The mechanism of the 1941 Tsaoling landslide, Taiwan: insight from a 2D discrete element simulation

Tang, Chaowei; Hu, Jyr‐Ching; Lin, Min; Yuan, Rui; Cheng, Chao‐Lin

doi:10.1007/s12665-012-2190-1

Cited by 42 publications

(15 citation statements)

References 38 publications

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“…Note that the effectiveness of this kind of 2‐D numerical modelling of the landslide runout behavior has been extensively validated in the literature. [ 39–42 ]…”

Section: Deterministic Simulation Of the Jiweishan Landslide With Pfcmentioning

confidence: 99%

Probabilistic analysis of a discrete element modelling of the runout behavior of the Jiweishan landslide

Bing

Gong

Tang

et al. 2021

Num Anal Meth Geomechanics

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Landslide is one of the most destructive geohazards around the world. The destruction of a landslide can be estimated from its deformation and runout behaviors, which might be simulated with numerical software such as particle flow code (PFC). In the PFC simulation of the runout behavior of a landslide, the results are dependent upon the particle‐particle contact micro‐parameters (e.g., contact modulus and friction coefficient). The calibration of the micro‐parameters of the PFC models is a challenge and various uncertainties are involved. The uncertainty in the selection of the modelling parameters leads to uncertainty in the simulated runout behavior of the landslide. As a result, the damage potential of the landslide cannot be accurately evaluated. To this end, this paper presents a probabilistic analysis of the runout behavior of the Jiweishan landslide, in which the uncertainty in the selection of the particle‐particle contact micro‐parameters is explicitly considered. Here, the input micro‐parameters are modeled as discrete random variables, the possible realizations of which are obtained through an orthogonal analysis of the PFC simulation‐based uniaxial compression tests. The derived possible realizations of the micro‐parameters are then adopted as the inputs to the built model of the landslide. With the results obtained from these PFC simulations, the runout behaviors of the Jiweishan landslide, such as the runout distance and the deposit thickness, are studied probabilistically. The results provide an improved estimate of the landslide runout behavior and further aid in making an informed risk assessment of the landslide.

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“…Note that the effectiveness of this kind of 2‐D numerical modelling of the landslide runout behavior has been extensively validated in the literature. [ 39–42 ]…”

Section: Deterministic Simulation Of the Jiweishan Landslide With Pfcmentioning

confidence: 99%

Probabilistic analysis of a discrete element modelling of the runout behavior of the Jiweishan landslide

Bing

Gong

Tang

et al. 2021

Num Anal Meth Geomechanics

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“…The complex disintegration of the particulate system, such as rock and soil, can be well simulated by using the DEM 5 , 6 . Therefore, the method has been used to simulate triaxial tests 7 – 10 , direct shear test 11 , 12 and landslide 13 , 14 , etc.…”

Section: Introductionmentioning

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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“…Chen et al [24] realized the particle flow simulation of the fracture propagation of the single dangerous rock main control structure surface and the stability evaluation of the dangerous rock. Tang et al [25] used a two-dimensional discrete element simulation to study the formation mechanism of Caoling landslide in 1941.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Response of Seismic Dangerous Rock Based on PFC and Dynamics

Tian

Wang

Jin

et al. 2020

Advances in Civil Engineering

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Rock slope instability by earthquakes results in substantial economic and property losses. The calculation method of interlayer load and stability coefficient of horizontal complex layered rock slopes in high-intensity areas is established from material mechanics, fracture mechanics, and dynamics. The stability of horizontal layered dangerous rock is calculated after combining it with PFC simulation technology to verify the rationality of the calculation in the Wenchuan area of Sichuan Province. The dynamic response characteristics of dangerous rocks under different weathering degrees are also analyzed. The results show that both methods have an excellent early warning effect on earthquake dangerous rocks. Among the PGA amplification factors, Model 1 has a relatively uniform distribution, Model 2 has a zigzag distribution, Models 3 and 4 have a “U”-shaped distribution, and the most severe acceleration dynamic responses are 4-1 and 4-2 rock blocks. The dynamic acceleration response of mudstone is affected by the crack propagation process of the upper sandstone and exhibits a particular elevation amplification effect. The peak stress gradually decreases with the increase in weathering and elevation. The stress change of the inner chain No. 2 in the horizontal x and y directions is severe, and the stress response of the outer chain No. 1 in the vertical z-direction is severe. It recommends that earthquake disaster protection projects should pay attention to the impact of low-frequency (0–10 Hz) and high-frequency (250 Hz) earthquakes on slope stability.

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The mechanism of the 1941 Tsaoling landslide, Taiwan: insight from a 2D discrete element simulation

Cited by 42 publications

References 38 publications

Probabilistic analysis of a discrete element modelling of the runout behavior of the Jiweishan landslide

Probabilistic analysis of a discrete element modelling of the runout behavior of the Jiweishan landslide

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

Dynamic Response of Seismic Dangerous Rock Based on PFC and Dynamics

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