A three-dimensional large-deformation random finite-element study of landslide runout considering spatially varying soil

Chen, Xuejian; Li, Dianqing; Tang, Xiaosong; Liu, Yong

doi:10.1007/s10346-021-01699-1

Cited by 90 publications

(14 citation statements)

References 39 publications

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“…At the same time, we know that our study has some limitations and the response of the actual staggered isolated structure is very complex under earthquakes. There are many factors that should be considered, such as landslide deformation [31], failure characteristics of sandstone under different envelope pressures [32], the influence of seismic force on slope stability [33], the influence of seismic activity during geological mining [34], and the difference between hard rock and soft rock [35,36].…”

Section: Discussionmentioning

confidence: 99%

Study on the Response of Staggered Floor Isolated Structures in Mountainous Areas under Three-Dimensional Earthquakes

et al. 2022

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As coal mines are susceptible to safety accidents due to earthquakes, the requirements for structures in coal mining areas such as fire control centers and hospitals are higher, so base isolated structures, including staggered isolated structures, adapted to mountainous terrain are used in mining areas. The staggered floor isolated structure is a kind of isolated structure in mountainous areas which developed from the base-isolated structure. The theoretical research on staggered isolated structures is relatively few, and the theoretical research lags behind the practical application of engineering. In this paper, three staggered floor isolated structures with different heights of staggered floors are established. The responses of structures under one-dimensional, two-dimensional, and three-dimensional earthquakes are analyzed by the finite element dynamic time-history analysis method. The structural torsion, interstory shear force, maximum axial force, and floor displacement of the structure are compared. Due to the asymmetric characteristics of the staggered floor isolated structure, the center of stiffness of the staggered floor isolated structure deviates from the center of mass, which produces not only horizontal vibration but also obvious torsional vibration. The input of earthquakes in different dimensions also makes a difference in the response of the structure. The location between the upper isolated layer and the first floor above the upper isolated layer is a weak point of the structure. The results obtained in this study are distinguished from traditional basic isolated structures, which supplements the theoretical research of the staggered isolated structure.

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Section: Discussionmentioning

confidence: 99%

Study on the Response of Staggered Floor Isolated Structures in Mountainous Areas under Three-Dimensional Earthquakes

et al. 2022

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“…The finite element method (FEM) is widely used in rigid block landslides which tend to be treated as dynamic grids or moving boundary conditions, and the entire computational domain is regarded as a water‐air two‐phase fluid space 7,8,9 . When modeling deformable landslides, purely meshless methods or coupled Eulerian–Lagrangian methods have been commonly adopted 10,11,12 . Some scholars proposed to generalize the deformable landslide as a non‐Newtonian fluid, which contributes to simplifying the mechanical mechanism of landslides and facilitating coupling calculations 13,14 .…”

Section: Introductionmentioning

confidence: 99%

An optimized DEM‐SPH model for surge waves induced by riverside landslides

Li,

Liu,

Yang

et al. 2023

Num Anal Meth Geomechanics

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Riverside landslides can induce surge waves during the process of entering water. The landslide‐induced surge wave is often regarded as a significant secondary disaster, as its impact region is likely to be even more remarkable than the landslide itself. Due to the large deformation of the soil landslide and water body during the evolution of surge waves, commonly adopted multi‐phase flow models and mesh‐based methods coupled with discrete element models have some limitations, such as weak accuracy, and simulation distortion with immature coupling algorithms. As a result, the pure meshless method of smoothed particle hydrodynamics (SPH) coupling discrete element methods (DEM) become promising. Modified from the traditional empirical formulae‐based coupling algorithm, this study proposes a semi‐resolved algorithm that effectively eliminates the particle distortion at the fluid‐solid coupling interface. The proposed model demonstrates its superiority through a comparison of the pressure and porosity near the coupling interface. Furthermore, the optimized DEM‐SPH model is applied to simulate landslide‐induced surge waves, and the simulation results have also validated the accuracy of the model. This model is capable of accurately simulating the entire propagation process from landslide entry into water to the wave reaching the opposite shore, and therefore provides an effective tool for the prediction and mitigation of wave hazards caused by landslides.

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“…However, the soil in most of these analyses is treated as an idealized material, with homogeneous or linear increases in shear strength. In nature, the inherent properties of soil deposits generally vary spatially [10][11][12][13][14][15][16][17][18]. It has been widely recognized that such spatial variability in soil parameters can cause the mechanical behaviors of offshore structures to deviate from the results of deterministic analyses.…”

Section: Introductionmentioning

confidence: 99%

Uplift Behavior of Pipelines Buried at Various Depths in Spatially Varying Clayey Seabed

et al. 2022

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The behavior of buried offshore pipelines subjected to upheaval buckling has attracted much attention in recent years. Numerous researchers have made great efforts to investigate the influence of different soil cover depth ratios, soil strengths and pipe-soil interfaces on failure mechanisms and bearing capacities during pipeline uplift. However, attention to soil spatial variability has been relatively limited. To address this gap, a random small-strain finite element analysis has been conducted and reported in this paper to evaluate the influence of the random distribution of soil strength on pipe uplift response. The validity of the numerical model was verified by comparison with the results presented in the previous literature. The spatial variation of soil strength was simulated by a random field. The effect of soil variability on the failure mechanism was determined by comparing the displacement contours of each random realization. Probabilistic analyses were performed on the random uplift capacity obtained by a series of Monte Carlo simulations, and the relationship between the failure probability and the safety factor was also determined. The findings of the present work might serve as a reference for the safety designs of pipelines.

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A three-dimensional large-deformation random finite-element study of landslide runout considering spatially varying soil

Cited by 90 publications

References 39 publications

Study on the Response of Staggered Floor Isolated Structures in Mountainous Areas under Three-Dimensional Earthquakes

Study on the Response of Staggered Floor Isolated Structures in Mountainous Areas under Three-Dimensional Earthquakes

An optimized DEM‐SPH model for surge waves induced by riverside landslides

Uplift Behavior of Pipelines Buried at Various Depths in Spatially Varying Clayey Seabed

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