Bolted steel angle-based steel bridge out-of-plane distortion fatigue reinforcement structure

A steel bridge deck and angle steel technology, applied in bridge reinforcement, bridges, bridge parts, etc., can solve the problems of weakening the rigidity of the original structure, and achieve the effects of preventing accidental falls, simple operation, and inhibiting initiation and expansion

Inactive Publication Date: 2014-09-24
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the problem that the out-of-plane deformation reinforcement technology of steel plate girder bridges weakens the rigidity of the original structure, and to provide a structure with reasonable structure, simple structure, superior mechanical performance and convenient construction.

Method used

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  • Bolted steel angle-based steel bridge out-of-plane distortion fatigue reinforcement structure
  • Bolted steel angle-based steel bridge out-of-plane distortion fatigue reinforcement structure
  • Bolted steel angle-based steel bridge out-of-plane distortion fatigue reinforcement structure

Examples

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Embodiment 1

[0017] The reinforced test piece selected in this embodiment is an I-shaped steel beam welded by the flange plate 4, the stiffener 2 and the web 1. The flange plate 4 is a rectangular steel plate with a length of 600 mm, a width of 300 mm, and a thickness of 24 mm; the web plate 1 is a rectangular steel plate with a length of 600 mm, a height of 870 mm, and a thickness of 8 mm; the stiffener 2 is a rectangular steel plate with a length of 120 mm and a height of 790 mm , a rectangular steel plate with a thickness of 6mm; between the flange plate 4 and the stiffener 2 at the web gap, use high-strength bolts to bolt and reinforce the angle steel 3, and leave a distance of 10mm between the side end of the angle steel and the web 1, see Figure 1~2 , The angle steel 3 of the present embodiment selects the equal-leg single angle steel, and the single angle steel selects the standard angle steel of L140mm×140mm×14mm.

[0018] Before the reinforcement, the preparatory work for the rei...

Embodiment 2

[0020] The single angle steel in the above-mentioned embodiment 1 is replaced by a double angle steel whose specification is L140mm * 140mm * 14mm, such as image 3 As shown, other components and their connections are the same as those in Embodiment 1.

[0021] The reinforcement method is the same as in Example 1.

Embodiment 3

[0023] The single angle steel in the above-mentioned embodiment 1 is replaced by a T-shaped angle steel with a specification of 280mm * 140mm * 14mm * 14mm, such as Figure 4 As shown, other components and their connections are the same as those in Embodiment 1.

[0024] The reinforcement method is the same as in Example 1.

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Abstract

The invention relates to a bolted steel angle-based steel bridge out-of-plane distortion fatigue reinforcement structure, and belongs to the technical field of bridge engineering. Web gaps among a steel plate girder web, a stiffening rib and a flange plate are reinforced by a steel angle. One limb of the steel angle is connected with the stiffening rib by high-strength bolts, while the other limb is connected with the flange plate by the high-strength bolts or screws; the structure can effectively improve the mechanical property of the web gaps and inhibit the initiation and propagation of out-of-plane distortion fatigue cracks, and the structure has the characteristics of being convenient in construction, simple in operation, low in cost and excellent in performance; in addition, in the connecting way of combining the steel angle with the screws, the structure not only can be reinforced without removing a concrete bridge deck or blocking traffic, but also can improve the safety and durability of the connection, prevent the steel angle from accidentally falling, and avoid accidents.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a steel bridge surface deformation fatigue reinforcement structure based on bolted angle steel. Background technique [0002] Fatigue problems of steel bridges seriously affect the service life of bridges. Studies have shown that about 90% of fatigue cracking problems in steel bridges are caused by out-of-plane deformation or secondary stress at fatigue-sensitive details. In the design of steel bridges, the transverse connection between the girders is realized through the connection between the cross brace and the vertical stiffener welded to the web of the main girder. Fatigue failure occurs in the welded details, usually leaving a web gap of tens of millimeters between the vertical stiffener and the tension flange of the main girder. In actual operation, under the action of the vehicle load, there will be a deflection difference between the steel girders...

Claims

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Application Information

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IPC IPC(8): E01D22/00E01D19/00
Inventor 王春生孙宇佳闫生龙王茜段兰魏孟春翟慕赛
Owner CHANGAN UNIV
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