Steel-concrete combined bridge deck slab suitable for curved bridge

Abstract

The utility model belongs to the technical field of bridge deck slabs, and provides a steel-concrete combined bridge deck slab suitable for a curved bridge, which comprises a concrete bridge deck slab and a steel box girder, the steel box girder is arranged at the bottom of the concrete bridge deck slab, the steel box girder is composed of sections of steel box girders, a concave shear groove is reserved at the top of the steel box girder, and the concave shear groove is formed in the bottom of the concrete bridge deck slab. The concave shear grooves are designed to be hemispherical, and concrete is poured into the concave shear grooves, so that the steel box girder and the concrete bridge deck slab are cast in place together; a top plate is arranged at the top of the steel box girder, inner side shear nails and outer side shear nails are welded and distributed on the top plate from inside to outside, and the size of the outer side shear nails is 1.5 times that of the inner side shear nails; the concave shear grooves and the shear nails are adopted as connecting components of the steel-concrete combined bridge deck slab, so that the integrity of a steel structure and a concrete structure is effectively guaranteed, and the reliability of a steel-concrete combined system is improved; and the anti-shearing effect of transverse loads such as centrifugal force of a curve bridge on the steel-concrete composite structure is adapted.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge decks, in particular to a steel-concrete composite bridge deck applicable to curved bridges. Background Technique

[0002] The bridge deck is a load-bearing structure directly bearing vehicle wheel pressure. At present, reinforced concrete bridge decks are mostly used in China, while steel-concrete composite bridge decks are still in the development stage in China. The steel-concrete composite bridge deck is generally composed of a steel plate structure and concrete. During construction, the steel structure part can be installed first, and then this steel structure part can be used as a formwork for concrete pouring, eliminating the need for formwork erection, reducing construction costs, improving construction efficiency, and avoiding interference with ground traffic. Compared with the reinforced concrete bridge deck, the steel-concrete composite bridge deck can reduce the structural self-weight, reduce the seismic effect, save the formwork erection process and formwork, shorten the construction period, increase the ductility of the beam, etc.; compared with the steel beam, it can reduce the steel consumption, increase the stiffness, increase the stability and integrity, and enhance the fire resistance and durability of the structure, skillfully combining the mechanical properties of the steel structure and the concrete structure. The application practice of the steel-concrete composite bridge deck in China shows that it combines the advantages of the steel structure and the concrete structure, has significant technical and economic benefits and social benefits, is suitable for the national conditions of China's infrastructure construction, and is one of the main development directions of the future structural system.

[0003] The connection between the steel plate structure and the concrete of the steel-concrete composite bridge deck is mainly in the form of shear studs to ensure that the two work together as a whole. At present, the commonly used shear studs for the steel-concrete composite bridge deck are arranged with shear studs of equal height and size in the constant load surface, which can ensure the consistency of the transverse shear resistance effect of the steel-concrete composite bridge deck. However, for curved bridges, considering the action of loads such as vehicle centrifugal force and lateral sway force, during the driving process, the stress effect of the steel-concrete composite bridge deck of the curved bridge will change. In particular, the shear effect between the steel plate structure and the concrete structure in the transverse bridge direction will increase, and the shear effect will produce an accumulation effect from the inner lane to the outer lane. Therefore, in order to reduce the influence of vehicle driving on the overall stress of the steel-concrete composite bridge deck on the curved bridge, weaken the transverse shear accumulation effect of the curved bridge, invent a steel-concrete composite bridge deck applicable to curved bridges, improve the overall stress of the steel-concrete composite bridge deck, and ensure the coordinated work of the steel structure and the concrete structure, it is of great significance for the construction and safe operation of the steel-concrete composite structure in curved bridges. Content of the Utility Model

[0004] The purpose of the utility model is to provide a steel-concrete composite bridge deck applicable to curved bridges to solve the problems raised in the above background technique.

[0005] To achieve the above object, the utility model provides the following technical solution: a steel-concrete composite bridge deck applicable to a curved bridge, including a concrete bridge deck and a steel box girder. The steel box girder is arranged at the bottom of the concrete bridge deck. The steel box girder is composed of each segmented steel box girder. A concave shear groove is reserved at the top of the steel box girder. The concave shear groove is designed in a hemispherical shape, and concrete is poured in the concave shear groove, so that the steel box girder and the concrete bridge deck are cast in situ together;

[0006] The top of the steel box girder is provided with a top plate. Inner shear studs and outer shear studs are welded and arranged on the top plate from the inside to the outside. The size of the outer shear studs is 1.5 times that of the inner shear studs and changes linearly from the inside to the outside.

[0007] Preferably, the inner shear studs and the outer shear studs penetrate inward in sequence to fix the concrete bridge deck and the steel box girder together to obtain a steel-concrete composite bridge deck.

[0008] Preferably, the concave shear grooves, the inner shear studs and the outer shear studs are spaced along the bridge direction, so that the concave shear grooves, the inner shear studs and the outer shear studs connect the steel box girder and the concrete bridge deck into a whole, forming a steel-concrete composite bridge deck system to jointly bear the force.

[0009] Preferably, grooves are opened below the nail heads of the inner shear studs and the outer shear studs, and shock-absorbing plugs are arranged in the grooves. The shock-absorbing plugs and the grooves are in a trapezoidal structure that fits each other.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] 1. The concave shear grooves and shear studs adopted by the utility model as the connecting components of the steel-concrete composite bridge deck effectively ensure the integrity of the steel structure and the concrete structure, and improve the construction reliability of the steel-concrete composite system.

[0012] 2. The shear studs adopted by the utility model change linearly from the inside to the outside, adapting to the shear effect of the centrifugal force and other lateral loads of the curved bridge on the steel-concrete composite structure.

[0013] 3. The concave shear grooves and shear studs adopted by the utility model are spaced along the bridge longitudinal direction, so that the shear grooves and shear studs can evenly bear the shear effect, ensuring the rationality of the steel-concrete composite system.

[0014] 4. The connecting component structure adopted by the utility model is simple, the operation is convenient, and the number of high-strength connecting pieces and reserved grooves can be adjusted according to the needs of the actual project, increasing the construction flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the steel-concrete composite bridge deck of the utility model;

[0016] Figure 2 This is a sectional view structure diagram of the steel-concrete composite bridge deck of the present utility model;

[0017] Figure 3 This is a top view of the steel-concrete composite bridge deck of the present utility model;

[0018] Figure 4 This is a schematic diagram of the shear studs and shock-absorbing plugs of the present utility model.

[0019] In the figure: 1, concrete bridge deck; 2, steel box girder; 3, inner shear studs; 4, outer shear studs; 5, concave shear groove; 6, shock-absorbing plug. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0022] Embodiment:

[0023] Please refer to Figures 1-4 , the present utility model provides a technical solution for a steel-concrete composite bridge deck applicable to curved bridges: it includes five parts: a concrete bridge deck 1, a steel box girder 2, inner shear studs 3, outer shear studs 4, and a concave shear groove 5;

[0024] In the specific implementation process, when the steel box girder 2 is prefabricated in the factory, a concave shear groove 5 is reserved on the top surface of each section of the steel box girder. The concave shear groove 5 is designed in a hemispherical shape, and concrete is poured into the concave shear groove 5, so that the steel box girder 2 and the concrete bridge deck 1 are cast in situ together to work together to resist the shear effect between the steel structure and the concrete bridge deck; the concave shear groove 5 and the shear studs are used as connecting components of the steel-concrete composite bridge deck, effectively ensuring the integrity of the steel structure and the concrete structure, and improving the construction reliability of the steel-concrete composite system;

[0025] Secondly, when prefabricating the steel box girder 2 in the factory, inner shear studs 3 and outer shear studs 4 are welded and arranged from the inside to the outside at the top plate thereof. The size of the outer shear studs 4 is 1.5 times that of the inner shear studs 3 and changes linearly from the inside to the outside. The steel box girder 2 and the concrete bridge deck 1 are connected through the inner shear studs 3 and the outer shear studs 4 to obtain a steel-concrete composite bridge deck, further ensuring the shear resistance of the steel-concrete interface and enhancing the resistance of the shear studs at the steel-concrete interface to the shear effect under lateral loads such as centrifugal force on the curved bridge.

[0026] The concave shear slots 5 and the inner shear studs 3 and the outer shear studs 4 are distributed at intervals in the longitudinal direction of the bridge, so that the concave shear slots 5 and the inner shear studs 3 and the outer shear studs 4 can evenly bear the shear effect. The steel box girder 2 and the concrete bridge deck 1 are connected into a whole through the concave shear slots 5 and the inner shear studs 3 and the outer shear studs 4 to form a steel-concrete composite bridge deck system that jointly bears force and works together, forming a steel-concrete composite bridge deck structure of a curved bridge with strong resistance.

[0027] The concave shear slots 5 and the shear studs are distributed at intervals in the longitudinal direction of the bridge, so that the shear slots and the shear studs can evenly bear the shear effect, ensuring the rationality of the steel-concrete composite system; it can adapt to the shear effect of lateral loads such as centrifugal force on the curved bridge on the steel-concrete composite structure.

[0028] A shock-absorbing plug 6 is embedded at the bottom of the shear stud. Its main functions are to increase the contact area, reduce the pressure, prevent loosening, protect the parts and the shear stud, and at the same time provide a certain sealing effect; it can also help adjust the fastening force of the connection to adapt to different application requirements, and also includes making the pre-tightening force evenly distributed, anti-loosening, and relieving the stress distribution, protecting the surface of the connecting parts, and resisting wear.

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention, and any reference signs in the claims should not be regarded as limiting the claims involved.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel-concrete composite bridge deck suitable for a curved bridge, comprising a concrete bridge deck (1) and a steel box girder (2), characterized in that: The steel box girder (2) is arranged at the bottom of the concrete bridge deck (1), the steel box girder (2) is composed of segmented steel box girders, a concave shear groove (5) is reserved at the top of the steel box girder (2), the concave shear groove (5) is of hemispherical design, and concrete is poured in the concave shear groove (5), so that the steel box girder (2) and the concrete bridge deck (1) are cast together in situ; The top of the steel box girder (2) is provided with a top plate, on which inner shear nails (3) and outer shear nails (4) are welded and arranged from the inside to the outside, and the size of the outer shear nails (4) is 1.5 times that of the inner shear nails (3), and changes linearly from the inside to the outside.

2. The steel-concrete composite bridge deck suitable for a curved bridge according to claim 1, characterized in that: The inner shear nails (3) and the outer shear nails (4) penetrate inwards in sequence, fixing the concrete bridge deck (1) and the steel box girder (2) together to obtain a steel-concrete composite bridge deck.

3. The steel-concrete composite bridge deck suitable for a curved bridge according to claim 1, characterized in that: The concave shear grooves (5) and the inner shear nails (3) and the outer shear nails (4) are distributed at intervals along the direction of the bridge, so that the concave shear grooves (5), the inner shear nails (3) and the outer shear nails (4) connect the steel box girder (2) and the concrete bridge deck (1) into a whole, forming a steel-concrete composite bridge deck system that is jointly stressed.

4. The steel-concrete composite bridge deck suitable for a curved bridge according to claim 1, characterized in that: A groove is provided below the nail head of the inner shear nail (3) and the outer shear nail (4), and a shock absorbing plug (6) is provided in each of the grooves. The shock absorbing plug (6) and the groove are in a mutually fitting trapezoidal structure.

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