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Fatigue Performance Evaluation Device for Orthotropic Steel Deck Concrete Pavement

An evaluation device and orthotropic technology, applied in the field of evaluation devices for the performance of orthotropic steel bridge deck concrete pavement

Inactive Publication Date: 2018-06-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problem to be solved by the present invention is to provide an evaluation device for testing the fatigue performance of orthotropic steel bridge deck pavement, so as to solve the defects of existing steel bridge deck pavement performance evaluation

Method used

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  • Fatigue Performance Evaluation Device for Orthotropic Steel Deck Concrete Pavement
  • Fatigue Performance Evaluation Device for Orthotropic Steel Deck Concrete Pavement
  • Fatigue Performance Evaluation Device for Orthotropic Steel Deck Concrete Pavement

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Embodiment 1

[0027] Embodiment 1: Fatigue performance detection device of orthotropic steel bridge deck concrete pavement, described detection device comprises the following parts:

[0028] 1) Composite beam and forming mold: The side mold of the composite beam forming mold is assembled with two channel steels (5) and two steel plates (6). The steel plate (7) at the bottom of the composite beam is directly used as the bottom plate of the mold. After the concrete is hardened, the side forms are removed to obtain a composite beam combining the steel plate (7) and the concrete (8). Composite beam is a form of composite beam combining steel plate and concrete. The type and thickness of the steel plate are the same as those of the real bridge. Shear studs are set in the pavement layer and reinforced according to a certain reinforcement ratio. After the concrete is fully mixed, a custom mold is used. It is poured in the composite beam casting mold that has been welded with shear studs and set wi...

Embodiment 2

[0033] Embodiment 2: Fatigue performance detection method of steel bridge deck concrete composite pavement test beam

[0034] In order to make the equipment, process and data analysis used in the present invention clearer, a composite beam test plan is selected for performance testing and analysis in combination with specific embodiments below and with reference to the accompanying drawings:

[0035] 1) Scheme design

[0036]To study the stress-strain values ​​and fatigue performance of beams under different composite beam forms, conduct 5-factor 2-level orthogonal tests, and select 5 factors including bonding layer setting, shear stud layout, reinforcement ratio, support form and pavement thickness , a total of 8 sets of tests are required, each with 3 parallel specimens, and a total of 24 composite beam specimens have been subjected to five-point bending fatigue tests. The adhesive layer is made of epoxy, with a thickness of 2mm; the size of the shear nails is (diameter 16m...

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Abstract

The invention relates to a method for evaluating fatigue performance of a concrete pavement layer on an orthotropic steel bridge deck, in particular to a device for evaluating fatigue performance. According to the scheme, the method comprises an elastic pressure head loading method simulating wheel loads of an automobile, a steel plate-concrete pavement layer composite beam test piece forming method, a support form simulating stress of U-type ribs on the steel bridge deck, an elastic support for simulating the condition of a real bridge and a composite beam response acquisition and analysis scheme; evaluation indexes comprise fatigue life, stress, deflection and the like of a composite beam. The device can simulate the stress condition of the orthotropic steel bridge deck under the action of wheel loads and can be used for comprehensively and quantitatively evaluating the response condition and the fatigue performance of the concrete pavement layer on the steel bridge deck. The test method is reasonable in design, detailed, accurate and specific, the evaluation method is scientific and systematic, and the operability is higher.

Description

technical field [0001] The invention relates to an evaluation device for the performance of an orthotropic steel bridge deck concrete pavement, in particular to the evaluation of the fatigue performance of the pavement. Background technique [0002] The damage problem of orthotropic steel bridge deck pavement is more serious, and the fatigue performance is an important evaluation index for the performance of steel bridge deck pavement. "Guidelines for Design and Construction Technology of Highway Steel Box Girder Bridge Deck Pavement" puts forward the test device and test method for the repeated bending performance of steel bridge deck pavement on the basis of reference to Japanese and German standards. However, the existing laboratory tests cannot simulate the pavement form of the orthotropic steel deck under real conditions. The simulation of the force mode is not comprehensive enough for the evaluation of the fatigue performance of the steel bridge deck pavement. [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/20G01N3/36
CPCG01N3/20G01N3/36G01N2203/0023G01N2203/0048G01N2203/0067G01N2203/0073
Inventor 叶奋林增龙武金婷宋卿卿崔玉宝
Owner TONGJI UNIV