The influence of shear velocity on the frictional resistance of rock discontinuities

Crawford, A.M.; Curran, J.H.

doi:10.1016/0148-9062(81)90514-3

Cited by 87 publications

(17 citation statements)

References 7 publications

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“…In particular, seismically induced rock slides can be strongly constrained by the orientation of local discontinuities and topographical amplification of the ground motion (Crawford and Curran, 1981;Ashford et al, 1997;Harp and Jibson, 2002); the latter has been proven by the observed anomalous concentrations of earthquake-induced rock slides (Sepulveda et al, 2005a,b).…”

Section: Introductionmentioning

confidence: 96%

Earthquake triggering of landslides in highly jointed rock masses: Reconstruction of the 1783 Scilla rock avalanche (Italy)

Bozzano¹,

Lenti²,

Martino³

et al. 2011

Geomorphology

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Section: Introductionmentioning

confidence: 96%

Earthquake triggering of landslides in highly jointed rock masses: Reconstruction of the 1783 Scilla rock avalanche (Italy)

Bozzano¹,

Lenti²,

Martino³

et al. 2011

Geomorphology

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“…In particular, seismically-induced disrupted landslides can be strongly influenced by the orientation of local discontinuities and the topographic amplification of the ground motion (Crawford and Curran, 1981;Harp and Jibson, 2002;Moore et al, 2011;Lovati et al, 2011). The amplification effect has been confirmed by observations of anomalous concentrations of earthquake-induced rockslides (Sepulveda et al, 2005a, b).…”

Section: Introductionmentioning

confidence: 55%

The role of near-field interaction between seismic waves and slope on the triggering of a rockslide at Lorca (SE Spain)

Alfaro

Delgado²,

García-Tortosa³

et al. 2012

Nat. Hazards Earth Syst. Sci.

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Abstract. A ∼1000 m 3 rockslide occurred close to Lorca (SE Spain) during the main shock (M w = 5.1) of the May 2011 seismic sequence. The location of the rockslide, within 10 km of the earthquake epicenter and along the southern slope of a valley in which similar geological conditions occur on both slopes of the valley, suggests a significant near-field effect due to local seismic response. This could be related to the specific interaction between the topography and the obliquely propagating seismic waves.A dynamic stress strain numerical model was constructed using the FLAC 7.0 finite difference code to back analyze the Lorca rockslide event and relate its occurrence to both the local seismic amplification and the interaction between seismic waves and local topography. The results indicate that only for seismic waves with incidence angles in the range 0 • -50 • are the occurred slope instabilities expected. These results do not significantly change when varying the values for either stiffness or strength parameters within the range of the experimental data.

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“…With regard to shear behavior evaluation through laboratory investigation, the direct shear test and cyclic shear test have gained significant attention. Considering the spatial geometry and stress state of rock joints, direct shear tests [6,[16][17][18][19][20] and cyclic shear tests [7,8,[21][22][23][24][25] were conducted by different researchers from around the world. It should, however, be noted that the aforementioned shear test requires a costly shear test apparatus, and moreover, it involves a difficult, complex, and time-consuming procedure of sample collection and preparation.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Shear Strength of Rock Joints and Its Influence on Key Blocks

Wang

Xiu

2019

Geofluids

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Shear strength deterioration of rock joints and its induced instability of key blocks subjected to dynamic disturbance constitute the mechanism of many geological disasters such as rockburst, landslide, and rockfall. In this study, the influence of dynamic disturbance on rock joints was quantified in the form of stress, of which model was established by quasistatic method. The dynamic shear strength of rock joints was analyzed theoretically following the Coulomb-Navier criterion and further investigated experimentally by split Hopkinson pressure bar (SHPB) tests with impact velocities of 4.850 m/s, 8.722 m/s, 12.784 m/s, and 16.935 m/s. The effect of engineering disturbance on shear strength of rock joints was measured, and a degradation coefficient was used to describe it quantitatively. Considering the degradation of dynamic shear strength of rock joints and its influence on block stability, the method for determining key blocks under dynamic disturbance was given. Implementing this method into the program of Geotechnical Structure and Model Analysis-3D (GeoSMA-3D) developed by the authors’ team, the visualization of key blocks was achieved. From theoretical analysis and experimental investigation, it was figured out that the shear strength of rock joints is degraded under dynamic disturbance. The degradation of friction angle becomes more sensitive than that of cohesion. Additionally, numerical results show that the number of key blocks was increased with the increasing impact velocities.

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The influence of shear velocity on the frictional resistance of rock discontinuities

Cited by 87 publications

References 7 publications

Earthquake triggering of landslides in highly jointed rock masses: Reconstruction of the 1783 Scilla rock avalanche (Italy)

Earthquake triggering of landslides in highly jointed rock masses: Reconstruction of the 1783 Scilla rock avalanche (Italy)

The role of near-field interaction between seismic waves and slope on the triggering of a rockslide at Lorca (SE Spain)

Dynamic Shear Strength of Rock Joints and Its Influence on Key Blocks

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