A Model Study on Dynamic Failure Modes of Discontinuous Rock Slopes

Shimizu, Yasuhiro; Aydan, Ömer; Ichikawa, Yasuaki; Kawamoto, T.

doi:10.1016/b978-0-08-035894-9.50028-7

Cited by 5 publications

(2 citation statements)

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“…Besides numerical simulation and field monitoring, shaking table tests are widely used in studying the seismic behaviors of rock slopes. The majority of test models simulated rock slopes with soil covering [26,27] or with discontinuous structures, such as jointed rock slopes [28][29][30], bedding rock slopes [31,32], counter-bedding rock slopes [10,33], and horizontally layered rock slopes [34,35]. These studies generally focused on the dynamic responses of acceleration/displacement and seismic failure, including the topographic/stratigraphic amplification of slope responses and the spatial development of discontinuities and their relations with the seismic forces controlling the failure modes of rock slopes.…”

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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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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“…Shimizu et al (1986) conducted three kinds of two-dimensional model tests to investigate the dynamic failure modes of rock slopes. The maximum amplification of about 300% was observed in accelerometers embedded at the top of a shaking table model of 600 mm long and 400 mm high.…”

Section: Introductionmentioning

confidence: 99%

Response of High-Strength Rock Slope to Seismic Waves in a Shaking Table Test

Liu

Li³

et al. 2013

Bulletin of the Seismological Society of America

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Studies on landslides by the 2008 Wenchuan earthquake showed that the topography is of great importance in amplifying the seismic shaking. The present study carried out experiments on rock slopes by means of a shaking table. The recorded Wenchuan earthquake waves are scaled to excite the model slopes. Measurements from accelerometers installed on free surface of the model slope simulating high-strength rocks are analyzed, with much effort on acceleration responses to both horizontal and vertical components of seismic shaking. It is found that the amplification factor of peak horizontal acceleration (PHA) is increasing with elevation of the model slope, though the upper and lower halves of the slope exhibit different increasing patterns. The amplification factor of peak vertical acceleration (PVA) exhibits a lying S-shaped changing trend with the elevation, indicating attenuations of PVAs at the toe and top of a slope. In addition, the XZ-direction shaking produces a horizontal and vertical response stronger than X-direction and Z-direction shaking alone. Both PHA and PVA increase with the excitation intensity. However, the corresponding amplification factors generally decrease, indicating the acceleration response of a slope weakens with the excitation intensity of shaking. Finally the statistic of ratio of PVA to PHA indicates that 85% of the slope height, especially the upper middle part, is likely subject to PVAs greater than or equal to 2=3 of PHA and 32% of the slope height to PVAs greater than or equal to PHA. This indicates the nonignorable role of PVA in responses of a slope to an earthquake and necessity of considering during design work.

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Investigation of effect of rock content on dynamic response and failure characteristics of soil–rock mixture slope using large-scale shaking table test

Zhao,

Xie,

et al. 2024

Engineering Failure Analysis

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A Model Study on Dynamic Failure Modes of Discontinuous Rock Slopes

Cited by 5 publications

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

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

Response of High-Strength Rock Slope to Seismic Waves in a Shaking Table Test

Investigation of effect of rock content on dynamic response and failure characteristics of soil–rock mixture slope using large-scale shaking table test

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