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Earthquake slope stability analysis method considering sliding surface dynamic progressive damage

A technology of progressive destruction and analysis method, applied in the direction of instrument, design optimization/simulation, electrical digital data processing, etc., can solve the problems of preventing the adverse impact of landslide disasters, the degree of damage, and other problems, and achieve good practical engineering application prospects, physical Meaningful, simple-to-follow effects

Active Publication Date: 2020-06-23
KUNMING UNIV OF SCI & TECH +1
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Severely destructive earthquakes of magnitude 6 or above can cause rapid damage to slopes and a large degree of damage, which can easily induce severe landslide disasters, causing huge casualties and economic losses
[0003] When using the traditional elastoplastic model to analyze the stability of earthquake slopes, it is difficult to characterize the attenuation of the strength parameters of rock and soil materials, which leads to unsafe calculation results and has an adverse effect on the prevention of landslide disasters
However, the process of seismic slope instability shows obvious dynamic progressive failure characteristics, and the stability state often depends on the progressive failure process and damage degree of the sliding surface. The ideal elastic-plastic model to characterize this phenomenon has certain limitations.

Method used

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  • Earthquake slope stability analysis method considering sliding surface dynamic progressive damage
  • Earthquake slope stability analysis method considering sliding surface dynamic progressive damage
  • Earthquake slope stability analysis method considering sliding surface dynamic progressive damage

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Embodiment 1

[0056] Embodiment 1: a kind of seismic slope stability analysis method considering sliding surface dynamic progressive failure (see figure 1 ),Specific steps are as follows:

[0057] (1) Based on the geometric parameters of the slope height, slope angle and step width of the site area, the numerical calculation model of the slope is established by using simulation software, the mechanical parameters of the rock and soil materials of the slope are determined through mechanical tests, and the strength parameter attenuation strain softening model is constructed and Vibration degradation model of the fracture surface; the mechanical parameters of slope rock and soil materials include density, elastic modulus, Poisson's ratio, cohesion, internal friction angle, dilation angle and tensile strength;

[0058] The construction method of the strength parameter decay strain softening model is as follows:

[0059] The linear piecewise function is used to approximate the attenuation law o...

Embodiment 2

[0092] Embodiment 2: a kind of seismic slope stability analysis method considering sliding surface dynamic progressive failure (see figure 1 ),Specific steps are as follows:

[0093] (1) Based on the geometric parameters of the slope height, slope angle and step width of the site area, the numerical calculation model of the slope is established by using simulation software, the mechanical parameters of the rock and soil materials of the slope are determined through mechanical tests, and the strength parameter attenuation strain softening model is constructed and Vibration degradation model of fracture surface; the mechanical parameters of slope rock and soil materials include density, elastic modulus, Poisson's ratio, cohesion, internal friction angle, dilation angle and tensile strength; the specific steps are as follows:

[0094] 1) For engineering geological investigation of stratum occurrence in a certain slope site, FLAC is used 3D Establish a slope numerical calculation...

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Abstract

The invention relates to an earthquake slope stability analysis method considering sliding surface dynamic progressive damage, and belongs to the technical field of slope stability. The method includes: based on the slope sliding surface damage evolution rule under the earthquake effect, obtaining strength parameter characteristics and a dynamic attenuation law of the slope geotechnical material by adopting a mechanical test; constructing a characterization material strength parameter attenuation strain softening model and a fracture surface vibration degradation model; based on a dichotomy strength reduction method and a maximum shear strain increment, determining a critical state sliding surface position under a slope static force state; furthermore, by combining a sliding surface dynamic progressive failure theory and a vector sum method, an earthquake side slope safety factor time-history curve is solved in numerical calculation, the stability state of the side slope under the earthquake action is truly reflected, and the accuracy and reliability of a numerical calculation result are improved.

Description

technical field [0001] The invention relates to a method for analyzing the stability of an earthquake slope considering the dynamic progressive failure of a sliding surface, and belongs to the technical field of slope stability. Background technique [0002] Severely destructive earthquakes of magnitude 6 or above can damage slopes quickly and to a large extent, and can easily induce severe landslide disasters, causing huge casualties and economic losses. Accurate analysis of slope stability under earthquake is the theoretical basis for disaster prevention and mitigation and design of seismic support system, which can effectively avoid or reduce landslide disasters caused by earthquakes. [0003] When the traditional elastoplastic model is used to analyze the stability of earthquake slopes, it is difficult to characterize the attenuation of the strength parameters of geotechnical materials, which leads to unsafe calculation results and has an adverse effect on the prevention...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F119/14
CPCY02A10/23
Inventor 吴顺川张化进韩龙强程海勇张小强李浚弘张光
Owner KUNMING UNIV OF SCI & TECH
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