Numerical prediction of liquefied ground characteristics from back-analysis of lateral spreading centrifuge experiments

Montassar, Sami; Buhan, Patrick de

doi:10.1016/j.compgeo.2013.01.010

Cited by 19 publications

(6 citation statements)

References 33 publications

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“…Kamai and Boulanger [35] simulated a centrifuge test and analyzed dissipation pattern, lateral spreading, and shear strain localization of the model to verify the proposed numerical modeling approach. Montassar and De Buhan [36] developed an identification procedure to evaluate the undrained shear strength and the Bingham viscosity coefficient of the viscoplastic Bingham media simulating liquefied soil of lateral spreading in two centrifuge tests. Howell et al [37] conducted numerical simulation on centrifuge tests to predict the site response and lateral spreading and verified the improvement by prefabricated vertical drains.…”

Section: Numerical Simulations To Lateral Spreadingmentioning

confidence: 99%

A Hybrid Approach Calculating Lateral Spreading Induced by Seismic Liquefaction

Yang

Liu

Wang

2020

Shock and Vibration

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Liquefaction-induced lateral spreading has caused severe damages to the infrastructures. To predict the liquefaction-induced lateral spreading, a hybrid approach was proposed based on the Newmark sliding-block model. One-dimensional effective stress analysis based on the borehole investigation of the site was conducted to obtain the triggering time of liquefaction and acceleration time history. Shear wave velocity of the liquefiable soil was used to estimate the residual shear strength of liquefiable soil. The limit equilibrium analysis was conducted to determine the yield acceleration corresponding with the residual shear strength of liquefied soil. The liquefaction-induced lateral spreading was calculated based on the Newmark sliding-block model. A case study based on Wildlife Site Array during the 1987 Superstition Hills earthquake was conducted to evaluate the performance of the hybrid approach. The results showed that the hybrid approach was capable of predicting liquefaction-induced lateral spreading and the calculated lateral spreading was 1.5 times the observed displacement in terms of Wildlife Site Array. Numerical simulations with two other constitutive models of liquefiable sand were conducted in terms of effective stress analyses to reproduce the change of lateral spreading and excess pore water ratio over the dynamic time of Wildlife Site Array. Results of numerical simulations indicated that the lateral spreading varied with the triggering time of liquefaction when different constitutive models were used. The simulations using PM4sand and UBC3D-PLM constitutive models predicted 5.2 times and 4 times the observed lateral spreading, respectively. To obtain the site response, the motions recorded at and below the ground surface were analyzed using the Hilbert–Huang transform. The low-frequency content of the motion below the ground surface was amplified at the ground surface, and the liquefaction effect resulted in a shift of the frequency content. By comparing the response spectra of the entire ground surface motion and the ground surface motion from the beginning to the triggering time of liquefaction, the liquefaction effect at the site was confirmed.

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Section: Numerical Simulations To Lateral Spreadingmentioning

confidence: 99%

A Hybrid Approach Calculating Lateral Spreading Induced by Seismic Liquefaction

Yang

Liu

Wang

2020

Shock and Vibration

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“…Zienkiewicz et al 23 . were at the forefront of numerical modeling of liquefaction, which was later continued by other researchers 24–28 . Such an analysis is a necessary component to shed light on the seismic performance of engineering structures.…”

Section: Introductionmentioning

confidence: 99%

Investigation of liquefaction‐induced lateral spreading of gently sloping grounds using a variable permeability model

Malekmakan

Shahir

Ayoubi

2021

Num Anal Meth Geomechanics

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Liquefaction‐induced lateral spreading takes place on gently sloping grounds due to the liquefaction of sand layers during an earthquake. This phenomenon had catastrophic effects in past events such as the 1964 Niigata, Japan earthquake. In this study, a recently proposed variable permeability function along with a critical state two‐surface plasticity model is employed in a fully‐coupled dynamic numerical model to simulate the lateral spreading. The variable permeability function is re‐calibrated such that the numerical model is able to simulate lateral spreading in a more realistic way compared to the experimental records. By means of six centrifuge experiments for verification, it is shown that the current numerical model is properly capable to capture the underlying physics of liquefaction‐induced lateral spreading. Using the calibrated model, a comprehensive parametric study is conducted and the results are used to develop a practical correlation to estimate the lateral displacement of a liquefied gently sloped ground.

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“…Huang et al [21] regarded liquefied sand as viscous fluid and analyzed the flow deformation of liquefied sand by using the VOF model. Monstassar and de Buhan [22] regarded liquefied sand as Bingham fluid with yield strength and developed a simplified one-dimensional numerical model to analyze the horizontal displacement of liquefied sand. Chen et al [23] studied the hydromechanical properties of liquefied sand, and the results showed that the behavior of postliquefaction fine sand under monotonic axial compression loading can be described as the combination fluid model of a power-law timeindependent fluid and a power-law time-dependent fluid.…”

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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Numerical prediction of liquefied ground characteristics from back-analysis of lateral spreading centrifuge experiments

Cited by 19 publications

References 33 publications

A Hybrid Approach Calculating Lateral Spreading Induced by Seismic Liquefaction

A Hybrid Approach Calculating Lateral Spreading Induced by Seismic Liquefaction

Investigation of liquefaction‐induced lateral spreading of gently sloping grounds using a variable permeability model

Research on Lateral Force of Pile Based on Liquefaction Site Effect

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