Novel combined bridge deck

Abstract

The utility model discloses a novel combined bridge deck, which comprises a steel beam and a concrete panel arranged above the steel beam, the steel beam comprises a top plate, a web plate and a bottom plate, a plurality of shear nails are welded on the top plate, and the shear nails are arranged at non-uniform intervals in the transverse bridge direction. The distance between the shear nails far away from the web plate in the transverse bridge direction is larger than the distance between the shear nails close to the web plate in the transverse bridge direction, no shear nails are arranged over the web plate, all the shear nails are arranged in mirror symmetry about the plane where the web plate is located in the transverse bridge direction, and the shear nails are connected with the top plate and the concrete panel. According to the utility model, the stress performance of the combined bridge deck can be improved, and the safety reserve of the whole combined bridge deck is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridges, and particularly relates to a novel composite bridge deck. Background Art

[0002] Steel-concrete composite structure bridges are an important branch in current bridge engineering. Whether it is a super-large-span bridge spanning deep and wide straits or various small and medium-span bridges solving urban traffic problems, composite structure bridges have huge application space. Since the composite structure technology can give full play to the respective advantages of different materials or systems, it has become an important research direction in the current bridge innovation system.

[0003] For medium and small-span composite girder bridges, in order to reduce the manufacturing and installation costs, I-shaped cross-section steel girders are usually used. The steel girder is composed of a top plate, a web plate and a bottom plate. Such a composite structure is also called a composite slab girder bridge. In the existing such composite slab girder bridges, the shear force bearing of the composite structure is not scientific, and the safety reserve of the structure is relatively low. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a novel composite bridge deck, by changing the arrangement form of shear studs in the transverse direction of the bridge, making the shear studs connecting the steel girder and the concrete top plate more evenly and reasonably stressed, improving the mechanical properties of the composite bridge deck, and increasing the safety reserve of the whole composite bridge deck.

[0005] The purpose of the utility model can be realized by the following technical solutions.

[0006] A novel composite bridge deck, including a steel girder and a concrete panel arranged above the steel girder. The steel girder includes a top plate, a web plate and a bottom plate. A plurality of shear studs are welded on the top plate. The spacing of the shear studs in the transverse direction of the bridge is non-uniformly arranged, so that the spacing of the shear studs far from the web plate in the transverse direction of the bridge > the spacing of the shear studs near the web plate in the transverse direction of the bridge, and no shear stud is arranged directly above the web plate. Each shear stud is arranged symmetrically about the plane where the web plate is located in the transverse direction of the bridge. The shear studs connect the top plate and the concrete panel.

[0007] The arrangement method of the shear studs of the utility model is more in line with the force transmission form of the shear flow in the concrete panel, can improve the stress distribution in the concrete panel, make the shear studs more evenly stressed, prevent cracks from occurring in the composite bridge deck, and extend the service life of the composite bridge deck.

[0008] The utility model also has the following preferred designs:

[0009] In a feasible implementation manner of the utility model, the spacing of the shear studs far from the web plate in the transverse direction of the bridge is twice the spacing of the shear studs near the web plate.

[0010] The steel beam of the present utility model is a box girder or an I-beam, and the steel beam includes a top plate, a web plate, and a bottom plate.

[0011] The steel beam of the present utility model is a rolled steel beam or a welded steel beam. The spacing of the rolled steel beams generally ranges from 2 to 4 m, and the height-span ratio of the simply supported composite slab beam bridge generally ranges from 1 / 25 to 1 / 18; the welded steel beams generally have a larger spacing.

[0012] The present utility model has the following beneficial effects:

[0013] 1. In the transverse arrangement of the shear studs in the composite bridge deck structure of the present utility model, a non-uniform arrangement method across the full width of the bridge deck is adopted, that is, a smaller spacing of shear studs is used on both sides of the web plate near the transverse direction of the bridge, and the spacing of the shear studs increases when away from the web plate. The arranged shear studs are more in line with the mechanical mechanism, making the stress of the shear studs more uniform, improving the stress distribution in the concrete slab, preventing cracks from occurring in the composite bridge deck, and extending the service life of the composite bridge deck.

[0014] 2. The shear studs of the present utility model are welded at the top plate of the steel beam, and can be processed in the workshop, which is convenient for large-scale production and popularization. Description of the Drawings

[0015] Figure 1 is the cross-sectional view of the composite bridge deck using the box girder of the present utility model;

[0016] Figure 2 is the cross-sectional view of the composite bridge deck with uniform arrangement of shear studs in the comparative example;

[0017] Figure 3 is Figure 1 the stress diagram of the shear studs obtained by Abaqus modeling analysis of the composite bridge deck of

[0018] Figure 4 is the comparison diagram of the longitudinal shear calculation results between the present utility model and the comparative example;

[0019] Figure 5 is the cross-sectional view of the composite bridge deck using the I-beam of the present utility model;

[0020] Description of the Reference Numerals: 1 - steel beam, 2 - concrete slab, 3 - top plate, 4 - web plate, 5 - bottom plate, 6 - shear stud. Detailed Embodiments

[0021] The following combines the drawings and embodiments to detail the technical solutions of the present utility model, so that those of ordinary skill in the art can better understand and implement the technical solutions of the present utility model.

[0022] Embodiment

[0023] As Figure 1As shown in the figure, a new type of composite bridge deck includes a steel beam 1 and a concrete slab 2 arranged above the steel beam 1. The steel beam 1 includes a top plate 3, a web 4, and a bottom plate 5. A number of shear studs 6 are welded on the top plate 3. The spacing of the shear studs 6 in the transverse direction of the bridge is non-uniformly arranged, such that the spacing of the shear studs 6 farther away from the web 4 in the transverse direction of the bridge is > the spacing of the shear studs 6 near the web 4 in the transverse direction of the bridge, and no shear studs 6 are provided directly above the web 4. Each shear stud 6 is arranged symmetrically about the plane of the web 4 in the transverse direction, and the shear stud 6 connects the top plate 3 and the concrete slab 2.

[0024] As a preferred embodiment:

[0025] The spacing of the shear studs 6 farther away from the web 4 in the transverse direction of the bridge is twice the spacing of the shear studs 6 near the web 4. Figure 1 Among them, near the web 4, the spacing of the shear studs 6 is 100 mm. In the area far away from the web 4, the spacing of the shear studs 6 is 200 mm. The steel beam 1 is a box girder. The total length of the box girder is 11 m, and the width is 5.25 m. The top plate 3 is arranged with 2 + 7 + 14 + 7 + 2 shear studs in the transverse direction of the bridge, and the corresponding arrangement spacing is recorded as 2×200 + 7×100 + 14×200 + 7×100 + 2×200. Using Abaqus to analyze the stress, at the center position of the top plate of the entire box girder, a uniform pressure with a magnitude of 1 MPa is applied in the area of 500 mm×500 mm. The boundary condition of the box girder is simply supported. At the cross-section The stress on each shear stud 6 at the cross-section is as Figure 3 shown.

[0026] Comparative example:

[0027] The difference between this comparative example and the first embodiment lies in the arrangement method of the shear studs. As shown in this comparative example Figure 2 the shear studs are uniformly arranged on the top plate, and the arrangement spacing is 150 mm. Using Abaqus to analyze the stress, at the center position of the top plate of the entire box girder, a uniform pressure with a magnitude of 1 MPa is applied in the area of 500 mm×500 mm. The boundary condition of the box girder is simply supported. At the cross-section The calculation result of the longitudinal shear force of the shear studs when they are uniformly arranged at the cross-section is compared with the calculation result of the longitudinal shear force of the non-uniformly arranged shear studs. The result is as Figure 4 shown.

[0028] By comparing the calculation results of the stress on the shear studs in the first embodiment and the comparative example, it can be concluded that when the shear studs are uniformly arranged, the longitudinal shear force on the shear studs on both sides of the web is relatively large. When the shear studs on both sides of the web are encrypted and non-uniformly arranged, the stress on the shear studs beside the web is reduced by 30%, and the overall stress on the shear studs is more uniform.

[0029] In other embodiments, the steel beam can be as Figure 5The shown I-beam also includes a top plate, a web plate and a bottom plate.

[0030] The steel beam is a rolled steel beam or a welded steel beam. The spacing of the rolled steel beams generally ranges from 2 to 4 m, and the height-span ratio of the simply supported composite slab beam bridge generally ranges from 1 / 25 to 1 / 18; the welded steel beams generally have a larger spacing.

[0031] The above embodiments are only the preferred embodiments of the present invention, but they cannot be used as a limitation to the invention. Any variations and improvements made based on the concept of the present invention should fall within the protection scope of the present invention, and the specific protection scope shall be subject to the description in the claims.

Claims

1. A novel composite bridge deck, comprising a steel beam and a concrete slab arranged above the steel beam, characterized in that: The steel girder includes a top plate, a web plate and a bottom plate. A number of shear studs are welded on the top plate. The spacing of the shear studs in the transverse bridge direction is non-uniformly arranged, such that the spacing of the shear studs far from the web plate in the transverse bridge direction > the spacing of the shear studs near the web plate in the transverse bridge direction. And no shear stud is provided directly above the web plate. Each shear stud is arranged symmetrically about the plane where the web plate is located in the transverse bridge direction. The shear studs connect the top plate and the concrete panel.

2. The novel combined bridge deck according to claim 1, characterized in that: The spacing of the shear studs far from the web plate in the transverse bridge direction is twice the spacing of the shear studs near the web plate.

3. The novel combined bridge deck according to claim 1 or 2, characterized in that: The steel girder is a box girder.

4. The novel combined bridge deck according to claim 3, characterized in that: The steel girder is a rolled steel girder or a welded steel girder.

5. The novel combined bridge deck according to claim 1 or 2, characterized in that: The steel girder is an I-beam.

6. The novel combined bridge deck according to claim 5, characterized in that, The steel girder is a rolled steel girder or a welded steel girder.

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