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Geofracture site shaking table model and dynamic response test method

A technology of vibrating table and ground fissure, which is applied in the direction of applying repeated force/pulsation force to test the strength of materials, measuring devices, instruments, etc., and can solve problems such as restricting urban development and hazards

Inactive Publication Date: 2017-05-31
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Ground fissures have caused great harm to the existing buildings in Xi'an area, seriously restricting the development of the city. Xi'an is also an area with an earthquake resistance of 8 degrees, and there will be a greater potential earthquake risk in the future. The research on the dynamic response under the action of earthquake is not yet perfect, and the simulation method needs to be verified by experiments. Therefore, the research on the design and design of the ground fissure shaking table test has important engineering practical value

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  • Geofracture site shaking table model and dynamic response test method
  • Geofracture site shaking table model and dynamic response test method
  • Geofracture site shaking table model and dynamic response test method

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Embodiment 1

[0071] Such as Figure 1a As shown, this embodiment discloses a ground fissure site shaking table model, including a shaking table, a model soil box arranged in the center of the shaking table, and a model soil body filled in the model soil box. In this embodiment, comprehensively considering factors such as the performance index of the shaking table, site construction conditions, laboratory hoisting capacity, and referring to the "Tangyan Road Underground Civil Air Defense Engineering Geotechnical Engineering Geological Survey Report", the shaking table test model proposes that the geometric similarity ratio of the above structure is 1 / 15 , the size of the model soil is similar to the corresponding ratio of 1 / 15. Using a shear model soil box, according to the analysis of the original soil crack site, considering the size of the shaking table and the bearing capacity, the size of the model soil box designed in this implementation is 3.0m (length)*1.5m (width)*1.5 m (height), t...

Embodiment 2

[0077] The difference between Embodiment 2 and Embodiment 1 is that the physical and mechanical indexes of each soil layer are different, and the inclination angles of ground fissures are different:

[0078] The model soil body includes loess, ancient soil, and silty clay layered in sequence from top to bottom. Ground fissures are formed in the model soil body. The soil layers on both sides of the ground fissure are arranged in staggered layers. The angle of inclination of the crack relative to the horizontal plane is 80°;

[0079] The mechanical indexes of the loess are: water content 23.5%; weight 16.8kNm -3 ; Cohesion 2.4kPa; Internal friction angle 27.6°; Poisson's ratio (μ) 0.34; Compression modulus (Es) 8.01MPa; Shear modulus (G) 110.49MPa; Elastic modulus (E) 296.11MPa;

[0080] The mechanical indexes of the ancient soil are: moisture content 22.9%; weight 17.8kNm -3 ; Cohesion 2.45kPa; Internal friction angle 27.3°; Poisson's ratio (μ) 0.34; Compression modulus (Es) ...

Embodiment 3

[0083] The difference between embodiment three and embodiment one is only that the physical and mechanical indexes of each soil layer are different, and the inclination angles of ground fissures are different:

[0084] The model soil body includes loess, ancient soil, and silty clay layered in sequence from top to bottom. Ground fissures are formed in the model soil body. The soil layers on both sides of the ground fissure are arranged in staggered layers. The angle of inclination of the crack relative to the horizontal plane is 90°;

[0085] The mechanical indexes of the loess are: water content 25%; weight 18kNm -3 ; Cohesion 5kPa; Internal friction angle 30°; Poisson's ratio (μ) 0.34; Compression modulus (Es) 10MPa; Shear modulus (G) 120MPa; Elastic modulus (E) 300MPa;

[0086] The mechanical indexes of the ancient soil are: moisture content 25%; weight 18kNm -3 ; Cohesion 5kPa; Internal friction angle 30°; Poisson's ratio (μ) 0.34; Compression modulus (Es) 10MPa; Shear m...

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Abstract

The invention provides a geofracture site shaking table model, which comprises a shaking table, a model soil box, and model soil tightly filled in the model soil box. The model soil comprises a yellow soil layer, an ancient soil layer, and a silty clay layer from top to bottom. A geofracture is formed in the model soil. Layers on two sides of the geofracture are staggeredly arranged. The inclined angle formed by the geofracture and the horizontal plane is 80 degrees. The provided geofracture site shaking table model can accurately measure the influence of geofracture on dynamic response of stratums under the effect of earthquake in a lab so as to obtain the dynamic response rules of a geofracture site and meaningful research results; a good testing method is provided for testing the geofracture destruction under the earthquake effect; references are provided for the research on shaking table; the damages caused by earthquake can be reasonably and scientifically treated, and proper processes are provided for reinforcing buildings.

Description

technical field [0001] The invention relates to a shaking table model, in particular to a shaking table model based on Xi'an ground fissure activity and a dynamic response test method based on the model. Background technique [0002] Ground fissures have caused great harm to the existing buildings in Xi'an area, seriously restricting the development of the city. Xi'an is also an area with an earthquake resistance of 8 degrees, and there will be a greater potential earthquake risk in the future. The research on the dynamic response under the action of earthquake is not yet perfect, and the simulation method needs to be verified by experiments. Therefore, the research on the design and design of the ground fissure shaking table test has important engineering practical value. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a ground fissure site shaking table model, which can be used to study the dynamic respons...

Claims

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Application Information

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IPC IPC(8): G01N3/02G01N3/32
CPCG01N3/02G01N3/32
Inventor 韦俊熊仲明霍晓鹏张朝陈轩
Owner SUZHOU UNIV OF SCI & TECH
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