Effect of the acceleration component normal to the sliding surface on earthquake-induced landslide triggering

Yuan, Rui; Tang, Chaowei; Deng, Qing‐Hai

doi:10.1007/s10346-014-0486-9

Cited by 42 publications

(9 citation statements)

References 28 publications

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“…If these effects were included in our dynamic tests, it would become impossible to isolate the effects of variable wave‐phasing relationships on coseismic strain accumulation. While many recent studies examine the effects of real‐world seismographic records on coseismic landslide behavior [ Schulz and Wang , ; Wang and Sassa , ; Yuan et al ., ], the aim and approach of these studies is fundamentally different.…”

Section: Methodsmentioning

confidence: 99%

The effects of normal and shear stress wave phasing on coseismic landslide displacement

Brain

Rosser

Sutton

et al. 2015

J. Geophys. Res. Earth Surf.

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Predictive models used to assess the magnitude of coseismic landslide strain accumulation in response to earthquake ground shaking typically consider slope-parallel ground accelerations only and ignore both the influence of coseismic slope-normal ground accelerations and the phase relationship between dynamic slope-normal and slope-parallel accelerations. We present results of a laboratory study designed to assess the significance of the phase offset between slope-normal and slope-parallel cyclic stresses on the generation of coseismic landslide displacements. Using a dynamic back-pressured shearbox that is capable of simulating variably phased slope-normal and slope-parallel dynamic loads, we subjected sediment samples to a range of dynamic loading scenarios indicative of earthquake-induced ground shaking. We detail the variations in strain accumulation observed when slope-normal and slope-parallel stresses occur independently and simultaneously, both in and out of phase, using a range of dynamic stress amplitudes. Our results show that the instantaneous phasing of dynamic stresses is critical in determining the amount of coseismic landslide displacement, which may vary by up to an order of magnitude based solely on wave-phasing effects. Instantaneous strain rate is an exponential function of the distance normal to the Mohr Coulomb failure envelope in plots of shear stress against normal effective stress. This distance is strongly controlled by the phase offset between dynamic normal and shear stresses. Our results demonstrate that conditions considered by conventional coseismic slope stability models can either overestimate or underestimate earthquake-induced landslide displacement by up to an order of magnitude. This has important implications for accurate assessment of coseismic landslide hazard.

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Section: Methodsmentioning

confidence: 99%

The effects of normal and shear stress wave phasing on coseismic landslide displacement

Brain

Rosser

Sutton

et al. 2015

J. Geophys. Res. Earth Surf.

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show abstract

“…The occurrence of a landslide in an area is controlled by various conditioning factors (Yuan et al 2013;Yuan et al 2015;Yuan et al 2016;Hong et al 2016a). However, there is no general rule for selecting the appropriate landslide conditioning factors (Ayalew and Yamagishi 2005).…”

Section: Landslide Conditioning Factorsmentioning

confidence: 99%

A novel hybrid artificial intelligence approach based on the rotation forest ensemble and naïve Bayes tree classifiers for a landslide susceptibility assessment in Langao County, China

Chen

Shirzadi

Shahabi

et al. 2017

Geomatics, Natural Hazards and Risk

179

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The main objective of this study was to produce landslide susceptibility maps for Langao County, China, using a novel hybrid artificial intelligence method based on rotation forest ensembles (RFEs) and na€ ıve Bayes tree (NBT) classifiers labeled the RF-NBT model. The spatial database consisted of eighteen conditioning factors that were selected using the information gain ratio (IGR) method. The model was evaluated using quantitative statistical criteria, including the sensitivity, specificity, accuracy, root mean squared error (RMSE), and area under the receiver operating characteristic curve (AUC). Furthermore, the new model was compared with the NBT, functional tree (FT), logistic model tree (LMT) and reduced-error pruning tree (REPTree) soft computing benchmark models. The findings indicated that the RF-NBT model showed an increased prediction accuracy relative to the NBT model using both the training and validation datasets, and the RF-NBT model exhibited a greater capability for landslide susceptibility mapping. The new RF-NBT model also showed the most preferable results compared with the FT, LMT and REPTree models. Finally, an analysis of the landslide density (LD) using the RF-NBT model demonstrated that the very high susceptibility (VHS) class had the highest LD (3.552) among the landslide susceptibility maps. These results can be used for the planning and management of areas vulnerable to landslides in order to prevent damages caused by such natural disasters.

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“…For example, the Daguangbao avalanche in An County, Mianyang City was the largest one with a slide volume of 11.6×10 8 m 3 , where the slip surface was located in an interlamination disturbed belt overlain by a 400-m thick of rock stratum [3]. The Donghekou avalanche in Qingchuan County, Guangyuan City was also initiated within a thinbedded weak carbonaceous slate [4]. Much research effort has been directed to exploring the initiation and kinematic mechanisms of these rockslides; however, the effect of weak interlayer remains unclear.…”

Section: Introductionmentioning

confidence: 99%

Dynamic acceleration response of a rock slope with a horizontal weak interlayer in shaking table tests

Liu

Qiu

2021

PLoS ONE

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The weak interlayer in a rock slope often plays a significant role in seismic rockslides; however, the effect of weak interlayer on the seismic slope response and damage process is still not fully understood. This study presents a series of shaking test tests on two model slopes containing a horizontal weak interlayer with different thicknesses. A recorded Wenchuan earthquake ground motion was scaled to excite the slopes. Measurements from accelerometers embedded at different elevations of slope surface and slope interior were analyzed and compared. The effect of the weak interlayer thickness on the seismic response was highlighted by a comparative analysis of the two slopes in terms of topographic amplification, peak accelerations, and deformation characteristics as the input amplitude increased. It was found that the structure deterioration and nonlinear response of the slopes were manifested as a time lag of the horizontal accelerations in the upper slope relative to the lower slope and a reduction of resonant frequency and Fourier spectral ratio. Test results show that under horizontal acceleration, both slopes exhibited significant topographic amplification in the upper half, and the difference in amplification between slope face and slope interior was more pronounced in Slope B (with a thin weak interlayer) than in Slope A (with a thick weak interlayer). A four-phased dynamic response process of both slopes was observed. Similar deformation characteristics including development of strong response zone and macro-cracks, vertical settlement, horizontal extrusion and collapse in the upper half were observed in both slopes as the input amplitude increased; however, the deformations were more severe in Slope B than in Slope A, suggesting an energy isolation effect of the thick interlayer in Slope A.

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Effect of the acceleration component normal to the sliding surface on earthquake-induced landslide triggering

Cited by 42 publications

References 28 publications

The effects of normal and shear stress wave phasing on coseismic landslide displacement

The effects of normal and shear stress wave phasing on coseismic landslide displacement

A novel hybrid artificial intelligence approach based on the rotation forest ensemble and naïve Bayes tree classifiers for a landslide susceptibility assessment in Langao County, China

Dynamic acceleration response of a rock slope with a horizontal weak interlayer in shaking table tests

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