Bridge deck slab longitudinal unequal strength steel-concrete composite structure bridge and construction method thereof

A composite structure and bridge deck technology, applied to bridges, bridge parts, bridge materials, etc., can solve problems such as high cracking risk and reduced stiffness, improve long-term service performance and durability, increase strength and stiffness, and reduce steel consumption volume effect

Inactive Publication Date: 2015-08-12
TSINGHUA UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

For continuous composite beam bridges or composite rigid frame bridges, the composite beams at the intermediate supports or pier columns are in the negative moment zone, and the upper concrete deck is in tensi

Method used

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  • Bridge deck slab longitudinal unequal strength steel-concrete composite structure bridge and construction method thereof
  • Bridge deck slab longitudinal unequal strength steel-concrete composite structure bridge and construction method thereof
  • Bridge deck slab longitudinal unequal strength steel-concrete composite structure bridge and construction method thereof

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Embodiment Construction

[0024] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0025] The bridge deck longitudinal unequal strength composite structure bridge provided by the present invention comprises ultra-high performance concrete 1, ordinary concrete 2 and steel girder (by upper flange 3, web 4 and base plate 5), such as figure 1 with figure 2 shown.

[0026] In order to ensure the combined effect of the steel beam and the concrete slab, a connector with shear and pull resistance can be welded above the upper flange 3 of the steel beam, and the connector can use studs 6, such as image 3 shown.

[0027] According to engineering needs, a certain number of stressed steel bars and structural steel bars 7 can be arranged in ultra-high performance concrete 1 and ordinary concrete 2, such as image 3 with Figure 4 As shown, a certain number of steel fibers (not shown in the figure) are arranged in the ultra-high p...

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Abstract

The invention relates to a bridge deck slab longitudinal unequal strength steel-concrete composite structure bridge and a construction method thereof and belongs to a novel bridge structural system applied to a continuous composite girder bridge or a composite rigid frame bridge. The bridge deck slab longitudinal unequal strength steel-concrete composite structure bridge of the invention is composed of super-high-performance concrete, ordinary concrete and steel beams. According to the ridge deck slab longitudinal unequal strength steel-concrete composite structure bridge of the invention, shear-resisting connection components and upper concrete plates are connected with each other so as to form an integrated body and work jointly, and therefore, the strength and rigidity of the bridge can be improved, and the quantity of steel consumption of the whole bridge can be decreased. The bridge deck slab longitudinal unequal strength steel-concrete composite structure bridge of the invention has respective advantages of an ordinary composite bridge deck system and super-high-performance concrete, and the advantages of high strength, high rigidity, excellent anti-cracking performance, high durability, easiness in construction and the like, and has a broad application prospect in composite structure bridges on which negative moment regions exist, such as a continuous girder bridge and a rigid frame bridge.

Description

technical field [0001] The invention relates to a new type of bridge structure applied to continuous composite girder bridges or composite rigid frame bridges, and belongs to the technical field of bridge engineering. Background technique [0002] When the span of the bridge is large, the continuous girder bridge or rigid frame bridge scheme can significantly reduce the peak value of the bending moment under the action of the vertical load, reduce the material consumption of the bridge, and improve the comprehensive economy. For continuous composite beam bridges or composite rigid frame bridges, the composite beams at the intermediate supports or pier columns are in the negative moment zone, and the upper concrete deck is in tension, so there is a high risk of cracking. However, the composite beam after the cracked concrete slab not only reduces the stiffness, but also has serious problems in long-term service performance and durability. In order to improve the anti-crack p...

Claims

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Application Information

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IPC IPC(8): E01D19/12E01D19/00E01D101/26
Inventor 聂建国樊健生刘诚潘文豪
Owner TSINGHUA UNIV
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