Numerical simulation of ground flow caused by seismic liquefaction

Tamate, Satoshi; Towhata, Ikuo

doi:10.1016/s0267-7261(99)00022-6

Cited by 28 publications

(8 citation statements)

References 5 publications

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“…To predict the lateral displacement, various empirical (Valsamis et al 2010;Finn and Fujita 2002;Tamate and Towhata 1999) and numerical methods have been proposed. Youd (1992, 1995) have introduced an empirical model using a multi-linear regression model (MLR).…”

Section: Application Of Soft Computing For Lateral Spreadingmentioning

confidence: 99%

Seismic risk analysis using Bayesian belief networks

Tesfamariam

Liu

2013

Handbook of Seismic Risk Analysis and Management of Civil Infrastructure Systems

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Section: Application Of Soft Computing For Lateral Spreadingmentioning

confidence: 99%

Seismic risk analysis using Bayesian belief networks

Tesfamariam

Liu

2013

Handbook of Seismic Risk Analysis and Management of Civil Infrastructure Systems

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“…ereafter, Tamate and Towhata [18] regarded the liquefied soil as viscous fluid and analyzed the flow characteristic of liquefied sand by using the principle of minimum potential energy. Hadush et al [19] treated liquefied sand as Bingham fluid with yield strength, proposed and proved a numerical method based on fluid dynamics theory to predict deformation caused by liquefied soil, and used this method to reproduce liquefaction flow by the shaking table test.…”

Section: Introductionmentioning

confidence: 99%

Research on Lateral Force of Pile Based on Liquefaction Site Effect

Zuo

Enquan

2020

Shock and Vibration

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This paper presents a theoretical investigation on the lateral force of pile in liquefaction site. Regarded liquefied soil as fluid, the vector method can be used to analyze the liquefaction velocity field and solve the analytical solution of the dynamic field by making use of the principle of fluid mechanics. In addition, by solving the velocity field with vector symbol operation method, the analytical expression of the lateral force in the liquefied flow field is obtained, and the sensitivity of the parameters in the analytical expression is analyzed. The results show that the stress field of the pile contains both the pressure resistance caused by surface pressure and the friction resistance caused by shear stress, when the liquefied soil flows laterally. The lateral forces on the pile are mainly composed of inertial forces and damping forces and are related to density, fluid viscosity, pile radius, and vibration frequency. With the increase of density, fluid viscosity, and pile radius, the added mass and added damping increase gradually. In a certain range, added mass and added damping are sensitive to vibration frequency.

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“…Under seismic loading, the rapid increase in pore water pressure quickly decreases the shear strength of the unconsolidated sediment, possibly triggering large shear deformation. As flow failure of the ground during an earthquake may be caused by either the dynamic force due to the seismic acceleration or the static gravity force due to the topography of the ground (Tamate and Towhata 1999), flow deformation of post-liquefaction soil may continue under a gravitational load after seismic shaking ceases. In this case, the ground surface is prone to large-scale flow deformation regardless of whether it is flat or gently inclined.…”

Section: Introductionmentioning

confidence: 99%

Computational fluid dynamics modeling of post-liquefaction soil flow using the volume of fluid method

Huang

Mao

Zheng

et al. 2011

Bull Eng Geol Environ

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Flow deformation of post-liquefaction soil during an earthquake can cause serious damage to engineering structures. To overcome the limitations of conventional deformation analysis methods based on solid mechanics for extremely large systems, a computational fluid dynamics (CFD) method is proposed to numerically simulate the flow behavior of post-liquefaction soil. The liquefied soil is assumed to be a viscous fluid, and the volume of fluid (VOF) model is used for interface tracking in the numerical scheme. The results of a modeling test conducted on liquefaction-induced ground flow to verify the validity of the method showed good agreement, indicating the proposed method is capable of being used to reproduce the flow behavior of post-liquefaction soil.Keywords Soil liquefaction Á Flow failure Á Earthquake Á Computational fluid dynamics Á Volume of fluid method Résumé Les écoulements après liquéfaction de sols pendant un séisme peuvent causer de sérieux dommages aux ouvrages. Afin de surmonter les limitations des méth-odes conventionnelles d'analyse des déformations basées sur la mécanique des solides appliquée à des grands systèmes, une méthode numérique de dynamique des fluides (CFD) est proposée pour simuler numériquement l'écoulement après liquéfaction du sol. Le sol liquéfié est supposé être un fluide visqueux et le modèle du volume de fluide (VOF) est utilisé pour suivre les interfaces dans le schéma numérique. Les résultats d'un test de modélisation, destiné à vérifier la validité de la méthode et réalisé à partir d'un écoulement de terrain consécutif à un processus de liquéfaction, ont permis de conclure que la méthode proposée peut être utilisée pour reproduire le comportement du sol après liquéfaction.Mots clés Liquéfaction de sol Á Ecoulement Á Séisme Á Dynamique des fluides Á Modélisation Á Méthode du volume de fluide

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Numerical simulation of ground flow caused by seismic liquefaction

Cited by 28 publications

References 5 publications

Seismic risk analysis using Bayesian belief networks

Seismic risk analysis using Bayesian belief networks

Research on Lateral Force of Pile Based on Liquefaction Site Effect

Computational fluid dynamics modeling of post-liquefaction soil flow using the volume of fluid method

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