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Composite steel bridge deck based on bonded steel fiber reinforced concrete and its paving method

A technology of steel fiber reinforced concrete and steel bridge deck, which is applied in the directions of bridges, buildings, bridge parts, etc., can solve the problems such as insufficient solution to the durability problem of orthotropic steel bridge deck pavement, and achieves good combination effect and convenient maintenance. , the effect of reducing the fatigue stress amplitude

Active Publication Date: 2019-10-11
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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  • Composite steel bridge deck based on bonded steel fiber reinforced concrete and its paving method
  • Composite steel bridge deck based on bonded steel fiber reinforced concrete and its paving method
  • Composite steel bridge deck based on bonded steel fiber reinforced concrete and its paving method

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 steel cover plate 1, bonding layer 2, and ultra-high performance steel fiber concrete 3. The thickness of the steel cover plate 1 of this embodiment is 16mm, the adhesive layer 2 is composed of an epoxy resin adhesive layer and silica sand embedded with the epoxy resin adhesive layer, and the thickness of the adhesive layer 2 is 6mm. The epoxy resin of this embodiment The resin glue is made of Sika 30 epoxy resin glue, and silica sand with a particle size of 4-6mm is embedded in the 4mm epoxy resin glue layer to increase the friction coefficient of the bonding section and ensure the combined 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 to the bonding layer 2, the ultra-high-performance steel fiber concrete 3 pave...

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, a bonding 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 embodiment 1, and the composition and thickness of the adhesive layer 2 are the same as that of the embodiment 1. At 1m 3 The ultra-high performance steel fiber concrete 3 is made of materials with the following mass ratios:

[0073]

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

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

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

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, a bonding 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 embodiment 1, and the composition and thickness of the adhesive layer 2 are the same as that of the embodiment 1. At 1m 3 The ultra-high performance steel fiber concrete 3 is made of materials with the following mass ratios:

[0079]

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

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

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

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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 specifically relates to a steel bridge deck. Background technique [0002] Orthotropic steel bridge deck is a bridge deck structure that welds longitudinal stiffeners, transverse stiffeners and bridge decks into a whole to bear the load of wheels. It has the advantages of light weight, steel saving, and high bearing capacity in bridges all over the world. It is widely used in long-span bridges. At present, most of the large-span steel bridge deck structures are pavement with concrete pavement or asphalt mixture with a thickness of 35mm to 80mm. However, existing engineering experience has shown that fatigue problems and pavement damage of orthotropic steel bridge decks are two typical diseases of orthotropic steel bridge deck structures, and they are also a worldwide problem that seriously affects the service life and safety of the structure. According to the analysis of the typical d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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