Coupled analysis of earthquake-induced permanent deformations at shallow and deep failure planes of slopes

Song, Jian; Wu, Kaili; Feng, Tian; Gao, Yufeng

doi:10.1016/j.enggeo.2020.105688

Cited by 12 publications

(3 citation statements)

References 27 publications

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“…In this infinite slope model, the reduction ratio of cohesion is 66.7%, and the fundamental period is 0.15 s. Figure 6 shows the displacement results of this infinite slope model. Seismic ground motions of simple sinusoidal motion with 0.6 s period and 2.5 m/s peak ground acceleration (PGA) 44 and earthquake recording from NGA/West2 are used here. Another slope model Case‐II is presented to show nonlinear coupled analysis might generate smaller results than rigid block analysis.…”

Section: Illustrated By Infinite Slope Modelsmentioning

confidence: 99%

A simplified nonlinear coupled Newmark displacement model with degrading yield acceleration for seismic slope stability analysis

Wang

Cui

et al. 2021

Num Anal Meth Geomechanics

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The use of Newmark permanent displacement to preliminarily evaluate the seismic performance of earth slopes has been well accepted in geotechnical community. Essentially, the seismic displacement would cause slope soil shear strength to reduce, thus causing the slope yield acceleration to degrade during the earthquake shaking. This phenomenon is known as degrading effect of yield acceleration, which has not been fully addressed in the literature. In this study, the degrading effect is investigated on the basis of various Newmark's displacement calculation frameworks for infinite slopes. Specifically, the flexible‐deformation‐recoverable soil columns as well as the nonlinear soil dynamic properties including the damping and shear modulus are taken into account to derive the coupled Newmark model. Detailed discussions are made to the possible influence of the degrading effect of yield acceleration in different schemes of Newmark displacement calculation frameworks. The parametric studies show that the seismic displacement calculated by the proposed method reaches peak value at small period ratio, and dramatically drops to zero when the period ratio increases. Furthermore, the possible influence of shear rate on soil shear strength is also discussed.

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Section: Illustrated By Infinite Slope Modelsmentioning

confidence: 99%

A simplified nonlinear coupled Newmark displacement model with degrading yield acceleration for seismic slope stability analysis

Wang

Cui

et al. 2021

Num Anal Meth Geomechanics

Self Cite

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“…Slope stability analysis is one of the important research topics in geotechnical engineering, its research methods include: limit equilibrium method, limit analysis method, numerical analysis method, etc. Among them, the limit equilibrium method is the most widely used, but it must rely on the experience of researchers to try to calculate a series of sliding surfaces to find the minimum safety factor and the corresponding critical sliding surface position [1,2]. As shown in Figure 1, the following figure shows the general treatment of roadbed slope and the arrangement of monitoring instruments.…”

Section: Introductionmentioning

confidence: 99%

Slope Stability Analysis Based on the Coupling of SA and Limit Equilibrium Mechanics

Yunhong,

Liang

2023

TECM

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The limit equilibrium strip method of slope has become mature, but because of the complexity of slope instability with many degrees of freedom and high nonlinear, a more three-dimensional and mature method is needed for slope problems. Based on the overall force balance and moment balance of slope, a unified model of three dimensional limit balance methods is established in this paper. Given different assumptions, the analytical expressions of each traditional model are obtained to avoid the problem of difficult boundary treatment when the original method is divided into bars and columns. The influence of the trailing edge point B and shear outlet A on the central axis of the sliding body, and the control arc radius variable t on the calculated value of the three-dimensional slope stability coefficient is discussed in detail. Then, based on the simulated annealing algorithm, the state generating function, state accepting function and temperature updating function are constructed, and the calculation method of optimizing the sliding surface search of the slope by using the simulated annealing algorithm is proposed, and the stability analysis of the slope of a hydropower reservoir dam area in Guangxi is carried out. The results show that the position of the sliding surface obtained by searching around the design value K = 1.10 is basically consistent with the actual one, which proves that the mechanical analysis method of coupling SA and limit equilibrium is convenient and efficient in the slope stability analysis.

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“…The earliest study on the effect of the seismic waves can be traced back to 1965, when Newmark proposed a method permitting a rapid estimate of the dams and embankments displacement in an earthquake [16]. After that, many studies focusing on the effects of seismic waves on the earthquake-triggered landslide dynamic response and failure behavior have been published [17][18][19][20][21]. For example, Chuang et al developed a nowcasting model for estimating the probability of landslides induced by earthquakes [22].…”

Section: Introductionmentioning

confidence: 99%

Effects of Three-Directional Seismic Wave on Dynamic Response and Failure Behavior of High-Steep Rock Slide

Liu

2021

Applied Sciences

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The landslide triggered by earthquakes can cause severe infrastructure losses or even fatalities. The high-steep rock slide is the most common type of landslide in the earthquake area. In an earthquake, the ground moves randomly in all directions, two horizontal directions (East-West (EW) direction, North-South (NS) direction) and one vertical direction (Up-Down (UD) direction). Even though extensive studies have been carried out on the earthquake-triggered landslide, the effects of each single seismic wave and the three-directional seismic waves are not considered. This study aims to evaluate the effects of different types of the seismic waves on the dynamic response and failure behavior of the high-steep rock slide. To investigate the effects of each single seismic wave and three-directional seismic wave, this study presents a numerical model with four types of seismic waves, e.g., East-West (EW) direction, North-South (NS) direction, Up-Down (UD) direction, and three-directional wave (EW_NS_UD). The numerical results revealed that the types of the seismic waves have significantly different effects on the dynamic process, failure behavior, run-out distance, velocity, and deposition of the high-steep rock slide.

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Coupled analysis of earthquake-induced permanent deformations at shallow and deep failure planes of slopes

Cited by 12 publications

References 27 publications

A simplified nonlinear coupled Newmark displacement model with degrading yield acceleration for seismic slope stability analysis

A simplified nonlinear coupled Newmark displacement model with degrading yield acceleration for seismic slope stability analysis

Slope Stability Analysis Based on the Coupling of SA and Limit Equilibrium Mechanics

Effects of Three-Directional Seismic Wave on Dynamic Response and Failure Behavior of High-Steep Rock Slide

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