Open rib orthotropic steel bridge deck

Abstract

The utility model discloses an open rib orthotropic steel bridge deck which comprises a steel bridge deck body, a plurality of flat-bulb steel stiffening ribs, a plurality of rib inner partition plates and a transverse partition plate, and the flat-bulb steel stiffening ribs are open ribs, are inclined to the steel bridge deck body, are arranged in an axial symmetry mode and are clamped between the steel bridge deck body and the transverse partition plate. U-shaped cutting grooves are evenly formed in the transverse partition plate, and the flat-bulb steel stiffening ribs are connected with the transverse partition plate through the U-shaped cutting grooves. The rib inner partition plates are arranged in the flat-bulb steel stiffening ribs and correspond to the flat-bulb steel stiffening ribs one to one. When the flat-bulb steel stiffening rib is connected with the transverse partition plate through the U-shaped cutting groove, the rib inner partition plate is connected with the U-shaped cutting groove. The axisymmetric flat-bulb steel plate ribs are arranged as the open ribs, so that compared with conventional closed ribs, the local torsion degree is reduced, the potential damage risk caused by stress concentration is reduced, and the safety and durability are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge structures, and in particular relates to an open rib orthotropic steel bridge deck. Background Art

[0002] Orthotropic steel bridge deck is a structure composed of longitudinal and transverse perpendicular stiffening ribs (longitudinal ribs and transverse ribs) and steel bridge deck to bear wheel loads. This structure has structural anisotropy due to the difference in stiffness in two perpendicular directions. As an important landmark innovation in modern bridge engineering, orthotropic steel bridge deck has outstanding advantages such as light weight, high bearing capacity and wide applicability. With the rapid development of steel bridges in my country, orthotropic steel bridge deck has been widely used in various types of bridges such as highways, railways, cities and municipalities in my country due to its unique structural characteristics and superior mechanical properties. Among them, U-shaped ribs, as an important component of orthotropic steel bridge decks, have an important impact on the overall performance and service life of bridges due to their design rationality and performance stability.

[0003] However, the traditional orthotropic bridge deck still has some structural deficiencies due to the U-rib plate, and there is still room for improvement in safety issues. Utility Model Content

[0004] In view of the above problems, it is necessary to provide a safe, reliable and durable open rib orthotropic steel bridge deck.

[0005] An open rib orthotropic steel bridge deck comprises: a steel bridge deck, a plurality of bulb flat steel stiffening ribs, a plurality of rib inner diaphragms, and a transverse diaphragm, wherein:

[0006] Several of the flat bulb steel stiffening ribs are open ribs, each of the flat bulb steel stiffening ribs is inclined with respect to the steel bridge deck and is arranged axially symmetrically, and is sandwiched between the steel bridge deck and the transverse diaphragm; several of the flat bulb steel stiffening ribs are arranged along the transverse bridge direction;

[0007] The diaphragm is evenly provided with U-shaped grooves, and the flat bulb steel stiffening rib is connected to the diaphragm through the U-shaped grooves; and the diaphragm is arranged along the longitudinal bridge direction;

[0008] The inner rib baffles are arranged inside the bulb flat steel stiffening ribs and correspond to the bulb flat steel stiffening ribs one by one; and a plurality of the inner rib baffles are evenly arranged along the longitudinal rib direction;

[0009] When the bulb flat steel stiffening rib is connected to the transverse partition through the U-shaped groove, the rib inner partition is connected to the U-shaped groove.

[0010] In one of the embodiments, the bulb flat steel stiffening rib includes a first longitudinal rib surface connected to the steel bridge deck, and a second longitudinal rib surface connected to the bottom of the first longitudinal rib surface; the first longitudinal rib surface and the second longitudinal rib surface of the two bulb flat steel stiffening ribs are symmetrically arranged at intervals.

[0011] In one of the embodiments, the first longitudinal rib surface is connected to the steel bridge deck by welding.

[0012] In one embodiment, the bottoms of the first longitudinal rib surfaces of the two bulb flat steel stiffening ribs are inclined toward each other in an inverted eight-shaped shape, and the second longitudinal rib surfaces of the two bulb flat steel stiffening ribs are both arranged horizontally.

[0013] In one of the embodiments, U-shaped reinforcing wing plates are provided at the U-shaped groove positions of the transverse partition.

[0014] The above-mentioned open rib orthotropic steel bridge deck is provided with axisymmetric bulb flat steel stiffening ribs. The axisymmetric bulb flat steel stiffening ribs are open ribs. Compared with conventional closed ribs, the local torsion is reduced, and the bulb flat steel stiffening ribs are inclined and axisymmetric with the diaphragm, thereby avoiding the problem of excessive stress concentration, helping to extend the service life of the bridge deck, reducing the potential risk of damage caused by stress concentration, and improving durability. Since the axisymmetric bulb flat steel stiffening ribs are open ribs, during the operation of the bridge deck, it is convenient to inspect and repair the inner welds between the axisymmetric bulb flat steel stiffening ribs and the steel bridge deck, thereby improving the safety and maintainability of the bridge and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a structural diagram of an open rib orthotropic steel bridge deck in one embodiment;

[0016] Figure 2 is a structural diagram of an open rib orthotropic steel bridge deck in one embodiment;

[0017] Figure 3 for Figure 1 The schematic diagram of the structure of the steel bridge deck 100, a number of bulb flat steel stiffening ribs 200 and the rib inner partition 300 in the structure shown;

[0018] Figure 4 is a partial schematic diagram of a diaphragm 400 in one embodiment;

[0019] Figure 5 is a schematic structural diagram of a U-shaped reinforcing wing plate 420 in one embodiment;

[0020] Figure 6 Schematic diagram of welding between the reinforcing plate and the U-shaped groove of the diaphragm in one embodiment. DETAILED DESCRIPTION

[0021] In order to better understand the present invention, the contents of the present invention are further explained below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited to the following embodiments.

[0022] In one embodiment, Figure 1 , Figure 2 As shown, the utility model provides an open rib orthotropic steel bridge deck, which mainly includes: a steel bridge deck 100, a plurality of bulb flat steel stiffening ribs 200, a plurality of rib inner partitions 300, and a transverse partition 400, wherein: a plurality of the bulb flat steel stiffening ribs 200 are open ribs, each of the bulb flat steel stiffening ribs 200 is inclined with respect to the steel bridge deck 100 and is arranged in an axisymmetric manner, and is sandwiched between the steel bridge deck 100 and the transverse partition 400; a plurality of the bulb flat steel stiffening ribs 200 are arranged along the transverse direction of the bridge; the transverse partition 400 is evenly provided with A U-shaped groove 410, the flat steel stiffening rib 200 is connected to the diaphragm 400 through the U-shaped groove 410; and the diaphragm 400 is arranged along the longitudinal bridge direction; the rib inner baffle 300 is arranged inside the flat steel stiffening rib 200, and corresponds to the flat steel stiffening rib 200 one by one; and a plurality of the rib inner baffles 300 are evenly arranged along the longitudinal rib direction; when the flat steel stiffening rib 200 is connected to the diaphragm 400 through the U-shaped groove 410, the rib inner baffle 300 is connected to the U-shaped groove 410.

[0023] like Figure 2 As shown, in this embodiment, the bulb flat steel stiffening rib 200 is arranged orthogonally to the diaphragm 400, connected to the steel bridge deck 100 and the diaphragm 400, and a plurality of bulb flat steel stiffening ribs 200 are arranged along the transverse bridge direction. The bulb flat steel stiffening rib 200 is used to replace the traditional U rib, and the original closed U rib form is transformed into an open form. The bulb flat steel plate not only has a mature manufacturing process, but also has an increased cross-sectional area at the position of the flat ball head, which can effectively improve the deformation resistance of the open rib structure; at the same time, the bulb flat steel stiffening rib 200 can fully achieve full penetration welding with the steel bridge deck 100, avoiding structural hazards that may be caused by partial penetration of the weld.

[0024] Specifically, each of the bulb flat steel stiffening ribs 200 is inclined and axially symmetrical with the steel bridge deck 100, so as to better disperse the concentrated pressure on the steel bridge deck 100 and reduce the potential damage risk caused by stress concentration. In addition, considering the convenience of processing and manufacturing and the efficiency of monitoring and detection during the transportation of the bridge, in this embodiment, the bulb flat steel stiffening ribs 200 in the form of openings not only successfully eliminate the inspection blind spots that are difficult to reach in the original closed U-rib form, and improve the visualization of the manufacturing process, but also greatly facilitate the daily inspection work during the transportation of the bridge, and also provide convenience for subsequent maintenance work.

[0025] like Figure 1 As shown, by adding an inner rib partition 300 inside the bulb flat steel stiffening rib 200, the stress state of the steel bridge deck 100 when subjected to wheel load can be effectively improved, thereby improving the stability and durability of the overall structure; in addition, it is also possible to achieve an equal strength structure of the welds of the inner and outer rib partitions 400, thereby effectively reducing fatigue damage caused by uneven stress at weak welds.

[0026] like Figure 2 As shown, the diaphragm 400 is arranged orthogonally to the steel bridge deck 100, connected to the steel bridge deck 100 and a plurality of bulb flat steel stiffening ribs 200, arranged along the longitudinal direction of the bridge, and can play a supporting role.

[0027] In this embodiment, by providing the bulb flat steel stiffening rib 200, and the bulb flat steel stiffening rib 200 is an open rib, compared with the conventional closed rib, the local torsion is reduced, thereby avoiding the problem of excessive stress concentration, helping to extend the service life of the bridge deck, reducing the potential risk of damage caused by stress concentration, and improving safety and durability; since the bulb flat steel stiffening rib 200 is an open rib, during the operation of the bridge deck, it is convenient to inspect and repair the inner weld between the bulb flat steel stiffening rib 200 and the steel bridge deck 100, thereby improving the safety and maintainability of the bridge and reducing maintenance costs.

[0028] In this embodiment, by providing a steel bridge deck 100, a plurality of bulb-flat steel stiffening ribs 200, a plurality of rib inner partitions 300, and a cross partition 400, the structural design is reasonable, which can ensure that the steel bridge deck 100 has sufficient structural strength to withstand various expected loads and stresses; and improve the overall performance and reliability of the bridge, which has significant practical value and broad application prospects.

[0029] In one embodiment, Figure 3 As shown, the bulb flat steel stiffening rib 200 includes a first longitudinal rib surface 210 connected to the steel bridge deck 100, and a second longitudinal rib surface 220 connected to the bottom of the first longitudinal rib surface 210; the first longitudinal rib surface 210 and the second longitudinal rib surface 220 of the two bulb flat steel stiffening ribs 200 are symmetrically arranged at intervals.

[0030] Specifically, the bulb-flat steel stiffening rib 200 in this embodiment has unique properties and is significantly different from currently known structural forms such as T-shaped ribs, positive ball head ribs, offset ball head ribs, and L-shaped folded edge plate ribs.

[0031] In one embodiment, the first longitudinal rib surface is connected to the steel bridge deck by welding.

[0032] like Figure 3As shown, in one embodiment, the bottoms of the first longitudinal rib surfaces 210 of the two bulb flat steel stiffening ribs 200 are inclined toward each other in an inverted eight shape, and the second longitudinal rib surfaces 220 of the two bulb flat steel stiffening ribs 200 are both horizontally arranged.

[0033] In one embodiment, Figure 4 As shown, U-shaped reinforcing wing plates 420 are provided at the positions of the U-shaped grooves 410 of the transverse partition 400 .

[0034] Specifically, in this embodiment, the improved design of the diaphragm 400 is only carried out for the weak parts of the U-shaped cutout 410 of the diaphragm 400, that is, a U-shaped reinforcing wing plate 420 is added to the U-shaped cutout 410 of the diaphragm 400, and the U-shaped reinforcing wing plate 420 structure is used to constrain the deformation of the weak parts of the U-shaped cutout 410 of the diaphragm 400 under the action of external forces, thereby preventing the occurrence of stress concentration and fatigue damage. Figure 4 As shown, the U-shaped reinforcing wing plate 420 is arranged at the bottom of the U-shaped slot 410. The structure of the U-shaped reinforcing wing plate 420 is as follows: Figure 5 shown.

[0035] In one embodiment, an open rib orthotropic steel bridge deck is provided, wherein a top plate unit is composed of a steel bridge deck, a plurality of axisymmetric bulb flat steel stiffening ribs, and a plurality of rib inner partitions, wherein the top plate unit is manufactured as follows:

[0036] Pretreatment of steel bridge decks and rib inner partitions before cutting can include processes such as rolling, shot blasting and rust removal, and dust removal machine coating of anti-rust primer. Cutting can be carried out after the necessary pretreatment is qualified. Automatic or semi-automatic CNC plasma cutting or other higher precision cutting technologies should be adopted; steel bridge deck material connection should avoid unnecessary welding joints to reduce welding deformation and correction workload; axisymmetric bulb flat steel stiffening ribs are referred to as ribs, which can be obtained through finished product procurement and also need to be pretreated to ensure their quality and applicability.

[0037] Next, before welding the steel bridge deck to the rib plate, it is necessary to ensure that the steel bridge deck, the rib plate and the inner rib partition are accurately aligned, and operate with the help of a special welding platform. Preferably, a welding robot can be used to perform the operation to improve the welding quality and efficiency. During the welding process, priority should be given to welding the fillet weld between the inner side of the rib plate and the steel bridge deck, then welding the fillet weld of the inner rib partition, and finally welding the fillet weld between the outer side of the rib plate and the steel bridge deck. The quality of these welds is crucial to enhancing the connection strength and stability of the overall structure. After welding is completed, the top plate unit welds must also be quality inspected, including weld appearance, structural dimensions, and necessary non-destructive testing, to ensure that the weld quality meets the requirements.

[0038] In this embodiment, the manufacturing method of the diaphragm is as follows:

[0039] At the U-shaped cutout of the diaphragm, a U-shaped reinforcing wing plate is added, and the U-shaped reinforcing wing plate is tightly connected to the cutout of the diaphragm, and a stable T-shaped welded joint is formed by welding. Figure 6 The steel material for the U-shaped reinforcing wing plate added to the U-shaped groove of the diaphragm is selected from carbon steel with a nominal thickness of 8mm-14mm, good plasticity, low strength and excellent welding performance, to ensure that it can undergo a certain deformation when subjected to excessive external force, thereby absorbing and dispersing stress and protecting the structure from damage.

[0040] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An open rib orthotropic steel bridge deck, characterized in that: include: Steel bridge deck, several bulb flat steel stiffeners, several rib inner diaphragms, transverse diaphragms, including: Several of the flat bulb steel stiffening ribs are open ribs, each of the flat bulb steel stiffening ribs is inclined with respect to the steel bridge deck and is arranged axially symmetrically, and is sandwiched between the steel bridge deck and the transverse diaphragm; several of the flat bulb steel stiffening ribs are arranged along the transverse bridge direction; The diaphragm is evenly provided with U-shaped grooves, and the flat bulb steel stiffening rib is connected to the diaphragm through the U-shaped grooves; and the diaphragm is arranged along the longitudinal bridge direction; The inner rib baffles are arranged inside the bulb flat steel stiffening ribs and correspond to the bulb flat steel stiffening ribs one by one; and a plurality of the inner rib baffles are evenly arranged along the longitudinal rib direction; When the bulb flat steel stiffening rib is connected to the transverse partition through the U-shaped groove, the rib inner partition is connected to the U-shaped groove.

2. The open rib orthotropic steel bridge deck according to claim 1, characterized in that: The bulb flat steel stiffening rib comprises a first longitudinal rib surface connected to the steel bridge deck, and a second longitudinal rib surface connected to the bottom of the first longitudinal rib surface; the first longitudinal rib surface and the second longitudinal rib surface of the two bulb flat steel stiffening ribs are symmetrically arranged at intervals.

3. The open rib orthotropic steel bridge deck according to claim 2, characterized in that: The first longitudinal rib surface is connected to the steel bridge deck by welding.

4. The open rib orthotropic steel bridge deck according to claim 2, characterized in that: The bottoms of the first longitudinal rib surfaces of the two bulb flat steel stiffening ribs are inclined towards each other in an inverted eight-shaped pattern, and the second longitudinal rib surfaces of the two bulb flat steel stiffening ribs are both arranged horizontally.

5. The open rib orthotropic steel bridge deck according to claim 1, characterized in that: U-shaped reinforcing wing plates are arranged at the U-shaped groove positions of the transverse partition.

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