Apparatus for simulating fracture of thrust fault

Abstract

The invention discloses an apparatus for simulating the fracture of a thrust fault. The apparatus comprises a loading device, a supporting device, a testing device, an auxiliary device and a fault model device; fault fracture induced pulse research is carried out with a physical model experiment; and the characteristics and spatial distribution rules of pulse seismic oscillation generated by different seismogenic fault types and different fault parameters are disclosed, so that a seismogenic fault type-based pulse seismic oscillation characteristic model is established. According to the priorart, due to the uncertainty of seismic oscillation and the constrain of observation technologies, the records of impulse type earthquakes obtained in actual earthquakes are not enough to accurately obtain the characteristics of near-fault impulse type seismic oscillation statistically. With the apparatus of the invention adopted, the above problem can be solved; pulses generated by different partsof the fault during the fracture of the thrust fault can be studied; and pulse characteristics and distribution rules during the fracture of the fault are recorded.

Description

technical field [0001] The invention relates to the technical field of geological sciences, in particular to a device for simulating thrust fault rupture. Background technique [0002] The rupture mechanism of seismic faults has a great influence on the generation of pulse ground motions and their intensity parameters. With the development of science and technology, more and more pulse ground motions have been recorded, and the research on its damage to engineering structures has become more and more in-depth. In the Northridge earthquake in 1994, the Kobe earthquake in 1995, and the earthquake in 1999, a large number of studies have shown that under the same seismic moment magnitude and site conditions, compared with far-field earthquakes, near-field pulse-type earthquakes have more impact on engineering structures. Great destructive power. In general, pulse ground motions are caused by the forefield directional effect and slide effect in seismic fault rupture. The veloc...

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Problems solved by technology

[0003] Aiming at the above-mentioned deficiencies in the prior art, a device for simulating thrust fault rupture provided by the present invention solves the problem that the pulse-type seismic records obtained from actual earthquakes are not enough due to the uncertainty of the earthquake and the restriction of the observation technology. The problem of obtaining statistically accurate properties of near-fault pulse-type ground motions

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