Some considerations on the use of numerical methods to simulate past landslides and possible new failures: the case of the recent Xinmo landslide (Sichuan, China)

Scaringi, Gianvito; Fan, Xiang; Liu, Fangzhou; Li, Chun; Ouyang, Chuying; Domènech, Guillem; Yang, Fan; Dai, Lanxin

doi:10.1007/s10346-018-0953-9

Cited by 173 publications

(47 citation statements)

References 77 publications

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“…Using a single parameter, a PD ‐dependent law can incorporate both the velocity‐dependent and normal stress‐dependent behaviors while tracking the evolution of the landslide movement through time. For instance, a PD ‐based reanalysis of the 2008 Daguangbao landslide (He et al (2019)) or the 2017 Xinmo landslide (Scaringi, Fan, et al, 2018) could suggest values increasing from 0 to many megawatts per square meter in a matter of seconds during runout, and then decreasing in the deposition phase.…”

Section: Resultsmentioning

confidence: 99%

An Empirical Power Density‐Based Friction Law and Its Implications for Coherent Landslide Mobility

Deng

Yan

Scaringi

et al. 2020

Geophysical Research Letters

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The evolution of the shear resistance at the base of a coherent landslide body can effectively control its dynamic behavior. High‐velocity rotary shear experiments have allowed scientists to explore stress‐strain conditions close to those found in large landslides and faults. These experiments have led to two alternative models being proposed, which describe the evolution of the shear resistance through friction laws that depend either on normal stress or on velocity. Here, we discuss an integrated approach, first proposed to study seismic fault behavior, that reconciles these two models under a single parameter—the power density—which we utilize for the first time to investigate landslide dynamics. Using thermodynamic and process‐based considerations, different soil and rock types can be related to different weakening mechanisms, which in turn can determine different landslide behaviors.

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Section: Resultsmentioning

confidence: 99%

An Empirical Power Density‐Based Friction Law and Its Implications for Coherent Landslide Mobility

Deng

Yan

Scaringi

et al. 2020

Geophysical Research Letters

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“…Based on an innovative GPU matrix computing of discrete element method, the software may handle millions of elements in one workstation. It has the advantages of high computational efficiency and powerful secondary development functions, and has been successfully applied in the investigation of landslides 32 , failure of sandstone 6 , tunnel issues 33 , etc. In the study, a three-dimensional discrete element simulator for triaxial tests was developed by using the secondary development functions of MatDEM.…”

Section: Numerical Simulations Of Triaxial Testsmentioning

confidence: 99%

A three-dimensional discrete element model of triaxial tests based on a new flexible membrane boundary

Yan

Liu

Zhang

et al. 2021

Sci Rep

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Based on a new elastic clump model, a flexible membrane is proposed for the discrete element numerical simulations of triaxial tests. Conversional triaxial tests of sandstone under the confining pressures of 2 MPa and 8 MPa were carried out, in order to validate the effectiveness of the proposed numerical simulation method. The numerical model is validated by comparing the numerical results with the test results. The deformation and failure process of numerical model is analyzed by stress–strain curves, micro fractures, displacement fields, stress fields and energy fields. The model shows an X-shape shear failure zone, of which the angle is very close to that of the test; the dip angle of most shear fractures is close to the angle of the internal friction; and there is a large amount of slipping frictional heat generated on the failure surface. During the loading process, the stress chain and stress concentration appear in the middle of the model, which lead to displacement zoning in the model. The failure of the model is associated with the growth of the micro tensile- and shear fractures. This study provides an effective tool for the macro–micro investigation of rock failure processes.

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“…The category of the discrete approach includes the distinct element method (DEM) and the discontinuous deformation analysis method (DDA). These methods were employed in several studies to analyse the post-failure stage of landslides [19][20][21][22]. Among the continuum approaches, the most common ones are the smoothed particle hydrodynamics method (SPH) [23][24][25][26] and the material point method (MPM) [27][28][29][30][31][32][33][34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Run-Out Simulation of a Landslide Triggered by an Increase in the Groundwater Level Using the Material Point Method

Troncone

Pugliese

Conte

2020

Water

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Deformation mechanisms of the slopes are commonly schematized in four different stages: pre-failure, failure, post-failure and eventual reactivation. Traditional numerical methods, such as the finite element method and the finite difference method, are commonly employed to analyse the slope response in the pre-failure and failure stages under the assumption of small deformations. On the other hand, these methods are generally unsuitable for simulating the post-failure behaviour due to the occurrence of large deformations that often characterize this stage. The material point method (MPM) is one of the available numerical techniques capable of overcoming this limitation. In this paper, MPM is employed to analyse the post-failure stage of a landslide that occurred at Cook Lake (Wyoming, USA) in 1997, after a long rainy period. Accuracy of the method is assessed by comparing the final geometry of the displaced material detected just after the event, to that provided by the numerical simulation. A satisfactory agreement is obtained between prediction and observation when an increase in the groundwater level due to rainfall is accounted for in the analysis.

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Some considerations on the use of numerical methods to simulate past landslides and possible new failures: the case of the recent Xinmo landslide (Sichuan, China)

Cited by 173 publications

References 77 publications

An Empirical Power Density‐Based Friction Law and Its Implications for Coherent Landslide Mobility

An Empirical Power Density‐Based Friction Law and Its Implications for Coherent Landslide Mobility

A three-dimensional discrete element model of triaxial tests based on a new flexible membrane boundary

Run-Out Simulation of a Landslide Triggered by an Increase in the Groundwater Level Using the Material Point Method

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