Light bridge deck composite reinforcement structure for solving bridge deck fatigue cracking problem

A technology for fatigue cracking and strengthening structures, which is applied in the direction of bridge reinforcement, bridges, bridge parts, etc. It can solve the problems of cracking at the bottom of the ultra-high performance concrete layer, uneven shear stiffness of the interface, and large weld length, etc., to achieve interlayer connection Reliable, extended fatigue life, high tensile strength effect

Pending Publication Date: 2019-02-15
HUNAN ZHONGLU HUACHENG BRIDGE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. The existing patented technology does not consider the cracks in the original steel bridge deck in the orthotropic steel deck structure, especially the cracks in the longitudinal beam at the weld between the steel bridge deck and the longitudinal stiffener, which will seriously affect the steel bridge deck. Therefore, it can only be used for either new steel bridges or steel bridges with repaired fatigue cracks in the steel bridge deck. cracking ability, otherwise it will lead to cracking of the bottom surface of the ultra-high performance concrete layer
[0007] 2. The existing patented technology welds steel bars on the original steel bridge deck as a shear connector, and the length of the weld is relatively large
[0008] 3. The existing technology considers that there is no need to set additional shear connectors in the light composite structure, and only partially welded steel mesh is used as the shear member, which will lead to uneven shear stiffness of the interface between the ultra-high performance concrete layer and the steel bridge deck , it is very likely that shear failure will occur

Method used

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  • Light bridge deck composite reinforcement structure for solving bridge deck fatigue cracking problem
  • Light bridge deck composite reinforcement structure for solving bridge deck fatigue cracking problem
  • Light bridge deck composite reinforcement structure for solving bridge deck fatigue cracking problem

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Embodiment 1

[0035] Embodiment 1, refer to Figure 1 to Figure 4 , including the cracked steel bridge deck, shear connectors, steel mesh, ultra-high performance concrete layer and wear layer, the shear connectors are set on the cracked steel bridge deck, and the steel mesh is placed on the cracked steel bridge deck Above, the ultra-high-performance concrete layer is poured on the cracked steel bridge deck, and the shear connector is covered, and the steel mesh is connected to the cracked steel bridge deck, and the wearing layer is covered with the ultra-high-performance concrete layer.

Embodiment 2

[0036]Embodiment 2, the steel mesh of the present invention is made up of longitudinal steel bars and transverse steel bars that criss-cross each other, including adopting a three-layer steel mesh structure, the transverse steel bars of the three-layer steel mesh structure are located at the upper and lower layers of the steel mesh, and the longitudinal steel bars are located at the upper and lower layers of the steel mesh. In the middle layer, the spacing of the transverse steel bars of the upper layer and the lower layer may be the same or different. refer to Figure 1 to Figure 4 , and the rest are the same as the combination of any of the above embodiments or two or more embodiments.

Embodiment 3

[0037] Embodiment 3, the positions of the upper layer transverse reinforcement and the lower layer transverse reinforcement of the reinforcement mesh of the present invention can be on the same vertical line. refer to Figure 1 to Figure 4 , and the rest are the same as the combination of any of the above embodiments or two or more embodiments.

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Abstract

The invention discloses a light bridge deck composite reinforcement structure for solving the bridge deck fatigue cracking problem. According to key points of the technical scheme, the light bridge deck composite reinforcement structure comprises a cracked steel bridge deck, shear connecting pieces, reinforcing meshes, an ultra-high performance concrete layer and a wearing layer. The cracked steelbridge deck is provided with the shear connecting pieces, and the reinforcing meshes are placed on the cracked steel bridge deck. The ultra-high performance concrete layer is poured onto the crackedsteel bridge deck and covers the connecting pieces and the reinforcing meshes to be connected with the cracked steel bridge deck. The wearing layer covers the ultra-high performance concrete layer.

Description

technical field [0001] The invention relates to a bridge structure used for reinforcing orthotropic steel bridge decks, in particular to a light bridge deck combined reinforcement structure for solving the bridge deck fatigue cracking problem. Background technique [0002] Orthotropic steel decks have the advantages of light weight, high bearing capacity, and convenient construction, and have been widely used in long-span bridges at home and abroad. However, the local stiffness of the traditional orthotropic steel bridge deck is low, and fatigue cracks are prone to appear on the steel bridge deck under the action of high-frequency heavy-duty traffic. my country has been using orthotropic steel bridge decks since the 1970s. With the continuous accumulation of bridge service time and the continuous growth of traffic volume, fatigue cracks have been observed on the bridge decks of many steel bridges, such as the famous Guangdong Humen Bridge in my country. Different degrees of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00E01D19/12E01D19/08
CPCE01D22/00E01D19/083E01D19/125
Inventor 曹君辉邵旭东王洋张法肖建忠
Owner HUNAN ZHONGLU HUACHENG BRIDGE TECH CO LTD
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