Liquefaction induced lateral spread analysis using the CIP method

Hadush, S.; Yashima, Atsushi; Uzuoka, Ryosuke; Moriguchi, Shuji; Sawada, Kazuhide

doi:10.1016/s0266-352x(01)00016-7

Cited by 36 publications

(18 citation statements)

References 11 publications

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“…In previous studies (Hadush et al, 2001; Moriguchi et al, 2002), due to the large gradients in the sound speeds of different materials, the term related to the pressure was solved implicitly and the other terms were solved by explicit procedures.…”

Section: Constitutive Modelmentioning

confidence: 99%

Numerical Simulation of Flow Failure of Geomaterials Based on Fluid Dynamics

Moriguchi

Yashima

Sawada

et al. 2005

SOILS AND FOUNDATIONS

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A numerical method is developed for the prediction of large deformations associated with a geomaterial flow during the occurrences of such geo-disasters as landslides and slope failures. The geomaterial is modeled as a viscous fluid, where a Bingham type constitutive model is proposed based on Coulomb's failure criterion and the viscosity is derived from the cohesion and friction angle. Numerical experiments on a 2D gravitational flow of a geomaterial column show that the constitutive model performs well. For solving Navier-Stokes's equations, Constrained Interpolated Profile (CIP) scheme is utilized, which is able to efficiently treat solid, liquid and gas together and has been successfully applied to problems in fluid dynamics. To prevent numerical instabilities due to a large Bingham viscosity, an implicit calculation procedure is proposed to calculate the viscous forces in the CIP. The method is finally used to simulate an earthquake-induced landslide that took place on May 26th, 2003 in the Northern part of Miyagi Prefecture in Japan. Results from soil-slump tests on the samples from the landslide site are used for determining the parameters in the simulation. Good agreements between the calculated and the observed results are obtained.

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Section: Constitutive Modelmentioning

confidence: 99%

Numerical Simulation of Flow Failure of Geomaterials Based on Fluid Dynamics

Moriguchi

Yashima

Sawada

et al. 2005

SOILS AND FOUNDATIONS

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show abstract

“…Based on the experimental results, some numerical simulations were carried out to study the liquefaction flow characteristic. Hadush et al 7) used CIP (cubic interpolated pseudo-particles) methods, which is able to treat solid, liquid and gas together, to study the effects of lateral flow of liquefied sand using the Bingham fluid model, and results satisfactorily reproduced the time history of ground surface velocity and displacement even the depth distribution of displacement. Shimizu 6) used SPH (Smoothed Particle Hydro-dynamics) method, in which constitutive model is described as a combination of frictional elasto-plastic solid model and viscous fluid model, to simulate flow behavior around a pile, and results showed that the stick-slip behavior can be reproduced by the simple solid-fluid mixture model, which is also similar to Bingham fluid.…”

Section: Introductionmentioning

confidence: 99%

Experiments of Cylinder Drag through Density-Matching Particle-Fluid Mixture and SPH Simulation

Otake

Guo

Matsushima

2016

J. JSCE

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A series of cylinder drag experiments were conducted using the density-matching Poly-Styrene Beads particle-fluids mixture to study the flow characteristics of liquefied sands. PIV technique was used to visualize the velocity fields around the moving cylinder. SPH (Smoothed Particle Hydrodynamics) simulations were also conducted to compare with the experimental results. Experiments results show that the solid fraction of 0.555 is quite important in this particle fluid mixture because the drag force exerted on the cylinder increases sharply with the solid fraction if it is greater than this value. This value coincides with the random loose packing density of mono-disperse spheres. PIV analysis shows that the velocity fields are quite localized around the cylinder, and the localized zone is expanded more in the moving direction than in the perpendicular direction. On the other hand, it turned out that the SPH simulations with a simple viscous fluid model cannot reproduce the similar velocity field, which indicates this particle-fluid mixture cannot be regarded as viscous fluid.

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“…Uzuoka et al (1998) and Hadush et al (2000) introduced the concept of equivalent viscosity into a Bingham fluid to solve the problems of unsteady flow and large deformation. Hadush et al (2001) and Sawada et al (2004) employed the cubic interpolated pseudoparticle (CIP) method to study large deformation in liquefied soils and reproduce the dynamic behaviors of ground displacement and velocity variations in soil at different depths.…”

Section: Introductionmentioning

confidence: 99%

Flow analysis of liquefied soils based on smoothed particle hydrodynamics

et al. 2011

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To overcome the disadvantages of traditional flow analysis methods for liquefied soils that exhibit fluidization and large deformation characteristics, Smoothed particle hydrodynamics (SPH) is adopted in this study to analyze the flow processes of liquefied soils. Bingham model with the use of the Mohr-Coulomb yield criterion, the concepts of equivalent Newtonian viscosity, and the Verlet neighbor list method are introduced into the framework of SPH to build an algorithm for the analysis of flowing liquefied soils. This modeling involves a simulation of physical model test of flowing liquefied soils that can be compared with numerical results. In addition, a shaking table test is selected from the literature for SPH analysis to verify the validation of the SPH method and extend its applications. The SPH simulation can reproduce the flow processes of liquefied soils and constrain estimates of the horizontal displacement, vertical displacement, and velocity of soils after liquefaction. According to the dynamic behaviors of the materials involved, designs can be implemented to improve the seismic safety of structures.

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Liquefaction induced lateral spread analysis using the CIP method

Cited by 36 publications

References 11 publications

Numerical Simulation of Flow Failure of Geomaterials Based on Fluid Dynamics

Numerical Simulation of Flow Failure of Geomaterials Based on Fluid Dynamics

Experiments of Cylinder Drag through Density-Matching Particle-Fluid Mixture and SPH Simulation

Flow analysis of liquefied soils based on smoothed particle hydrodynamics

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