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Method and device for testing corrosion fatigue of welding nodes of orthotropic steel bridge deck

A steel bridge deck, orthotropic technology, applied in measurement devices, weather resistance/light resistance/corrosion resistance, using optical devices to transmit sensing components, etc., can solve the problems of not considering corrosion fatigue coupling effect and inaccurate results, etc. Achieve the effect of effective and reliable test data, wide measurement range and convenient operation

Active Publication Date: 2019-10-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem that the current corrosion fatigue test device for welded joints of steel bridges usually only considers the effect of corrosion or fatigue single factor, and does not consider the coupling effect of corrosion fatigue, which leads to inaccurate results, a method that fully considers the coupling effect of corrosion fatigue and the measurement results is proposed. Accurate and reliable method and device for corrosion fatigue test of welded joints of orthotropic steel bridge decks based on optical fiber sensing

Method used

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  • Method and device for testing corrosion fatigue of welding nodes of orthotropic steel bridge deck
  • Method and device for testing corrosion fatigue of welding nodes of orthotropic steel bridge deck
  • Method and device for testing corrosion fatigue of welding nodes of orthotropic steel bridge deck

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Embodiment 1

[0029] With reference to accompanying drawing, the test method of steel bridge welded joint corrosion fatigue test device of the present invention may further comprise the steps:

[0030]1) Make a corrosive environment chamber, weld a long cross welding specimen and arrange an optical fiber grating sensor: make and assemble a corrosion environment chamber, weld a long cross-shaped member, and wrap a circle of optical fiber grating strain sensor on the upper part of the weld seam of the long cross member, for Monitor the corrosion of the welded joints of the long cross welded specimen; stick fiber grating strain sensors and optical fiber grating temperature sensors circumferentially at the lower part of the weld of the long cross member to monitor the stress change of the welded joints and the temperature change of the test piece;

[0031] 2) Fatigue test of long cross welded specimens: Take 10 long cross welded specimens, each as a group, 10 groups in total. Using the electro-...

Embodiment 2

[0037] With reference to accompanying drawing, the device that realizes the test method described in embodiment 1 comprises fatigue testing machine 1, and fatigue testing machine 1 connects hydraulic rod 2, is characterized in that: the upper end of hydraulic rod 2 connects upper clamping end 5, fatigue testing machine 1 is connected to the lower clamping end 8, the two ends of the long cross welding test piece 3 are respectively connected to the upper clamping end 5 and the lower clamping end 8, the middle part of the long cross welding test piece 3 is set in the corrosion environment box 4, and the long cross welding The middle part of the test piece 3 is provided with a weld seam to be tested, and a corrosion paste 18 is arranged on the weld seam to be tested; the inner cavity of the corrosion environment box 4 is connected to the water mist releaser 10 through the water mist injection pipe 16, and connected to the water mist discharge pipe 17;

[0038] The long cross weldin...

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Abstract

The invention discloses a method and a device for testing corrosion fatigue of welding nodes of an orthotropic steel bridge deck. The method comprises: 1) assembling a corrosion environment box, manufacturing a long cross welding test piece and arranging a fiber grating sensor; 2) performing a fatigue test on the long cross welding test piece; 3) carrying out a long cross welding test piece corrosion test; 4) establishing a time matching relation of a corrosion-fatigue coupling action process; 5) installing a corrosion environment box and a water mist releaser; 6) long cross welding test piececorrosion-fatigue coupling test data acquisition. The device constructed according to the method comprises the long cross welding test piece, the corrosion environment box, the water mist releaser, afatigue testing machine, a monitoring device and corrosion paste. A device used for executing the method provided by the invention is also provided. According to the method, coupling effect of corrosive media and alternating stress is fully considered, the method is closer to the service environment of the steel bridge welding node in service, and the test data is more effective and reliable; meanwhile, the device is simple and easy to operate, convenient to operate, low in cost and easy to popularize.

Description

technical field [0001] The invention relates to a corrosion fatigue test method and device for welded joints of orthotropic steel bridge decks. Background technique [0002] The corrosion fatigue failure of welded joints on steel bridges is a phenomenon of fatigue fracture under the coupling action of alternating stress and corrosive medium. [0003] Steel structure bridges use high-strength steel as the main construction material, which has high strength, high rigidity, light weight, good seismic performance, low construction difficulty, high degree of industrialization, short construction period, less environmental hazards, strong ductility, and recyclability Comprehensive advantages such as high rate. In recent years, new orthotropic steel bridge deck structures have been developed by leaps and bounds. Therefore, nowadays, closed steel bridge decks with good integrity, high torsional rigidity, and strong bearing capacity are widely used in long-span steel bridges. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/56G01N17/00G01N3/12G01N3/02G01D5/26
CPCG01D5/268G01N3/02G01N3/12G01N3/56G01N17/002G01N17/006G01N2203/0048G01N2203/0073G01N2203/024G01N2203/0272G01N2203/0682G01N2203/0694
Inventor 叶肖伟苏有华宋宸枢
Owner ZHEJIANG UNIV
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