MPS-Cae Simulation on Dynamic Interaction Between Steel Casing and Existing Pile When Pulling Out Existing Piles

Inazumi, Shinya; Kuwahara, Shuichi; Jotisankasa, Apiniti; Chaiprakaikeow, Susit

doi:10.21660/2020.70.9166

Cited by 14 publications

(11 citation statements)

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“…Moreover, when the ratio of the tangential and normal components of the contact force exceeds the friction coefficient, µ, the particles undergo slippage, as modeled by the slider model. The contact force in the tangential direction at that time is replaced by Equation (13).…”

Section: Discrete Element Methods (Dem)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%

“…Based on the above background, the mechanism of liquefaction generation is visualized theoretically in this study, using a coupled computer-aided engineering system (CAES), the moving particle semi-implicit method (MPSM), and the discrete element method (DEM) [12,13]. CAES is a general term for technology that includes using a computer to simulate and analyze prototypes created using computer-aided design (CAD), considering the site conditions.…”

Section: Introductionmentioning

confidence: 99%

“…By visualizing the liquefaction phenomenon, it is expected that the mechanism of liquefaction generation will be clearly shown and that this will contribute to the development and accountability of more efficient and economical liquefaction countermeasures. By utilizing CAES to recreate the phenomenon of liquefaction, it is possible to visualize the generating mechanism of liquefaction, which cannot normally be seen in the natural ground, and solve the complicated problems associated with its manifestation [12,13]. In addition, since design and evaluation can be performed while comparing and examining the models of various ground conditions, it is thought that the design quality can be improved at an early stage and that a more effective construction method can be designed.…”

Section: Introductionmentioning

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: Discrete Element Methods (Dem)mentioning

confidence: 99%

Section: Mpsm-dem Coupled Caes Settingsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Nakao

Inazumi

Takahashi³

et al. 2022

Sustainability

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“…The construction procedure for this method is shown in the following (see Fig. 7) Inazumi et al 2020bInazumi et al , 2020c):…”

mentioning

confidence: 99%

Evaluation of effect of insertion of casing by rotation on existing piles

Inazumi

Tanaka²,

Komaki

et al. 2021

Geotechnical Research

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Various issues have been encountered in the removal work of existing piles, such as existing piles being left in the ground, the subsidence of the surrounding ground, and the deterioration of the ground environment when reusing the site. However, there are no regulations for the filling material to be injected into the draw holes that form after the removal of existing piles or for the removal work itself. In this study, therefore, for an evaluation of the effect of the insertion of the casing by rotation on an existing pile in the removal work of existing piles, the effect of the stress loaded onto an existing pile when the casing is inserted into the ground using MPS-CAE and the mechanism of its occurrence are clarified. As a result, it is found that the inner diameter of the casing used for the diameter of an existing pile, the value of the plastic viscosity of the drilling fluid, and the mechanism of the stress loaded onto an existing pile against the pile diameter can be evaluated such that the destruction of the existing piles can be avoided.

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Dynamic response of super-large-diameter steel casing under axial impact load

Wang

Lyu

et al. 2022

Ocean Engineering

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MPS-Cae Simulation on Dynamic Interaction Between Steel Casing and Existing Pile When Pulling Out Existing Piles

Cited by 14 publications

References 0 publications

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

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

Evaluation of effect of insertion of casing by rotation on existing piles

Dynamic response of super-large-diameter steel casing under axial impact load

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