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Anti-fatigue strengthening structure of steel bridge deck for reducing fatigue stress

A steel bridge deck, fatigue stress technology, applied in bridges, bridge parts, bridge construction and other directions, can solve the problems of steel bridge fatigue and stress reduction, and achieve the effect of shear stiffness recovery, stress reduction, and stress level reduction.

Inactive Publication Date: 2017-05-17
CHINA RAILWAY BRIDGE SCI RES INST LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can greatly reduce the stress of the key fatigue cracking details of the steel bridge deck, effectively solving the fatigue problem of the steel bridge

Method used

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  • Anti-fatigue strengthening structure of steel bridge deck for reducing fatigue stress
  • Anti-fatigue strengthening structure of steel bridge deck for reducing fatigue stress

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment one: if figure 1 As shown, on the basis of the above-mentioned technical solution, in this embodiment, the upper part of the support plate 2 is provided with a U-shaped groove that matches the bottom of the U rib 4, and the upper surface of the support plate 2 is connected to the U rib by a pressing method. 4 close, the quantity of high-strength bolt 3 and connection hole 8 is four, and inner partition plate opening 7 is a circular hole.

Embodiment 2

[0029] Embodiment two: if figure 2 As shown, the difference between the second embodiment and the first embodiment is that the upper surface of the support plate 2 is flat, and the upper surface of the support plate 2 is in close contact with the bottom of the U rib 4 . There are two high-strength bolts 3 and connecting holes 8, and the opening 7 of the inner partition is an oval hole. In practical applications, the diameter and number of the high-strength bolts 3 can be determined according to the force of the real bridge.

[0030] In addition, the anti-fatigue reinforced structure of the present invention has passed 5 million fatigue loading tests on real bridge segments of large-scale orthotropic steel bridge decks, which proves that it can reduce the stress of the main fatigue details by more than 30%, and no fatigue cracks occur during the test , indicating that the present invention can effectively improve the fatigue strength of U ribs and details related to the diaph...

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Abstract

The invention discloses an anti-fatigue strengthening structure of a steel bridge deck for reducing fatigue stress comprising a top plate, a U-shaped rib and a transverse division plate which are respectively welded to the top plate, wherein the anti-fatigue strengthening structure is characterized in that an inner division plate is arranged inside the U-shaped rib; and a support plate is arranged under the U-shaped rib and is fixed on the transverse division plate. The anti-fatigue strengthening structure of the steel bridge deck for reducing fatigue stress has the advantages of simple structure and low cost, and can greatly reduce the stress of the main fatigue cracking details of the steel bridge deck, thereby effectively alleviating or solving the fatigue stress problem of the steel bridge. The anti-fatigue strengthening structure of the steel bridge deck for reducing fatigue stress has significant scientific research value and economic effect.

Description

technical field [0001] The invention relates to the field of steel bridge structure stress and steel structure fatigue, in particular to a steel bridge deck anti-fatigue strengthening structure for reducing fatigue stress. Background technique [0002] Steel structure bridge is a kind of green and environment-friendly bridge structure. The proportion of steel structure bridges in France, Japan, the United States and other countries is 85%, 41% and 35% respectively. my country is restricted by the level of economic and social development and steel production capacity. Steel structure Bridges are mainly used for extra long span bridges. As of the end of 2015, my country's road steel structure bridges accounted for less than 1%. Under the background of national iron and steel production capacity reduction, the Ministry of Transport encourages the construction of highway steel structure bridges, and the number of steel bridges gradually increases; at the same time, the rapid eco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/00E01D19/12
CPCE01D19/00E01D19/125
Inventor 梁振西田启贤卢刚
Owner CHINA RAILWAY BRIDGE SCI RES INST LTD
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