accountability of more economical and sustainable liquefaction countermeasures, regardless of the field of specialization.

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Section: Particle-based Methods (Pbm) and Moving Particle Semi-implic...mentioning

confidence: 99%

Section: Mpsm-dem Coupled Caes Settingsmentioning

confidence: 99%

Numerical Simulation of the Liquefaction Phenomenon by MPSM-DEM Coupled CAES

Nakao

Inazumi

Takahashi³

et al. 2022

Sustainability

Self Cite

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Influence of Perforated Soils on Installation of New Piles

et al. 2022

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In recent years, there has been an increasing demand to replace ancient structures. The removal of such structures also involves the removal of the existing piles that supported the structures, and the backfilling of the pulling-out holes that formed during the removal. However, there are no standard guidelines for the backfilling of pulling-out holes. At present, therefore, each owner or contractor must determine the material and the construction method to use for backfilling. This results in a difference between the mechanical properties of the original soil and those of the soil that has been backfilled, namely, the soil on which a newly built structure will be constructed. In this study, it was assumed that a new pile would be installed on a perforated soil (that is, the soil left after removing the existing piles) where the mechanical properties differ between the original soil and the backfilled soil. The behavior of the new pile, when installed on the boundary of a soil between two types of mechanical properties, was evaluated by a three-dimensional linear elastic analysis. When the new pile was installed at the boundary between the two types of soil with different mechanical properties, most of the new pile was inclined to the soil side where the N value was relatively small. However, the inclination of the new pile was able to be suppressed by increasing the distance from the boundary between the two types of soil.

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Evaluation of Flow-Ability on Fluidization Treated Soils Based on Flow Analysis by MPS Method

Cited by 2 publications

References 5 publications

Numerical Simulation of the Liquefaction Phenomenon by MPSM-DEM Coupled CAES

Numerical Simulation of the Liquefaction Phenomenon by MPSM-DEM Coupled CAES

Influence of Perforated Soils on Installation of New Piles

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