Influence of the State of Interfaces on the Character of Local Displacements in Fault-Block and Interfacial Media

Psakhie, S. G.; Ruzhich, V. V.; Shilko, Evgeny V.; Popov, Valentin L.; Dimaki, Andrey V.; Астафуров, С. В.; Лопатин, В. В.

doi:10.1134/1.2035374

Cited by 11 publications

(6 citation statements)

References 3 publications

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“…The plot uses the data of several investigations. [1][2][3][4][5][6][7][8][9][10][11] are presented in [65]. Lines-best fit of the data in the range L < 500 m and L > 500 m. b Shear stiffness of a fault.…”

Section: Localization Of Deformations and Hierarchy Of Faultsmentioning

confidence: 99%

“…Special attention in his works was paid to the possibility of altering the regime of blocky medium deformation to prevent powerful seismic impacts [1][2][3]. Starting with the application of the method of movable cellular automata [4] to the problems of deformation of contact areas between rock blocks, S. G. Psakhie and his colleagues conducted a series of experimental works, including investigations of the reaction of a natural fault to dynamic disturbances and watering [5][6][7]. Especially a big cycle of works should be noted that had been performed on the ice cover of the Lake of Baikal, which was used as a model to study the tectonic processes in the Earth's crust [8,9].…”

Section: Introductionmentioning

confidence: 99%

“…It means that a movement can be provoked at a fault that hasn't reached the ultimate state yet. Though the mechanics of the process seemed evident, it remained unclear whether the triggered movement would be a "quasi-viscous" one (in terms of V. V. Ruzhich with co-authors [7]) and no dynamic failure would occur. Let us cite Sh.…”

Section: Introductionmentioning

confidence: 99%

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Fault Sliding Modes—Governing, Evolution and Transformation

Kocharyan

Остапчук

Павлов

2020

Springer Tracts in Mechanical Engineering

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A brief summary of fundamental results obtained in the IDG RAS on the mechanics of sliding along faults and fractures is presented. Conditions of emergence of different sliding regimes, and regularities of their evolution were investigated in the laboratory, as well as in numerical and field experiments. All possible sliding regimes were realized in the laboratory, from creep to dynamic failure. Experiments on triggering the contact zone have demonstrated that even a weak external disturbance can cause failure of a “prepared” contact. It was experimentally proven that even small variations of the percentage of materials exhibiting velocity strengthening and velocity weakening in the fault principal slip zone may result in a significant variation of the share of seismic energy radiated during a fault slip event. The obtained results lead to the conclusion that the radiation efficiency of an earthquake and the fault slip mode are governed by the ratio of two parameters—the rate of decrease of resistance to shear along the fault and the shear stiffness of the enclosing massif. The ideas developed were used to determine the principal possibility to artificially transform the slidding regime of a section of a fault into a slow deformation mode with a low share of seismic wave radiation.

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Section: Localization Of Deformations and Hierarchy Of Faultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fault Sliding Modes—Governing, Evolution and Transformation

Kocharyan

Остапчук

Павлов

2020

Springer Tracts in Mechanical Engineering

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“…The model adequately described the laws of deformation for a block system and the temporal correlations typical of systems with self-organized criticality. The proposed model differs in principle from those studied previously (see, e.g., [2][3][4][5][6][7][8][9][10][11]) by taking into account the real topology of the creep of a continental platform on a thinner oceanic platform.…”

Section: Three-dimensional System and Reduced Frontal Motion Modelmentioning

confidence: 99%

“…Therefore, it is impossible to exert a targeted influence on the dynamics of earthquakes by local effects of limited energy. However, the works [6][7][8][9][10], based both on modeling by movable cellular automaton and full-scale experiments (on one of the active faults of the Baikal rift zone) suggest the principal possibility of releasing the accumulated elastic energy due to controlled low energy actions (vibration load and watering).…”

Section: Introductionmentioning

confidence: 99%

Study of Dynamics of Block-Media in the Framework of Minimalistic Numerical Models

Filippov

Popov

2020

Springer Tracts in Mechanical Engineering

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One of the principal methods of preventing large earthquakes is stimulation of a large series of small events. The result is a transfer of the rapid tectonic dynamics in a creep mode. In this chapter, we discuss possibilities for such a transfer in the framework of simplified models of a subduction zone. The proposed model describes well the basic characteristic features of geo-medium behavior, in particular, statistics of earthquakes (Gutenberg Richter and Omori laws). Its analysis shows that local relatively low-energy impacts can switch block dynamics from stick–slip to creep mode. Thus, it is possible to change the statistics of seismic energy release by means of a series of local, periodic, and relatively low energy impacts. This means a principal possibility of “suppressing” strong earthquakes. Additionally, a modified version of the Burridge-Knopoff model including a simple model for state dependent friction force is derived and studied. The friction model describes a velocity weakening of friction between moving blocks and an increase of static friction during stick periods. It provides a simplified but qualitatively correct stability diagram for the transition from smooth sliding to a stick–slip behavior as observed in various tribological systems. Attractor properties of the model dynamic equations were studied under a broad range of parameters for one- and two-dimensional systems.

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Deformation and seismic effects in the ice cover of Lake Baikal

Ruzhich

Psakhie

Черных

et al. 2009

Russian Geology and Geophysics

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The mechanics of the ice cover of Lake Baikal has been studied through monitoring of its deformation and seismic effects and full-size uniaxial compression and shear tests in 2005–2007. We measured the shear strength of ice specimens and large in situ blocks (σ = 0.2−1.9 MPa) and investigated it as a function of air temperature and ice structure. Deformation was analyzed in terms of various natural controls, such as air temperature and pressure, wind, sub-ice currents, and local earthquakes. Precise strain measurements along ice cracks were used to explore the strain behavior of ice, including the cases of dynamic failure (ice shocks). Measurements by seismic station Baikal-12 were used to monitor diurnal background microseismicity variations and to record an ice quake with its magnitude (M = 0.3–0.8; E = 104–105 J) comparable to a medium-size rock burst or a small earthquake. Ice quakes were studied in terms of their nucleation, dynamics, and aftereffects, as well as the strain and seismic responses of the ice, using sub-ice explosions in the latter case. The natural conditions of deformation in the elastoviscoplastic Baikal ice are similar to lithospheric processes and thus can be employed in tectonophysical modeling with scientific and practical implications for hazard mitigation.

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Influence of the State of Interfaces on the Character of Local Displacements in Fault-Block and Interfacial Media

Cited by 11 publications

References 3 publications

Fault Sliding Modes—Governing, Evolution and Transformation

Fault Sliding Modes—Governing, Evolution and Transformation

Study of Dynamics of Block-Media in the Framework of Minimalistic Numerical Models

Deformation and seismic effects in the ice cover of Lake Baikal

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