CN214573333U

CN214573333U - Bridge deck structure suitable for deformation in hogging moment area of steel-concrete composite beam bridge

Info

Publication number: CN214573333U
Application number: CN202120225596.0U
Authority: CN
Inventors: 陈宜言; 黄光铃; 赵秋
Original assignee: Fuzhou University
Current assignee: Fuzhou University
Priority date: 2021-01-27
Filing date: 2021-01-27
Publication date: 2021-11-02
Anticipated expiration: 2031-01-27

Abstract

The utility model relates to a steel-concrete composite beam bridge hogging moment district bridge floor structure that adaptation warp, including the girder steel, the surface course of mating formation, the basic unit and the loading board of mating formation, the girder steel is higher than the roof beam height in the positive moment district by 10~40cm in the roof beam height in the hogging moment district, and the basic unit of mating formation is located the loading board upside, and the last pterygoid lamina of girder steel inlays to bury in the basic unit of mating formation or between the basic unit of mating formation and the surface course of mating formation, pterygoid lamina upside and downside are equipped with local reinforcing net on pterygoid lamina upside or the girder steel on the girder steel, local reinforcing net with the surface course of mating formation or the basic unit of mating formation are in the same place. The utility model discloses bridge floor structural rigidity is less, makes its deformability better under the load effect, and this bridge floor structure has weakened simultaneously with being connected of girder steel upper wing board, makes it bear littleer negative bending district tensile stress, and this makes it can adapt to the big characteristic of combination beam bridge negative bending moment district deformation well.

Description

Bridge deck structure suitable for deformation in hogging moment area of steel-concrete composite beam bridge

Technical Field

The utility model relates to a steel-concrete composite beam bridge hogging moment district bridge floor structure that adaptation warp belongs to civil engineering technical field.

Background

The reinforced concrete composite beam structure is reasonable and economical in material utilization, high in construction speed and strong in practicability, and is widely applied to the fields of roads, bridges and buildings. However, the concrete in the hogging moment region of the composite structural continuous beam is prone to crack in tension, resulting in poor durability of the composite beam. To solve this problem, there are currently mainly the following methods: firstly, changing the construction sequence, and constructing a bridge deck after the steel beam in the hogging moment area is fully tensioned to reduce the tensile stress of the bridge deck; secondly, increasing the reinforcement ratio of the bridge deck structure or controlling the number and the width of cracks by using high-performance concrete; and thirdly, improving the construction process, and reducing or avoiding the tensile stress of the concrete slab by adopting methods such as prestress application and the like. However, by changing the construction sequence, the concrete bridge deck still bears most of the adverse effects of long-term load after the bridge; when the method such as reinforcing bar addition and the like is used independently, the crack is generated for a long time, and the durability is adversely affected; the method of applying the pre-stress and the like inevitably applies additional stress to the shear connection member, which not only increases the burden of the steel beam, but also weakens the effect of the pre-stress applied to the concrete slab.

A layered pavement structure composed of plastic materials such as asphalt and granular mixture is commonly used for high-grade pavements in road construction, the layered pavement structure is a flexible pavement structure, the structural rigidity is small, the driving load is resisted mainly by the compressive strength and the shear strength, and the vehicle load is transmitted to a soil foundation through each structural layer, so that the soil foundation bears larger unit pressure. In view of the stress characteristic of the flexible pavement structure, the flexible pavement structure has the application possibility in large-deformation bridge deck structures.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a steel-concrete composite beam bridge hogging moment district bridge floor structure that the structural rigidity is less, and deformability is better adaptation warp under the load effect.

The utility model discloses a following scheme realizes: the utility model provides a steel-concrete composite beam bridge hogging moment district bridge floor structure that adaptation warp, includes the girder steel, paves the surface course, paves basic unit and loading board, the girder steel upwards exceeds 10~40cm at the beam height in hogging moment district than the beam height in positive bending moment district, paves the basic unit and is located the loading board upside, and the last aerofoil of girder steel inlays to bury in the basic unit of paving or paves between basic unit and the surface course of paving.

Further, the bearing plate is made of reinforced concrete plates.

Furthermore, a round hole for a transverse steel bar on the reinforced concrete slab to pass through is formed in the web plate of the steel beam, and the diameter of the round hole is 2 times larger than that of the transverse steel bar on the reinforced concrete slab.

Furthermore, the bearing plate is made of profiled steel plates, and the profiled steel plates are connected to a web plate of the steel beam through welding or bolts.

Furthermore, a layer of lower edge concrete slab is paved on the upper side of the lower wing plate of the steel beam.

Further, the pavement surface layer is divided into a surface layer and a lower surface layer, a modified asphalt waterproof layer is arranged between the surface layer and the lower surface layer, the surface layer is fine-grain asphalt concrete or medium-grain asphalt concrete, and the lower surface layer is medium-grain asphalt concrete; the paving base layer is an asphalt stabilized gravel layer or an asphalt stabilized macadam and a graded gravel layer.

Furthermore, the pterygoid lamina upside is equipped with local reinforcing mat with girder steel upper wing plate upside or girder steel upper wing plate upside and downside, local reinforcing mat with the surface course of mating formation or the basic unit of mating formation combine together.

Furthermore, local reinforcing mesh is wire net or fiber glass net, and local reinforcing mesh both sides are stretched out and the width that stretches out by girder steel upper wing board both sides is not less than 20 cm.

Furthermore, viscous layer oil is sprayed between the pavement surface layer and the pavement base layer and between the pavement base layer and the bearing plate to serve as bonding layers.

Compared with the prior art, the utility model discloses following beneficial effect has: the bridge deck structure has smaller rigidity, so that the deformation capacity of the bridge deck structure is better under the load action, and simultaneously, the bridge deck structure weakens the connection with an upper wing plate of a steel beam, so that the bridge deck structure bears smaller tensile stress of a negative bending area, and the bridge deck structure can well adapt to the characteristic of large deformation of the negative bending area of a combined beam bridge; the asphalt mixture and the granular materials are used as the intermediate layer, and the asphalt mixture has the characteristics of high strength and good stability.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to specific embodiments and related drawings.

Drawings

FIG. 1 is a longitudinal cross-sectional view of a bridge deck structure of a steel-concrete composite beam bridge according to an embodiment of the present invention;

FIG. 2 is a schematic view of a hogging moment area bridge deck structure according to an embodiment of the present invention;

FIG. 3 is a schematic view of a bridge deck structure according to the second embodiment of the present invention;

FIG. 4 is a schematic view of a bridge deck structure according to a third embodiment of the present invention;

the reference numbers in the figures illustrate: 1-bearing plate, 2-paving base layer, 3-lower surface layer, 4-surface layer, 5-steel beam, 6-modified asphalt waterproof layer, 7-local reinforcing net and 8-lower edge concrete plate.

Detailed Description

The first embodiment is as follows: as shown in fig. 1-2, a bridge deck structure suitable for a negative bending moment region of a deformed steel-concrete composite beam bridge comprises a steel beam 5, a pavement surface layer, a pavement base layer 2 and a bearing plate 1, wherein the section of the steel beam is in an i shape, the beam height of the steel beam in the negative bending moment region is 10-40 cm higher than that of the steel beam in the positive bending moment region, namely, the steel beam in the bridge deck structure in the negative bending moment region is heightened upwards, namely, the height H in fig. 1, the pavement base layer is positioned on the upper side of the bearing plate, a web plate of the steel beam penetrates through the bearing plate, and an upper wing plate of the steel beam is embedded in the pavement base layer or between the pavement base layer and the pavement surface layer; the pavement surface layer, the pavement base layer 2 and the bearing plate 1 are sequentially arranged from top to bottom; the utility model discloses bridge floor structural rigidity is less, makes its deformability better under the load effect, and this bridge floor structure has weakened simultaneously with being connected of girder steel upper wing board, makes it bear littleer negative bending district tensile stress, and this makes it can adapt to the big characteristic of combination beam bridge negative bending moment district deformation well.

In this embodiment, the loading plate 1 is made of reinforced concrete.

In this embodiment, the steel beam 5 is not provided with a shear connector, a web plate of the steel beam 5 is provided with a circular hole for a transverse steel bar on a reinforced concrete slab to pass through, and the diameter of the circular hole is 2 times larger than that of the transverse steel bar on the reinforced concrete slab.

In this embodiment, the pavement surface layer is divided into a surface layer 4 and a lower surface layer 3, a modified asphalt waterproof layer 6 is arranged between the surface layer and the lower surface layer, the surface layer 4 is fine-grain asphalt concrete or medium-grain asphalt concrete, and the lower surface layer 3 is medium-grain asphalt concrete; the paving base layer 2 is an asphalt stable gravel layer or an asphalt stable gravel and graded gravel layer, and during construction, after sand blasting rust removal and corrosion prevention treatment are carried out on the steel beam upper wing plate, an adhesive is sprayed, premixed gravel is spread on the steel beam upper wing plate, and then asphalt concrete above the steel beam upper wing plate is paved; the asphalt mixture and the granular materials are used as the intermediate layer, and the asphalt mixture has the characteristics of high strength and good stability.

In this embodiment, a local reinforcing net 7 is arranged on the upper side of the upper wing plate of the steel beam 5 or on the upper side and the lower side of the upper wing plate of the steel beam, and the local reinforcing net 7 is combined with the pavement surface layer or the pavement base layer; the cooperative stress among the layers is uniform, the deformability is high, the method is particularly suitable for large deformation areas of the hogging moment areas of the steel-concrete composite beam bridge, and the defects of cracking and the like caused by tension existing in a concrete bridge deck structure are avoided.

In this embodiment, the local reinforcing mesh 7 is a steel wire mesh or a fiberglass mesh, and two sides of the local reinforcing mesh 7 extend from two sides of the steel beam 5 and the extending width is not less than 20 cm.

In this embodiment, the paving surface layer and the paving base layer, and the paving base layer and the bearing plate are sprayed with viscous layer oil as the bonding layer.

Example two: as shown in fig. 3, the difference between this embodiment and the first embodiment is the structure of the bearing plate, in this embodiment, the bearing plate 1 is made of profiled steel plate, and the profiled steel plate is connected to the web of the steel beam 5 by welding or bolting.

Example three: as shown in fig. 4, the difference between the present embodiment and the second embodiment is that a layer of lower edge concrete slab 8 is laid on the upper side of the lower wing plate of the steel beam 5.

Any technical solution disclosed in the present invention is, unless otherwise stated, disclosed a numerical range if it is disclosed, and the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Because numerical value is more, can't be exhaustive, so the utility model discloses just disclose some numerical values with the illustration the technical scheme of the utility model to, the numerical value that the aforesaid was enumerated should not constitute right the utility model discloses create the restriction of protection scope.

The utility model discloses if disclose or related to mutual fixed connection's spare part or structure, then, except that other the note, fixed connection can understand: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).

In addition, the terms used in any aspect of the present disclosure as described above to indicate positional relationships or shapes include similar, analogous, or approximate states or shapes unless otherwise stated.

The utility model provides an arbitrary part both can be assembled by a plurality of solitary component parts and form, also can be the solitary part that the integrated into one piece technology was made.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.

Claims

1. The utility model provides a steel-concrete composite beam bridge hogging moment district bridge floor structure that adaptation warp which characterized in that: including girder steel, the surface course of mating formation, the basic unit and the loading board of mating formation, the girder steel is higher than the roof beam height in the positive bending moment district by 10~40cm in the roof beam height ratio in the negative bending moment district, and the basic unit of mating formation is located the loading board upside, and the last wing plate of girder steel inlays in the basic unit of mating formation or between basic unit and the surface course of mating formation.

2. The bridge deck structure adapted to the hogging moment area of the deformed steel-concrete composite beam bridge according to claim 1, wherein: the bearing plate is made of reinforced concrete plates.

3. The bridge deck structure adapted to the hogging moment area of the deformed steel-concrete composite beam bridge according to claim 2, wherein: and a web plate of the steel beam is provided with a round hole for a transverse steel bar on the reinforced concrete slab to pass through, and the diameter of the round hole is 2 times larger than that of the transverse steel bar on the reinforced concrete slab.

4. The bridge deck structure adapted to the hogging moment area of the deformed steel-concrete composite beam bridge according to claim 1, wherein: the bearing plate is made of profiled steel plates, and the profiled steel plates are connected to a web plate of the steel beam through welding or bolts.

5. The deformation-adaptive steel-concrete composite beam bridge hogging moment area bridge deck structure of claim 4, wherein the bridge deck structure comprises: and a layer of lower edge concrete slab is paved on the upper side of the lower wing plate of the steel beam.

6. The bridge deck structure adapted to the hogging moment area of the deformed steel-concrete composite beam bridge according to claim 1, wherein: the pavement surface layer is divided into a surface layer and a lower surface layer, a modified asphalt waterproof layer is arranged between the surface layer and the lower surface layer, the surface layer is fine grain asphalt concrete or medium grain asphalt concrete, and the lower surface layer is medium grain asphalt concrete; the paving base layer is an asphalt stabilized gravel layer or an asphalt stabilized macadam and a graded gravel layer.

7. The bridge deck structure adapted to the hogging moment area of the deformed steel-concrete composite beam bridge according to claim 2, wherein: local reinforcing nets are arranged on the upper side of the steel beam upper wing plate or the upper side and the lower side of the steel beam upper wing plate, and the local reinforcing nets are combined with the pavement surface layer or the pavement base layer.

8. The deformation-adaptive steel-concrete composite beam bridge hogging moment area bridge deck structure of claim 7, wherein the bridge deck structure comprises: the local reinforcing net is a steel wire net or a fiber glass net, and the two sides of the local reinforcing net extend out of the two sides of the steel beam upper wing plates and the extending width is not less than 20 cm.

9. The deformation-adaptive steel-concrete composite beam bridge hogging moment area bridge deck structure of claim 7, wherein the bridge deck structure comprises: and sticky layer oil is sprayed between the pavement surface layer and the pavement base layer and between the pavement base layer and the bearing plate to serve as a bonding layer.