A new type of steel-concrete composite beam structure with quickly replaceable bridge deck

Abstract

The utility model relates to the technical field of composite beam, concretely relates to a novel steel -concrete composite beam structure of bridge deck slab's quick replacement, including steel -concrete composite beam unit, I -shaped steel girder unit and connecting piece, the steel -concrete composite beam unit installs in I -shaped steel girder unit top, the connecting piece fixes the steel -concrete composite beam unit and I -shaped steel girder unit junction, novel steel -concrete composite beam structure not only has reduced the construction difficulty and the period of bridge deck slab replacement significantly, reduced the high altitude operation and traffic influence, also supports local pertinence maintenance, has promoted material utilization efficiency, effectively solved traditional steel -concrete composite beam bridge deck slab replacement difficulty, the industry pain point of high maintenance cost, has prolonged the full life cycle of bridge structure.

Description

Technical Field

[0001] This utility model relates to the field of composite beam technology, specifically to a novel steel-concrete composite beam structure with a bridge deck that can be quickly replaced. Background Technology

[0002] Steel-concrete composite beams efficiently combine the tensile properties of steel with the compressive properties of concrete through shear connectors. The steel beams mainly bear tensile stress, while the concrete bridge deck mainly bears compressive stress, avoiding the waste caused by the performance limitations of a single material. They are widely used in modern bridge engineering.

[0003] The typical development path of cracks in the concrete bridge deck of steel-concrete composite beams is as follows: parallel strip cracks appear in the initial stage, gradually expand and interweave to form a grid-like crack as load and environmental effects occur, and then develop into vertical through cracks, eventually leading to local or large-area spalling of the concrete. This results in a decrease in the stiffness of the bridge deck, a reduction in load transfer efficiency, and may ultimately lead to structural failure and loss of load-bearing capacity. Currently, the bridge deck and steel beams of steel-concrete composite beams are usually permanently connected by shear connectors. When the bridge deck is damaged beyond repair, it is necessary to remove the concrete bridge deck by cutting. The cutting process is prone to damaging the steel beam parent material, and the construction period is long and costly. Therefore, a new type of steel-concrete composite beam structure that can quickly replace the bridge deck is proposed. Utility Model Content

[0004] In order to solve the technical problems existing in the prior art, this utility model provides a novel steel-concrete composite beam structure with quick bridge deck replacement.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a novel steel-concrete composite beam structure with quick bridge deck replacement, comprising a steel-concrete composite beam unit, an I-beam main beam unit, and connecting parts;

[0006] The steel-concrete composite beam unit is installed on top of the I-beam main beam unit, and the connector is used to fix the connection between the steel-concrete composite beam unit and the I-beam main beam unit.

[0007] Preferably, the steel-concrete composite beam unit includes a cast-in-place concrete bridge deck, a steel web assembly, and a steel bottom plate. The cast-in-place concrete bridge deck is located at the upper edge of the steel web assembly, the top part of the steel web assembly is inserted into the cast-in-place concrete bridge deck, and the steel bottom plate is welded to the lower edge of the steel web assembly. Bolt holes for connecting components are provided in the steel bottom plate.

[0008] Preferably, the steel web assembly includes perforated connecting pieces, corrugated steel webs, and perforated reinforcing bars. Two sets of corrugated steel webs are symmetrically arranged. The perforated connecting pieces are welded to the top straight section of the corrugated steel webs. The perforated connecting pieces are inserted into the cast-in-place concrete bridge deck. The perforated connecting pieces have through holes. The perforated reinforcing bars are inserted between the two sets of perforated connecting pieces to connect the cast-in-place concrete bridge deck and the steel web assembly into a whole.

[0009] Preferably, the steel web assembly further includes shear studs, which are welded into the corrugated surface of the corrugated steel web to connect the cast-in-place concrete bridge deck and the steel web assembly into a whole.

[0010] Preferably, the I-beam main beam unit includes an upper flange steel plate, a main beam web plate, and a lower flange steel plate. The upper flange steel plate and the lower flange steel plate are respectively welded to the top and bottom of the main beam web plate. The top of the upper flange steel plate is provided with bolt holes for connecting components.

[0011] Preferably, the connector passes through bolt holes in both the steel base plate and the upper flange steel plate, and the connector connects the steel-concrete composite beam unit and the I-beam main beam unit into a whole.

[0012] Preferably, the connecting member is a high-strength bolt.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model uses steel-concrete composite beam units to replace the traditional monolithic concrete bridge deck, changing the connection between the bridge deck and the steel beam from rigid fixing to a convenient disassembly mode of bolt connection. When the load-bearing capacity of the bridge deck no longer meets the requirements and needs to be replaced, only the connecting nuts need to be loosened to remove a single steel-concrete composite beam unit without damage. The entire process does not require cutting the steel beam parent material or large-scale demolition of the surrounding concrete, avoiding the damage to the main structure caused by traditional replacement methods. The new steel-concrete composite beam structure not only significantly reduces the construction difficulty and cycle of bridge deck replacement and reduces the impact of high-altitude operations and traffic, but also supports localized targeted maintenance, improves material utilization efficiency, effectively solves the industry pain points of difficult replacement and high maintenance costs of traditional steel-concrete composite beam bridge decks, and extends the entire life cycle of the bridge structure.

[0015] 2. In this utility model, a steel-concrete composite beam unit is introduced as the basic structural unit. The corrugated steel web is connected to the concrete bridge deck by setting perforated connecting pieces in the straight section, embedding perforated steel bars, and welding shear studs in the corrugated surface to achieve efficient connection, forming a composite force transmission system. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the combined structure of the steel web plate assembly and the steel bottom plate of this utility model;

[0018] Figure 3 This is a schematic diagram of the steel web plate assembly structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the cast-in-place concrete bridge deck structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the steel web plate assembly and connector of this utility model.

[0021] The numbers in the image represent:

[0022] 1. Steel-concrete composite beam unit; 11. Cast-in-place concrete bridge deck; 12. Steel web assembly; 121. Perforated connecting piece; 122. Corrugated steel web; 123. Perforated reinforcing bar; 124. Shear stud; 13. Steel bottom plate; 2. I-beam main beam unit; 21. Upper flange steel plate; 22. Main beam web; 23. Lower flange steel plate; 3. Connecting parts. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, highlighting the above and other technical features and advantages of the present invention. However, the following embodiments are merely preferred embodiments of the present invention and are not exhaustive.

[0024] Example:

[0025] like Figures 1-5 As shown, this utility model provides a novel steel-concrete composite beam structure with quick bridge deck replacement, including a steel-concrete composite beam unit 1, an I-shaped steel main beam unit 2, and a connector 3;

[0026] The steel-concrete composite beam unit 1 is installed on top of the I-beam main beam unit 2, and the connector 3 fixes the connection between the steel-concrete composite beam unit 1 and the I-beam main beam unit 2.

[0027] Steel-concrete composite beam unit 1 includes cast-in-place concrete bridge deck 11, steel web assembly 12 and steel bottom plate 13;

[0028] The cast-in-place concrete bridge deck 11 is located at the upper edge of the steel web assembly 12. The top part of the steel web assembly 12 is inserted into the cast-in-place concrete bridge deck 11. The steel bottom plate 13 is welded to the lower edge of the steel web assembly 12. Bolt holes for connecting parts 3 are opened in the steel bottom plate 13.

[0029] The steel web assembly 12 includes a perforated connecting piece 121, a corrugated steel web 122, and a perforated steel bar 123;

[0030] Two sets of corrugated steel webs 122 are symmetrically arranged. Perforated connecting pieces 121 are welded to the top straight section of the corrugated steel webs 122. The perforated connecting pieces 121 are inserted into the cast-in-place concrete bridge deck 11. Through holes are provided in the perforated connecting pieces 121. Perforated steel bars 123 are inserted between the two sets of perforated connecting pieces 121 to connect the cast-in-place concrete bridge deck 11 and the steel web assembly 12 into a whole. The two sets of corrugated steel webs 122 arranged symmetrically can effectively distribute the bridge deck load to the steel bottom plate 13. At the same time, the corrugated surface is used to disperse shear force and reduce stress concentration.

[0031] The steel web assembly 12 also includes shear studs 124;

[0032] Shear studs 124 are welded into the corrugated surface of the corrugated steel web 122, connecting the cast-in-place concrete bridge deck 11 and the steel web assembly 12 into a whole, further enhancing the shear resistance between the steel web and the concrete, and preventing the horizontal shear force generated by vehicle braking, steering, etc. from causing the bridge deck and the steel web to slide relative to each other.

[0033] The I-beam main beam unit 2 includes an upper flange steel plate 21, a main beam web 22, and a lower flange steel plate 23. The upper flange steel plate 21 and the lower flange steel plate 23 are respectively welded to the top and bottom of the main beam web 22. The top of the upper flange steel plate 21 has bolt holes for connecting the connector 3. The I-beam main beam unit 2 serves as the main load-bearing component to support the steel-concrete composite beam unit 1.

[0034] The connector 3 passes through the bolt holes in both the steel base plate 13 and the upper flange steel plate 21. The connector 3 uses high-strength bolts. The connector 3 connects the steel-concrete composite beam unit 1 and the I-beam main beam unit 2 into a whole. When replacement is needed, the steel-concrete composite beam unit 1 and the I-beam main beam unit 2 can be separated by loosening the connector 3, which facilitates the replacement of the steel-concrete composite beam unit 1.

[0035] The above are merely preferred embodiments of this utility model and are illustrative rather than restrictive. Those skilled in the art will understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of this utility model, all of which will fall within the protection scope of this utility model.

Claims

1. A novel steel-concrete composite beam structure with quickly replaceable bridge deck, characterized in that: It includes a steel-concrete composite beam unit (1), an I-beam main beam unit (2) and a connector (3). The steel-concrete composite beam unit (1) is installed on top of the I-beam main beam unit (2), and the connector (3) fixes the connection between the steel-concrete composite beam unit (1) and the I-beam main beam unit (2).

2. The novel steel-concrete composite beam structure with quick-replacement bridge deck as described in claim 1, characterized in that, The steel-concrete composite beam unit (1) includes a cast-in-place concrete bridge deck (11), a steel web assembly (12), and a steel bottom plate (13). The cast-in-place concrete bridge deck (11) is located at the upper edge of the steel web assembly (12). The top part of the steel web assembly (12) is inserted into the cast-in-place concrete bridge deck (11). The steel bottom plate (13) is welded to the lower edge of the steel web assembly (12). Bolt holes for connecting parts (3) are provided in the steel bottom plate (13).

3. A novel steel-concrete composite beam structure with quickly replaceable bridge deck as described in claim 2, characterized in that, The steel web assembly (12) includes a perforated connecting piece (121), a corrugated steel web (122), and a perforated steel bar (123). Two sets of corrugated steel webs (122) are symmetrically arranged. The perforated connecting piece (121) is welded to the top straight section of the corrugated steel web (122). The perforated connecting piece (121) is inserted into the cast-in-place concrete bridge deck (11). The perforated connecting piece (121) has a through hole. The perforated steel bar (123) is inserted between the two sets of perforated connecting pieces (121) to connect the cast-in-place concrete bridge deck (11) and the steel web assembly (12) into a whole.

4. A novel steel-concrete composite beam structure with quickly replaceable bridge deck as described in claim 3, characterized in that, The steel web assembly (12) also includes shear studs (124), which are welded to the corrugated surface of the corrugated steel web (122) to connect the cast-in-place concrete bridge deck (11) and the steel web assembly (12) into a whole.

5. A novel steel-concrete composite beam structure with quickly replaceable bridge deck as described in claim 1, characterized in that, The I-beam main beam unit (2) includes an upper flange steel plate (21), a main beam web plate (22) and a lower flange steel plate (23). The upper flange steel plate (21) and the lower flange steel plate (23) are respectively welded to the top and bottom of the main beam web plate (22). The upper flange steel plate (21) has bolt holes on the top for connecting parts (3) to be connected.

6. A novel steel-concrete composite beam structure with quick-replacement bridge deck as described in claim 1, characterized in that, The connector (3) passes through the bolt holes in both the steel base plate (13) and the upper flange steel plate (21), and the connector (3) connects the steel-concrete composite beam unit (1) and the I-beam main beam unit (2) into a whole.

7. A novel steel-concrete composite beam structure with quick-replacement bridge deck as described in claim 6, characterized in that, The connector (3) is made of high-strength bolts.

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