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Method for monitoring deformation of pipe concrete filled in steel pipe arch of super-large bridge

A technology of deformation monitoring and steel pipe arching, which is applied to measuring devices, instruments, and optical devices, etc., can solve the problems of denaturation damage, sensor lead corrosion, manual monitoring, etc., and achieve stable properties and long-term stable effects

Active Publication Date: 2019-04-19
GUIZHOU BRIDGE CONSTR GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) The geometric optics measurement method not only consumes a lot of manpower and time costs in the long-term monitoring process, but also cannot guarantee the timeliness of the monitoring data. The monitoring data needs to be manually entered into the database later, and the analysis and monitoring results have an inevitable lag
[0004] (2) The vibrating wire sensor is based on the principle of mechanical structure, with steel wire as the conversion element, and has hysteresis characteristics. Therefore, it can only be applied to static and quasi-dynamic tests not greater than 10Hz
Most of the external conditions of the bridge are the effects of dynamic load, climate, erosion, impact and other emergencies, etc. The applicability of vibrating wire sensors has great limitations
[0005] (3) It is difficult for ordinary sensors to survive effectively for a long time. Under the influence of climate, erosion, impact, other emergencies and electromagnetic interference on the outside of the bridge, it is very easy to cause corrosion and denaturation damage to the sensor and its leads, making it difficult for the sensor to operate normally for a long time
Therefore, ordinary electric measuring sensors will not be able to meet the task of long-term monitoring
[0006] (4) Most of the traditional sensors are point sensors, which are not only complicated in installation and construction, but also have many and messy monitoring lines in the later stage, making it difficult to monitor large areas and large areas. Manual monitoring is required during testing, and real-time online monitoring and evaluation cannot be achieved.
[0008] (6) Most of the existing bridge structure monitoring and status assessment systems belong to a single monitoring system or a single management system, and it is not easy to integrate and integrate a unified monitoring and analysis platform

Method used

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  • Method for monitoring deformation of pipe concrete filled in steel pipe arch of super-large bridge
  • Method for monitoring deformation of pipe concrete filled in steel pipe arch of super-large bridge
  • Method for monitoring deformation of pipe concrete filled in steel pipe arch of super-large bridge

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Embodiment Construction

[0204] The present invention will be further described below in conjunction with the examples, but not as a basis for limiting the present invention.

[0205] Example. A method for monitoring the deformation of concrete in the tube poured into the steel tube arch of a super-large bridge, such as Figure 1 to Figure 8 As shown, by using fiber Bragg grating technology to detect the drift of the central wavelength of reflected light, the strain of the concrete structure poured into the steel pipe arch of the super-large bridge is monitored.

[0206] The method is to use the optical fiber Bragg grating technology to measure the variable of the wavelength value of the optical fiber, calculate the strain, stress and axial force according to the variable of the optical fiber wavelength value, and monitor the strain of the concrete structure poured into the steel pipe arch of the super-large bridge.

[0207] The strain is calculated using the formula: Calculation, where λ z0 , lam...

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Abstract

The invention discloses a method for monitoring deformation of pipe concrete filled in a steel pipe arch of a super-large bridge. The method is characterized in that through utilizing the fiber Bragggrating technology to detect the drift of the center wavelength of the reflected light, the strain of the pipe concrete structure filled in the steel pipe arch of the super-large bridge is monitored.The method is advantaged in that properties of long monitoring distance, large monitoring range, wide monitoring angle, accurate monitoring, high test accuracy and accurate positioning are achieved, properties of low equipment cost, low energy consumption, corrosion resistance, electromagnetic interference resistance, good long-term stability and easy integration can be further achieved, and requirements of deformation monitoring of the pipe concrete filled in the steel pipe arch of the super-large bridge can be satisfied.

Description

technical field [0001] The invention relates to a bridge monitoring method, in particular to a method for monitoring the deformation of concrete inside a tube poured into a steel tube arch of a super-large bridge. Background technique [0002] Through the monitoring and evaluation of the health status of the bridge structure, early warning signals are issued for the bridge under various weather and traffic conditions and when the bridge operation status is abnormal, and the basis for bridge maintenance, repair and management measures is provided, and timely measures are taken to prevent the bridge Collapse, local damage, the purpose of protecting and prolonging the service life of the bridge. my country's bridge structural health monitoring is still in its initial stage. With the deepening of bridge structural health monitoring, it needs to be improved and perfected in remote monitoring, improving system reliability, improving data processing and analysis theory, etc., and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/16
CPCG01B11/165
Inventor 龚辉张胜林刘贤张乙彬杨茂军张力赵伟杨文学刘本富罗文秀郑昌礼陈续燕代全凤
Owner GUIZHOU BRIDGE CONSTR GROUP
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