Transverse steel cross beam structure for preventing transverse cracking of combined bridge deck slab
By introducing shear nails and solid-belt cross beams into the steel-concrete composite beam structure, the anti-slip and coordinated deformation capabilities of the bridge deck concrete and steel plate are enhanced, and the problem of transverse cracking of the bridge deck is solved, and the stability and resistance of the structure are achieved. Improved crack performance.
Patent Information
- Application Number
- CN202420877689.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-25
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-04-25
AI Technical Summary
After the existing steel-concrete composite beam structure is used for a long time, the concrete slabs of the bridge deck are prone to horizontal cracking, and there is a lack of effective preventive measures.
A transverse steel cross beam structure including a combination of bridge deck panels, steel box girders, solid belly cross beams and shear nails was designed. By setting shear nails on the bottom steel plate and solid belly cross beams between the steel box girders, the Anti-slip and coordinated deformation capability between the bridge deck concrete and steel plate.
It effectively prevents lateral cracking of the bridge deck concrete slabs, and improves the stability and crack resistance of the bridge deck structure.
Smart Images
Figure CN222205997U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of steel box beams, in particular to a transverse steel beam structure for preventing transverse cracking of a composite bridge deck. Background Art
[0002] Steel-concrete composite beams are load-bearing components that are composed of a steel beam and a concrete bridge deck. This structural form makes full use of the compressive properties of concrete materials and the tensile properties of steel. It is one of the mainstream bridge types in the domestic and international highway and municipal bridge markets.
[0003] The existing steel-concrete composite beam structure is very prone to transverse cracking of the bridge deck concrete slab after long-term use.
[0004] Therefore, it is necessary to propose a transverse steel beam structure for preventing transverse cracking of composite bridge decks, which can prevent transverse cracking of composite bridge deck concrete slabs. Utility Model Content
[0005] The utility model aims to overcome the deficiencies of the prior art and proposes a transverse steel beam structure for preventing transverse cracking of a composite bridge deck, which can prevent transverse cracking of a composite bridge deck concrete slab.
[0006] The purpose of the utility model is achieved through the following technical solutions: a transverse steel beam structure for preventing transverse cracking of a composite bridge deck, comprising a composite bridge deck, a plurality of steel box girders are arranged below the composite bridge deck, a solid-web cross beam is arranged between every two of the steel box girders, the composite bridge deck comprises a bottom steel plate and a concrete slab arranged on the bottom steel plate, and a plurality of shear nails are arranged on the bottom steel plate.
[0007] The thickness of the concrete slab at the end support beam of the composite bridge deck is 400 mm.
[0008] At the middle support beam of the composite bridge deck, the thickness of the concrete slab is 260 mm, and the thickness of the concrete slab above the steel box beam is 400 mm.
[0009] The shear nails are round head welded nails made of ML15AL. The specifications above the steel box girder are medium 22x200 mm, the longitudinal spacing is 200~350mm, and the transverse spacing is 125mm. The specifications above the bottom steel plate are medium 16x150 mm, the longitudinal spacing is 200~350mm, and the transverse spacing is 250mm.
[0010] The solid-web cross beam is arranged along the longitudinal bridge direction, and the distance between two adjacent solid-web cross beams is 5m.
[0011] Crossbeam connecting plates are connected to both sides of the solid-web crossbeam, and the crossbeam connecting plates are connected to the steel box beam.
[0012] A support plate for supporting the composite bridge deck is arranged on the outer side surface of the steel box beam at the end support beam of the composite bridge deck, and the support plate is a trapezoidal structure.
[0013] Anti-collision piers are arranged on both sides of the combined bridge deck.
[0014] The concrete slab is cast by C50 ultra-high performance shrinkage compensating concrete.
[0015] The beneficial effect of the utility model is that by arranging shear nails on the bottom steel plate and arranging a solid-web crossbeam between two steel box girders, the anti-slip ability and coordinated deformation ability between the bridge deck concrete and the steel plate are improved, thereby preventing the bridge deck concrete from cracking. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a cross-sectional view of the cross beam at the fulcrum of the utility model;
[0017] Figure 2 This is a cross-sectional view of the end support beam of the utility model;
[0018] In the figure, 1-combined bridge deck, 11-bottom steel plate, 12-concrete slab, 13-shear studs, 14-crash piers, 2-steel box girder, 21-support plate, 3-solid web cross beam, 31-cross beam connecting plate. DETAILED DESCRIPTION
[0019] The following will be combined with the embodiments to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.
[0020] It is to be noted that the concepts of directions “left”, “right”, “up”, “down”, “front”, “back”, “inside” and “outside” in the following schemes are all relative directions and will not be listed one by one here.
[0021] A transverse steel beam structure for preventing transverse cracking of composite bridge decks, reference Figure 1 and Figure 2 , comprising a composite bridge deck 1. A plurality of steel box girders 2 are arranged below the composite bridge deck 1. A solid cross beam 3 is arranged between every two steel box girders 2. Cross beam connecting plates 31 are arranged on both sides of the solid cross beam 3. The cross beam connecting plates 31 are connected to the steel box girders 2. Crash piers 14 are arranged on both sides of the composite bridge deck 1.
[0022] The composite bridge deck 1 is composed of a bottom steel plate 11 and a concrete plate 12 arranged on the bottom steel plate 11. A plurality of shear nails 13 are arranged on the bottom steel plate 11. The concrete plate 12 is cast by C50 ultra-high performance shrinkage compensating concrete. A support plate 21 of a trapezoidal structure is arranged on the outer side of the steel box girder 2 at the end support beam of the composite bridge deck 1. The support plate 21 is used to support the composite bridge deck 1.
[0023] The thickness of the concrete slab 12 at the end support beam of the composite bridge deck 1 is 400 mm.
[0024] At the middle support beam of the composite bridge deck 1, the thickness of the concrete slab 12 is 260 mm, and the thickness of the concrete slab 12 above the steel box girder 2 is 400 mm.
[0025] The shear studs 13 are round head welded studs made of ML15AL. The specifications on the upper side of the steel box girder 2 are medium 22x200 mm, with a longitudinal spacing of 200~350 mm and a transverse spacing of 125 mm. The specifications on the upper side of the bottom steel plate 11 are medium 16x150 mm, with a longitudinal spacing of 200~350 mm and a transverse spacing of 250 mm.
[0026] The solid-web cross beam 3 is arranged along the longitudinal bridge direction, and the distance between two adjacent solid-web cross beams 3 is 5m.
[0027] By arranging shear nails 13 on the bottom steel plate 11 and arranging a solid cross beam 3 between the two steel box girders 2, the anti-slip ability and coordinated deformation ability between the concrete plate 12 and the bottom steel plate 11 are improved, thereby preventing the bridge deck concrete from cracking.
[0028] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above description or the technology or knowledge in the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.
Claims
1. A transverse steel beam structure for preventing transverse cracking of a composite bridge deck, comprising a composite bridge deck (1), characterized in that: A plurality of steel box girders (2) are arranged below the composite bridge deck (1), a solid-web cross beam (3) is arranged between every two of the steel box girders (2), the composite bridge deck (1) comprises a bottom steel plate (11) and a concrete plate (12) arranged on the bottom steel plate (11), and a plurality of shear studs (13) are arranged on the bottom steel plate (11).
2. A transverse steel beam structure for preventing transverse cracking of a composite bridge deck according to claim 1, characterized in that: The thickness of the concrete slab (12) at the end support beam of the composite bridge deck (1) is 400 mm.
3. A transverse steel beam structure for preventing transverse cracking of a composite bridge deck according to claim 1, characterized in that: At the middle support beam of the composite bridge deck (1), the thickness of the concrete slab (12) is 260 mm, and the thickness of the concrete slab (12) above the steel box girder (2) is 400 mm.
4. A transverse steel beam structure for preventing transverse cracking of a composite bridge deck according to claim 1, characterized in that: The shear studs (13) are round-headed welded studs made of ML15AL. The specifications of the upper portion of the steel box girder (2) are 22 mm x 200 mm, with a longitudinal spacing of 200-350 mm and a transverse spacing of 125 mm. The specifications of the upper portion of the bottom steel plate (11) are 16 mm x 150 mm, with a longitudinal spacing of 200-350 mm and a transverse spacing of 250 mm.
5. The transverse steel beam structure for preventing transverse cracking of a composite bridge deck according to claim 1, characterized in that: The solid-web cross beam (3) is arranged along the longitudinal bridge direction, and the distance between two adjacent solid-web cross beams (3) is 5m.
6. A transverse steel beam structure for preventing transverse cracking of a composite bridge deck according to claim 1, characterized in that: Crossbeam connecting plates (31) are provided on both sides of the solid-web crossbeam (3), and the crossbeam connecting plates (31) are connected to the steel box beam (2).
7. A transverse steel beam structure for preventing transverse cracking of a composite bridge deck according to claim 1, characterized in that: A support plate (21) for supporting the combined bridge deck (1) is provided on the outer side surface of the steel box beam (2) at the end support beam of the combined bridge deck (1); the support plate (21) is a trapezoidal structure.
8. The transverse steel beam structure for preventing transverse cracking of a composite bridge deck according to claim 1, characterized in that: Crash piers (14) are provided on both sides of the combined bridge deck (1).
9. A transverse steel beam structure for preventing transverse cracking of a composite bridge deck according to claim 1, characterized in that: The concrete slab (12) is cast from C50 ultra-high performance shrinkage compensating concrete.