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A non-contact bridge internal reinforcement stress monitoring method and monitoring device

A steel stress, non-contact technology, applied in the measurement of the change force of the material magnetic properties caused by the applied stress, can solve the problems of destroying the local structure and not suitable for regular monitoring

Active Publication Date: 2021-11-16
CHONGQING JIAOTONG UNIVERSITY +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the stress release method is a local damage monitoring method, which will destroy the local structure of the concrete bridge structure, and can only be sampled and monitored for fixed points, which is not suitable for regular monitoring

Method used

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  • A non-contact bridge internal reinforcement stress monitoring method and monitoring device
  • A non-contact bridge internal reinforcement stress monitoring method and monitoring device
  • A non-contact bridge internal reinforcement stress monitoring method and monitoring device

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Experimental program
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Effect test

Embodiment 1

[0045] This embodiment discloses a non-contact method for monitoring the stress of steel bars inside a bridge.

[0046] Such as figure 1 Shown: Non-contact bridge internal reinforcement stress monitoring method, including

[0047] Pre-establish the stress state monitoring model of the dependency relationship between the stress state of the bridge internal reinforcement and the deviation rate of the bridge surface leakage magnetic field;

[0048] Collect the leakage magnetic field intensity when there is an external load on the bridge surface and when there is no external load, and calculate the deviation rate of the leakage magnetic field. According to the deviation rate of the leakage magnetic field on the bridge surface and the stress state monitoring model, the stress state of the steel bars inside the bridge is judged.

Embodiment 2

[0050] In this embodiment, a stress monitoring device based on the non-contact bridge internal reinforcement stress monitoring method in the first embodiment is disclosed.

[0051] Such as figure 2 Shown: The non-contact bridge internal reinforcement stress monitoring device includes a magnetic sensor array, a serial port server and a monitor. The magnetic sensor array is connected to the serial port server for data transmission, and the serial port server is connected to the monitor for data transmission.

[0052] Specifically: the magnetic sensor array includes a number of magnetic sensors arranged on the surface of the bridge, and the magnetic sensors are used to collect the leakage magnetic field signal at the measuring point on the bridge surface; Arranged on the surface of the bridge facing the steel bars inside the bridge; the serial port server is used to receive the leakage magnetic field signal collected by each magnetic sensor in the magnetic sensor array, and send...

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Abstract

The present invention relates to the technical field of steel bar stress monitoring, in particular to a non-contact bridge internal steel bar stress monitoring method and a monitoring device. State monitoring model; respectively collect the leakage magnetic field intensity when there is an external load on the bridge surface and when there is no external load, and calculate and generate the leakage magnetic field deviation rate, and judge the stress state of the steel bars inside the bridge according to the leakage magnetic field deviation rate on the bridge surface combined with the stress state monitoring model . The monitoring device includes: a magnetic sensor array, a serial server and a monitor, the magnetic sensor array is connected to the serial server for data transmission, and the serial server is connected to the monitor for data transmission. The method for monitoring steel bar stress inside a bridge of the present invention is suitable for long-term monitoring without destroying the structure of the bridge, and can improve the monitoring effect of steel bar stress.

Description

technical field [0001] The invention relates to the technical field of steel bar stress monitoring, in particular to a non-contact bridge internal steel bar stress monitoring method and a monitoring device. Background technique [0002] Among many bridge structures, reinforced concrete structure has become the main structural form of modern large-scale bridge projects due to its good durability, fire resistance, integrity and moldability, and the advantages of saving steel. Among the typical diseases of reinforced concrete bridges, the fatigue stress failure of the bridge, the corrosion of steel bars and the resulting stress concentration damage are the main factors affecting the durability of reinforced concrete structures. However, during the service process, the disease of the structure will become more and more serious with the passage of time and environment, which will eventually pose a huge threat to the safety and durability of the structure. Therefore, it is very n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/12
CPCG01L1/12
Inventor 周建庭周应新汪永林赵瑞强张洪钱正富曾维成屈英豪廖棱陈悦
Owner CHONGQING JIAOTONG UNIVERSITY