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Structural damage detection method using carbon fiber resistance change

A technology of change detection and carbon fiber, which is applied in the field of analysis and detection, can solve problems that cannot truly reflect the health status of building structures, and achieve the effect of ensuring accuracy and synchronization

Pending Publication Date: 2019-03-01
中国南水北调集团东线有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention not only uses the change of carbon fiber resistance to detect the health status of the building structure and the development of damage; but also overcomes the problem that the health status of the building structure cannot be truly reflected due to the non-linear change of the resistance during the detection process.

Method used

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  • Structural damage detection method using carbon fiber resistance change
  • Structural damage detection method using carbon fiber resistance change

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 Shown, a kind of building structure that is suitable for the change detection health condition of carbon fiber resistance value, comprises building body 1, glued layer 2 and carbon fiber plate 3, and described glued layer 2 is coated on the surface of building body 1, and described carbon fiber The board 3 is glued on the glued layer 2; said glued 2 layer is an epoxy resin adhesive. In this building structure of the present invention, the carbon fiber board is pasted on the building with a glue-like epoxy resin adhesive, which can prevent the non-linear problem of the resistance change of the carbon fiber board caused by the change of the building structure during the detection process, and cause inaccurate detection values. , can not really reflect the health status of the building structure.

Embodiment 2

[0036] Such as figure 1Shown, a kind of building structure that is suitable for the change detection health condition of carbon fiber resistance value, comprises building body 1, glued layer 2 and carbon fiber plate 3, and described glued layer 2 is coated on the surface of building body 1, and described carbon fiber The board 3 is glued on the glued layer 2; said glued 2 layer is an epoxy resin adhesive. The material of the carbon fiber plate includes polyacrylonitrile-based carbon fiber, pitch-based carbon fiber or phenolic-based carbon fiber and the like.

Embodiment 3

[0038] Such as figure 2 As shown, a device for detecting the health status of a building structure by using the change of carbon fiber resistance value includes electrodes 4, terminals 5, a first voltmeter 6, a DC power supply 7, a second voltmeter 8, a standard resistor 9, a switch 10 and a base 11.

[0039] The electrodes 4 are two groups, symmetrically arranged on both sides of the base 11, and the first voltmeter 6 is arranged on the electrodes. During detection, the two groups of electrodes communicate with both ends of the carbon fiber board 3 in the building structure described in Embodiment 1, respectively.

[0040] The terminal posts 5 are two groups, symmetrically arranged on both sides of the base 11, a DC power supply 7 and a standard resistor 9 connected by wires are arranged between the two groups of electrodes, and the two ends of the standard resistor 9 are provided with a second Two voltmeters 8, switches 10 are arranged on the wires. During detection, the...

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PUM

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Abstract

The invention belongs to the technical field of analysis and detection, and in particular relates to a structural damage detection method using the carbon fiber resistance change. A building structureincludes a building body, a rubberized layer and a carbon fiber board. The rubberized layer is coated on the surface of the building body, and the carbon fiber board is bonded to the rubberized layer. A device comprises electrodes, binding posts, voltmeters, a power source, a standard resistor, a switch, a base and the like. The electrodes are symmetrically disposed on two sides of the base, andeach electrode is provided with a voltmeter. The binding posts are symmetrically disposed on two sides of the base, the DC power source and the standard resistor connected by a wire are disposed between the two sets of electrodes, the voltmeters are disposed at both ends of the standard resistor, and a switch is disposed on the wire. The method solves the problem that a detection value is inaccurate due to nonlinear resistance change of the carbon fiber board due to change of the building structure during the detection and cannot truly reflect the health condition of the building structure.

Description

technical field [0001] The invention belongs to the technical field of analysis and detection, and in particular relates to a structural damage detection method utilizing changes in the resistance value of carbon fibers. Background technique [0002] Today, people pay more and more attention to the safety inspection of major projects. Damage accumulation and catastrophic behavior of large structures and infrastructures are becoming increasingly prominent. During the use of building structures, under the action of various catastrophic factors, the accumulation of structural damage and the attenuation of resistance will inevitably be caused, which will lead to structural damage and even catastrophic accidents. [0003] At present, concrete is the most widely used structural material in civil engineering, and the detection of concrete structures generally uses methods such as sound, light, electricity, magnetism and rays to measure the physical quantities related to the perfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/04
CPCG01N27/041
Inventor 刘梅张炯夏霜叶茂盛王新华毛德强胡念韩若楠
Owner 中国南水北调集团东线有限公司