Importance of viscous fluid characteristics in liquefaction induced lateral spreading analysis

Hadush, S.; Yashima, Atsushi; Uzuoka, Ryosuke

doi:10.1016/s0266-352x(00)00015-x

Cited by 55 publications

(29 citation statements)

References 9 publications

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“…However, Bingham flow, as one type of non-Newtonian fluid flow, only occurs when the shear stress τ is larger than yield strength τ y . A research supports that the relationship between shear strain rate and shear stress in highly deformed soil materials is in good agreement with the Bingham flow model (Hadush et al 2000). Therefore, the Bingham flow model is adopted as the constitutive model in this paper to describe the fluidization characteristics of flow-like landslides.…”

Section: Constitutive Modelsupporting

confidence: 63%

Run-out analysis of flow-like landslides triggered by the Ms 8.0 2008 Wenchuan earthquake using smoothed particle hydrodynamics

et al. 2011

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Run-out analysis of flow-like landslides triggered by the Ms 8.0 2008 Wenchuan earthquake using smoothed particle hydrodynamics Abstract Flow-like landslides have caused significant damage and casualties worldwide. However, studying such phenomena with traditional simulation methods is made difficult by their complex fluidization characteristics. In this paper, we use smoothedparticle hydrodynamics (SPH) for the run-out analysis of flowlike landslides. Compared with conventional methods, the proposed SPH modeling technique is the combination of a Bingham flow model and Navier-Stokes equations in the framework of computational fluid dynamics. At first, two benchmark problems of dam break and granular flow are simulated and verified to evaluate the accuracy of the SPH model. Then, run-out analyses are performed for flow-like landslides triggered by the Ms 8.0 Wenchuan earthquake that occurred on 12 May 2008 in Sichuan Province, China. Run-out analyses of the Tangjiashan, Wangjiayan, and Donghekou landslides are conducted by the application of SPH models to real flow-like landslides. All simulations show good agreement with characteristics of flowlike landslides observed in the field. We have found that numerical modeling can capture the fundamental dynamic behavior of these flow-like landslides and produce preliminary results for hazard assessment and site selection for reconstruction in earthquake-prone areas.

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Section: Constitutive Modelsupporting

confidence: 63%

Run-out analysis of flow-like landslides triggered by the Ms 8.0 2008 Wenchuan earthquake using smoothed particle hydrodynamics

et al. 2011

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“…For example, Uzuoka (3) and Hadush et al (4), (5) treated liquefied soil undergoing ground flow as a Bingham fluid and developed numerical methods based on fluid dynamics. Using results from shaking table tests (6), (7) , they showed that the methods were capable of reproducing the time histories of displacement and velocity of the liquefaction induced flow.…”

Section: Introductionmentioning

confidence: 99%

“…Using results from shaking table tests (6), (7) , they showed that the methods were capable of reproducing the time histories of displacement and velocity of the liquefaction induced flow. Uzuoka (3) used a volume of fluid (VOF) method and Hadush et al (4), (5) used a constrained interpolated profile (CIP) method (8), (9) . The limit of the methods based on fluid dynamics is that the history characteristic of geomaterials cannot be taken into consideration because of the numerical scheme is based on Eulerian scheme.…”

Section: Introductionmentioning

confidence: 99%

Large Deformation Analysis in Geomechanics Using CIP Method

Sawada

Moriguchi

Yashima

et al. 2004

JSME Int. J., Ser. B

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A numerical method is developed for prediction of large deformations associated with a geomaterial flow. The geomaterial is modeled as a viscous fluid, where a Bingham type constitutive model is proposed based on Mohr-Coulomb's failure criterion and the equivalent Newtonian viscosity is derived from the cohesion and friction angle. These two parameters are very important factors for the behavior of geomaterials. In solving Navier-Stokes's equations, a constrained interpolated profile (CIP) scheme is utilized. The numerical method developed in this paper is used to simulate a 2-dimensional gravitational flow in order to check the performance of the constitutive model. The method is also applied to two real slope failures. One is due to heavy rain and the other due to earthquake. In the analysis of the slope failure due to earthquake, simulated velocity of ground flow, displacement and elapsed time are compared with observed results. In the case of the analysis of the slope failure due to heavy rain, a previous study about the slope failure using finite element method (FEM) is firstly introduced. The method used in the previous study, however, could not describe the subsequent ground flow after the initiation of slope failure. Therefore, the method developed in this paper is applied to simulate the ground flow.

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“…Intensive efforts have been made by many researchers to extend the method to solve problems involving fluid flows and even solid mechanics. SPH has also been applied to model the propagation of catastrophic landslides (Hadush et al 2000). SPH method is suitable for stimulating a class of flow-like landslides of extremely large movements, because it is a meshfree particle method without the limitation of mesh distortion in carrying out the flow issue.…”

Section: Basic Concepts Of Sphmentioning

confidence: 99%

Three-dimensional run-out analysis and prediction of flow-like landslides using smoothed particle hydrodynamics

Liu

2014

Environ Earth Sci

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Many landslides can often be characterized as a sort of landslides which move rapidly like flowing fluid and thus have a long run-out. They usually cause large damage and casualties especially when they are trigged by an earthquake or heavy rain. Numerical simulations of flowlike landslides are difficult due to the existence of free surface and large flow deformations. In this work, the smoothed particle hydrodynamics (SPH) method is applied to model two-and three-dimensional flow-like landslides for the run-out analysis. This is because SPH method is a meshfree, Lagrangian particle method, and is believed to be superior to conventional numerical methods in treating free surfaces, moving interfaces, and large deformations; hence, it is ideal in describing the complex fluidization characteristics in flow-like landslides. In this paper, a Bingham flow model and Navier-Stokes equations are incorporated into the SPH frame work, in which fluids are discretized by flow particles, and 3D terrain topography from GIS is represented by surface (or solid wall) particles.An improved SPH method is first applied to simulate the whole run-out processes of three flow-like landslides, which were triggered by Wenchuan earthquake that occurred in China in 2008. The effectiveness of the improved SPH method in modeling flow-like landslides is demonstrated by the good agreement of the 3D profile simulation results obtained from the present SPH simulation with field observation and results from other open sources. The SPH method is then used to predict the runout area of Jinpingzi landslide.

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Importance of viscous fluid characteristics in liquefaction induced lateral spreading analysis

Cited by 55 publications

References 9 publications

Run-out analysis of flow-like landslides triggered by the Ms 8.0 2008 Wenchuan earthquake using smoothed particle hydrodynamics

Run-out analysis of flow-like landslides triggered by the Ms 8.0 2008 Wenchuan earthquake using smoothed particle hydrodynamics

Large Deformation Analysis in Geomechanics Using CIP Method

Three-dimensional run-out analysis and prediction of flow-like landslides using smoothed particle hydrodynamics

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