Dynamic Response and Dynamic Failure Mode of a Weak Intercalated Rock Slope Using a Shaking Table

Abstract

A large-scale shaking table test was performed to study the dynamic response of slopes parallel to geological bedding (bedding slopes) and slopes that cross-cut geological bedding (counter-bedding slopes). The test results show that the acceleration amplification coefficients increase with increasing elevation and, when the input earthquake amplitude is greater than 0.3 g, both bedding and counter-bedding slopes begin to show nonlinear dynamic response characteristics. With increasing elevation, the displacement of the bedding slope surface increases greatly. Conversely, the displacement of the counter-bedding slope surface increases first and then decreases; the slope develops a bulge at the relative elevation of 0.85. The displacement of the bedding slope surface is greater than that of the counter-bedding slope. The counter-bedding slope is more seismically stable compared with the bedding slope. Based on the Hilbert-Huang transform and marginal spectrum theories, the processes that develop dynamic damage of the bedding and counter-bedding slopes are identified. It is shown that the dynamic failure mode of the bedding slope is mainly represented by vertical tensile cracks at the rear of the slope, bedding slide of the strata along the weak intercalation, and rock collapse from the slope crest. However, the dynamic failure mode of the counter-bedding slope is mainly represented by staggered horizontal and vertical fissures, extrusion of the weak intercalation, and breakage at the slope crest.

Failure mode and dynamic response of a double-sided slope with high water content of soil

“…AFAs increase with the increase of relative elevation. Due to the differences of slope materials, wave types and excitation frequency, the magnitude of AFAs among the results by present study and those by Liu & Xu (2014), Fan et al (2016, Xu et al (2008) and Chen et al (2010) are different. For instance, the AFAs in the result of Fan et al (2016) vary slightly along the elevation of slope, which are smaller than those by present study, Liu & Xu (2014), Xu et al (2008) and Chen et al (2010).…”

“…Therefore, the model slope will have a larger dynamic response when frequency parameter increases from 0.29 to 1.71 which is gradually close to the natural frequency of model slope. Figure 9a shows the comparison between present studies and the results reported by Liu & Xu (2014), Fan et al (2016, Xu et al (2008) and Chen et al (2010), and the detailed test parameters are listed in Table 5. The variation of AFAs with relative elevation reported by present study are consistent with those by Liu & Xu (2014), Fan et al (2016, Xu et al (2008) and Chen et al (2010), i.e.…”

“…This problem attracted great attentions among researchers (e.g. Arango and Seed 1974;Yang et al 2002;Ling et al 2005;Lin and Wang 2006;Latha and Garaga 2010;Huang et al 2011;Huang et al 2012; Wang and Lin 2011;Liu et al 2013;Fan et al 2016). Arango and Seed (1974) investigated the seismic stability of clay slopes and found that strong shaking resulted in development of a distinct "yield acceleration" that marked initiation of permanent deformation in their embankments.…”

Earthquake‐Induced Chains of Geologic Hazards: Patterns, Mechanisms, and Impacts

“…Among others, Lin and Wang (2006), Liu et al (2013), and G. Fan, Zhang, et al (2016) performed shakingtable tests on rock slopes having different stiffnesses, strengths, and bedding orientations. They reported a positive correlation between the amplification of the seismic acceleration and the height of the model slopes, which can derive from the reduction of stiffness along height (Ambraseys, 2009;Dakoulas & Gazetas, 1986).…”

Dynamic Failure Mode and Dynamic Response of High Slope Using Shaking Table Test

“…is test system can reproduce earthquake excitation and collect test data automatically and accurately. erefore, the shaking table test is a direct method used to reveal structural dynamic response and failure modes; the approach has been widely used in seismic response research on various structures [18][19][20].…”