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Combined steel bridge deck slab based on bonded steel fiber concrete and paving method of combined steel bridge deck slab

A technology of steel fiber concrete and steel bridge deck, which is applied in bridges, buildings, bridge parts, etc., can solve the problems of insufficient durability of orthotropic steel bridge deck pavement, achieve good combination effect and reduce thickness , The effect of reducing the amplitude of fatigue stress

Active Publication Date: 2017-11-03
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing design methods for orthotropic steel bridge decks are not sufficient to solve fatigue and pavement durability problems of orthotropic steel bridge decks

Method used

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  • Combined steel bridge deck slab based on bonded steel fiber concrete and paving method of combined steel bridge deck slab
  • Combined steel bridge deck slab based on bonded steel fiber concrete and paving method of combined steel bridge deck slab
  • Combined steel bridge deck slab based on bonded steel fiber concrete and paving method of combined steel bridge deck slab

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] see figure 1 , The combined steel bridge deck based on bonded steel fiber concrete in this embodiment is composed of a steel cover plate 1, an adhesive layer 2, and an ultra-high performance steel fiber concrete 3. The thickness of the steel cover plate 1 of the present embodiment is 16mm, and the bonding layer 2 is made up of the epoxy resin glue layer and the silica sand embedded in the epoxy resin glue layer, and the thickness of the bonding layer 2 is 6mm. The resin glue is Sika 30 epoxy resin glue, and the silica sand with a particle size of 4-6mm is embedded in the 4mm epoxy resin glue layer to improve the friction coefficient of the bonding section and ensure the combination effect of the bonding layer 2. The bonding layer 2 is covered with cast-in-place ultra-high-performance steel fiber concrete 3 with a thickness of 35mm, so that the thickness ratio of the cover plate to the bonding layer 2 and the pavement layer of ultra-high-performance steel fiber concrete ...

Embodiment 2

[0072] The combined steel bridge deck based on bonded steel fiber concrete in this embodiment is composed of a steel cover plate 1 , an adhesive layer 2 , and an ultra-high performance steel fiber concrete 3 . The thickness of the steel cover plate 1 is the same as that of the first embodiment, and the composition and thickness of the bonding layer 2 are the same as those of the first embodiment. at 1m 3 The ultra-high performance steel fiber reinforced concrete 3 is composed of the following mass ratio materials:

[0073]

[0074] In the above proportions, the models and specifications of cement, silica fume, standard sand, steel fiber, and water reducer are the same as in Example 1.

[0075] The preparation method of ultra-high performance steel fiber reinforced concrete 3 is the same as that of Example 1.

[0076] The paving method is the same as in Example 1, and a composite steel bridge deck based on bonded steel fiber concrete is paved.

Embodiment 3

[0078] The combined steel bridge deck based on bonded steel fiber concrete in this embodiment is composed of a steel cover plate 1 , an adhesive layer 2 , and an ultra-high performance steel fiber concrete 3 . The thickness of the steel cover plate 1 is the same as that of the first embodiment, and the composition and thickness of the bonding layer 2 are the same as those of the first embodiment. at 1m 3 The ultra-high performance steel fiber reinforced concrete 3 is composed of the following mass ratio materials:

[0079]

[0080] In the above proportions, the models and specifications of cement, silica fume, standard sand, steel fiber, and water reducer are the same as in Example 1.

[0081] The preparation method of ultra-high performance steel fiber reinforced concrete 3 is the same as that of Example 1.

[0082] The paving method is the same as in Example 1, and a composite steel bridge deck based on bonded steel fiber concrete is paved.

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Abstract

A combined steel bridge deck slab based on bonded steel fiber concrete is characterized in that a bonding layer is arranged on the upper surface of a steel cover plate, ultra-high-performance steel fiber concrete is arranged on the upper surface of the bonding layer, and the thickness ratio of the steel cover plate, the bonding layer and the ultra-high-performance steel fiber concrete is 1: 0.3-0.6: 1.5-2.5. The paving method comprises the following steps: pretreatment of the steel cover plate, paving of the bonding layer, preparation of an ultra-high-performance steel fiber mixture, and paving of an ultra-high-performance steel fiber concrete layer. The comprehensive purposes of improving local rigidity, reducing fatigue stress amplitude and prolonging the service life of a paving layer are achieved. Compared with the traditional concrete paving layer, the combined steel bridge deck slab based on bonded steel fiber concrete has the characteristics that the ultra-high-performance steel fiber concrete paving layer is used, the thickness of the paving layer can be reduced, furthermore, the thickness of the cover plate of the bridge deck slab is reduced, the dead weight of the bridge deck slab is also reduced, and materials are saved.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a steel bridge deck. Background technique [0002] Orthotropic steel bridge deck is a bridge deck structure in which longitudinal stiffeners, transverse stiffeners and deck decks are welded together to bear wheel loads. It is widely used in bridges all over the world for its advantages of light weight, saving steel and high bearing capacity. It is widely used in long-span bridges. At present, most long-span steel bridge deck structures are paved with concrete pavement or asphalt mixture with a thickness of 35mm to 80mm. However, the existing engineering experience shows that the fatigue problem of orthotropic steel bridge deck and the damage of pavement are two typical diseases of orthotropic steel deck structure, and they are also worldwide problems, which seriously affect the service life and safety of the structure. The typical defects of orthotropic s...

Claims

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Application Information

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IPC IPC(8): E01D19/12E01D21/00C04B28/04
Inventor 王春生段兰王茜崔冰王世超奥利维罗乔徐有良欧长阳
Owner CHANGAN UNIV
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