U-shaped steel-concrete composite beam bridge based on inverted hat-shaped perforated steel plate connectors

Abstract

This utility model relates to a U-shaped steel-concrete composite beam bridge based on an inverted cap-shaped perforated steel plate connector, belonging to the technical field of steel-concrete composite beam bridges. It includes a U-shaped steel beam, inner concrete lining, high-strength studs, corrugated connectors, inverted cap-shaped perforated steel plate connectors, high-strength bolts, high-strength nuts, vertical bolts and nuts, and high-performance grouting material. The corrugated connectors are welded to the bottom of the U-shaped steel beam; the high-strength studs are welded to the sides and bottom of the U-shaped steel beam; the inverted cap-shaped perforated steel plate connectors are connected to the flanges of the U-shaped steel beam using vertical bolts and nuts; the inverted cap-shaped perforated steel plate connectors are intermittently arranged on the flanges of the U-shaped steel beam; the U-shaped steel beam has openings on its sides, and the web of the U-shaped steel beam is secured using high-strength bolts and nuts; shear grooves for the inverted cap-shaped perforated steel plate connectors are pre-formed during the inner concrete pouring, and high-performance grouting material is subsequently poured into the shear grooves. This utility model features reliable interface connection, clear force transmission, and small pouring volume, meeting the requirements for rapid construction.

Description

Technical Field

[0001] This utility model relates to a U-shaped steel-concrete composite beam bridge based on an inverted cap-shaped perforated steel plate connector, belonging to the technical field of steel-concrete composite beam bridges. Background Technology

[0002] Steel-concrete composite structures fully leverage the compressive strength of concrete and the tensile strength of steel. Compared to concrete structures, steel-concrete composite structures can improve the ductility of components or structures, reduce self-weight by 40%-60%, and shorten the construction period by 30%-50%. Compared to steel structures, steel-concrete composite structures can enhance the stability of components and the overall integrity of the structure, improve durability and fire resistance, reduce steel usage by 50%, and reduce costs by 10%-40%. Due to their economic efficiency, strong environmental adaptability, strong fire resistance and corrosion resistance, and sustainable development, steel-concrete composite structures are gradually gaining favor in the bridge engineering field and have attracted widespread attention.

[0003] U-shaped steel-concrete composite beams are a new type of structure derived from traditional steel-concrete composite beams. They are T-shaped transverse load-bearing composite members formed by integrally casting concrete within U-shaped steel sections. They possess advantages such as high stiffness, high load-bearing capacity, and good ductility, aligning with the development trend of prefabricated buildings. Under ideal conditions where the U-shaped steel, internal concrete, concrete slab, and beam flange work together, U-shaped steel-concrete composite beams offer the following advantages: the internal concrete enhances the local stability of the steel plate; the external U-shaped steel maintains the integrity of the internal concrete, enhancing the composite beam's deformation capacity; the integral casting of the concrete slab and web enhances the overall integrity of the composite beam; compared to traditional reinforced concrete beams, the creep and shrinkage deformation of freshly poured concrete is reduced by 40%; the U-shaped steel can also serve as permanent formwork for the concrete beam web, reducing the need for supports and formwork, requiring less reinforcement, facilitating construction, and shortening the construction period; steel components are prefabricated in the factory and transported to the site for assembly, achieving industrialized production. It is worth noting that the prerequisite for leveraging the performance advantages of this composite beam is to ensure that the interface between the U-shaped steel and the inner concrete and the interface between the concrete flange and the beam flange do not suffer local damage before the overall composite beam fails.

[0004] There are many types of U-shaped steel-concrete composite beams, each with its own advantages and disadvantages, but none of them have completely solved the problems of steel-concrete interface separation and slippage, and wing-web interface lifting and slippage. In view of this, in order to further deepen the application and promotion of U-shaped steel-concrete composite beams, it is crucial to study a new type of U-shaped steel-concrete composite beam connection method that is easy to construct, has good integrity, and reliable connection. Utility Model Content

[0005] To address the aforementioned problems in existing technologies, this utility model proposes a U-shaped steel-concrete composite beam bridge based on an inverted cap-shaped perforated steel plate connector, which solves the problems of reliable interface connection, convenient construction, good integrity and stability, and achieves the design goal of "high-performance materials - efficient interface connection - high-performance structure".

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] The U-shaped steel-concrete composite beam bridge based on the inverted hat-shaped perforated steel plate connector is mainly composed of U-shaped steel beams, inner concrete, high-strength studs, corrugated connectors, inverted hat-shaped perforated steel plate connectors, high-strength bolts, high-strength nuts, vertical bolts and nuts, and high-performance grouting material.

[0008] The corrugated connector is welded to the inner bottom of the U-shaped steel beam; the high-strength studs are welded to the sides and bottom of the U-shaped steel beam to improve the shear resistance of the interface; openings are provided on the web of the side of the U-shaped steel beam, and high-strength bolts and nuts are used to fasten the webs on both sides of the U-shaped steel beam; concrete is poured into the top and inside of the U-shaped steel beam, thereby casting the high-strength studs, corrugated connectors, high-strength bolts and high-strength nuts together as a whole to form an inner concrete enclosure; the inner concrete enclosure on the upper part of the flange of the U-shaped steel beam forms the bridge deck, on which a shear groove is reserved, and an inverted cap-shaped perforated steel plate connector is provided in the shear groove, and high-performance grouting material is poured into the shear groove afterward; the inverted cap-shaped perforated steel plate connector is connected to the flange of the U-shaped steel beam by vertical bolts and nuts.

[0009] Furthermore, the U-shaped steel beam is provided with inward-turned flanges and outward-turned flanges. The inward-turned flanges can constrain the inner concrete, and the inward-turned flanges and outward-turned flanges can provide templates for casting high-performance grouting material using inverted hat-shaped perforated steel plate connectors.

[0010] Furthermore, the wavy connector has concave and convex wavy teeth, and a concrete tenon can be formed in the concave wavy teeth.

[0011] Furthermore, the high-strength screw is arranged in the concave wavy key of the wavy connector.

[0012] Furthermore, the inverted cap-shaped perforated steel plate connector has an elliptical opening, which can form a concrete tenon in the elliptical opening when high-performance grout is poured.

[0013] Furthermore, the part of the inverted hat-shaped perforated steel plate connector that connects to the U-shaped steel beam flange is provided with an opening to facilitate the screwing in of the vertical screw and nut.

[0014] Furthermore, the inverted hat-shaped perforated steel plate connector is formed by bending a straight steel plate with an elliptical hole, and the part connected to the U-shaped steel beam flange is at a certain angle to improve the anti-vertical separation performance of the bridge deck and the U-shaped steel beam.

[0015] Furthermore, a distance is reserved between the end of the inverted cap-shaped perforated steel plate connector and the end of the shear groove. This distance does not exceed 2 / 3 of the length of the inverted cap-shaped perforated steel plate connector along the longitudinal direction of the bridge, so as to reduce the amount of high-performance grout to be poured on site.

[0016] Furthermore, the portion of the shear groove that contacts the high-performance grouting material is provided with a roughened structure.

[0017] Furthermore, the inverted cap-shaped perforated steel plate connector is intermittently arranged on the flange of the U-shaped steel beam.

[0018] Compared with the prior art, the implementation of this utility model can achieve the following significant effects:

[0019] This invention proposes a U-shaped steel-concrete composite beam bridge based on inverted cap-shaped perforated steel plate connectors. This composite beam is suitable for bridges with conventional spans, approximately 20-50 meters. The connections at the U-shaped steel-inner concrete interface and the concrete flange-beam flange interface are reliable, exhibiting excellent shear and fatigue resistance. High-strength bolts and nuts further enhance the overall integrity and durability of the composite beam.

[0020] 1. This utility model designs the steel plate connector as a wave shape, which can form a concrete tenon in the concave side tooth key. Compared with the traditional perforated steel plate connector, it has higher shear bearing capacity and shear stiffness, and at the same time has better deformation capacity.

[0021] 2. This utility model uses high-strength bolts and high-strength nuts to connect the two webs of the U-shaped steel beam. Compared with traditional U-shaped steel-concrete composite beams, this prevents the U-shaped steel beam from separating from the concrete slab due to insufficient interface connection, greatly improving the integrity and stability of the U-shaped steel-concrete composite beam. Furthermore, the high-strength bolts and high-strength nuts can serve as part of the shear-resistant component of the corrugated connector, improving the shear bearing capacity of the interface between the U-shaped steel beam and the inner concrete.

[0022] 3. In this utility model, the inverted hat-shaped perforated steel plate connector is arranged in the shear groove, and a distance is reserved between the end of the inverted hat-shaped perforated steel plate connector and the end of the shear groove. This can give full play to the bearing capacity of the concrete at the end of the inverted hat-shaped perforated steel plate connector, and significantly improve the shear bearing capacity and shear stiffness of the connection interface.

[0023] 4. Most of the construction procedures of this utility model are completed in the processing plant. Only one step of pouring high-performance grouting material needs to be completed on the construction site, which greatly improves the construction speed, reduces the impact on the surrounding environment, and meets the needs of rapid bridge construction. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0025] Figure 2 This is an overall schematic diagram of a U-shaped steel-concrete composite beam bridge with inverted cap-shaped perforated steel plate connectors, excluding the bridge deck.

[0026] Figure 3 yes Figure 2 AA cross-section view;

[0027] Figure 4 yes Figure 3 BB cross-section;

[0028] Figure 5 yes Figure 3 CC cross-section;

[0029] Figure 6 yes Figure 2 Top view;

[0030] Figure 7 This is a schematic diagram of a high-strength screw and a high-strength nut;

[0031] Figure 8 Schematic diagram of an inverted cap-shaped perforated steel plate connector;

[0032] Figure 9 This is a schematic diagram of a partial structure within the shear groove of a U-shaped steel-concrete composite beam based on an inverted hat-shaped perforated steel plate connector;

[0033] Figure 10 Schematic diagram of a wave-shaped connector;

[0034] Figure 11 This is a schematic diagram of the construction process for a U-shaped steel-concrete composite beam bridge based on inverted cap-shaped perforated steel plate connectors.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1—U-shaped steel beam; 2—Inner concrete enclosure; 3—High-strength studs; 4—Wave-shaped connectors; 5—Inverted cap-shaped perforated steel plate connectors; 6—High-strength bolts; 7—High-strength nuts; 8—Vertical bolts and nuts; 9—High-performance grouting material. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-11The present invention will be further described in detail below to facilitate a clear understanding of the present invention, but these descriptions do not constitute a limitation thereof.

[0038] Example 1

[0039] like Figure 1-2 As shown, this utility model discloses a U-shaped steel-concrete composite beam bridge based on an inverted cap-shaped perforated steel plate connector. This composite beam is suitable for bridges with a conventional span of 50 meters. The U-shaped steel-concrete composite beam bridge mainly consists of a U-shaped steel beam 1, inner concrete 2, high-strength studs 3, corrugated connectors 4, inverted cap-shaped perforated steel plate connectors 5, high-strength bolts 6, high-strength nuts 7, vertical bolts and nuts 8, and high-performance grouting material 9.

[0040] like Figure 4 As shown, the corrugated connector 4 is welded to the inner bottom of the U-shaped steel beam 1. High-strength studs 3 are welded to the sides and bottom of the U-shaped steel beam 1 to improve the shear resistance of the interface. The high-strength studs 3 not only improve the shear resistance of the interface between the U-shaped steel beam 1 and the inner concrete 2, but also inhibit the separation of the steel-concrete interface, thus having a good anti-lifting effect.

[0041] like Figure 1-2 As shown in Figure 4-5, openings are provided on the side web of the U-shaped steel beam 1, and high-strength screws 6 and high-strength nuts 7 are used to fasten the webs on both sides of the U-shaped steel beam 1.

[0042] In this embodiment, concrete is poured into the top and inside of the U-shaped steel beam 1, thereby casting the high-strength studs 3, corrugated connectors 4, high-strength bolts 6 and high-strength nuts 7 together to form an inner concrete 2.

[0043] like Figure 1 As shown, the inner concrete 2 encased in the upper part of the flange of the U-shaped steel beam 1 forms the bridge deck, on which a shear groove is pre-reserved. An inverted cap-shaped perforated steel plate connector 5 is installed within the shear groove, and high-performance grout 9 is subsequently poured into the shear groove. The contact area between the shear groove and the high-performance grout 9 is provided with a roughened structure. Figure 2 As shown, the inverted hat-shaped perforated steel plate connector 5 is connected to the flange of the U-shaped steel beam 1 by vertical screws and nuts 8. The U-shaped steel beam 1 is provided with inward-turned flanges and outward-turned flanges. The inward-turned flanges can restrain the inner concrete 2, and the inward-turned flanges and outward-turned flanges can provide templates for pouring high-performance grouting material 9 through the inverted hat-shaped perforated steel plate connector 5. Figure 8-9As shown, the inverted hat-shaped perforated steel plate connector 5 has an elliptical opening. When the high-performance grout 9 is poured, a concrete tenon can be formed in the elliptical opening, improving the shear resistance of the interface between the concrete flange and the beam flange. Furthermore, the portion of the inverted hat-shaped perforated steel plate connector 5 that connects to the flange of the U-shaped steel beam 1 has an opening to facilitate the screwing in of the vertical bolts and nuts 8. In this embodiment, the inverted hat-shaped perforated steel plate connector 5 is formed by bending a straight steel plate with an elliptical opening, and the portion connecting to the flange of the U-shaped steel beam 1 is at a certain angle to improve the resistance to vertical separation between the bridge deck and the U-shaped steel beam 1.

[0044] In this embodiment, a distance is reserved between the end of the inverted hat-shaped perforated steel plate connector 5 and the end of the shear groove. This distance does not exceed 2 / 3 of the length of the inverted hat-shaped perforated steel plate connector 5 along the longitudinal direction of the bridge, so as to reduce the amount of high-performance grouting material 9 to be poured on site. In addition, eight sets of inverted hat-shaped perforated steel plate connectors 5 are intermittently arranged on the flange of the U-shaped steel beam 1.

[0045] like Figure 4 , 10 As shown, the corrugated connector 4 has concave and convex corrugated teeth, allowing a concrete tenon to be formed in the concave corrugated teeth. It possesses good shear and fatigue resistance, provides sufficient longitudinal shear capacity, and exhibits good ductility. For example... Figure 3 and Figure 7 As shown, the high-strength screw 6 is arranged in the concave wave-shaped toothed key of the wave-shaped connector 4. On the one hand, it can serve as part of the shear-resistant component of the wave-shaped connector 4, and on the other hand, it can improve the integrity and stability of the U-shaped steel-concrete composite beam bridge.

[0046] Example 2

[0047] like Figure 11 As shown in the figure, the construction method of the U-shaped steel-concrete composite beam bridge structure based on the inverted cap-shaped perforated steel plate connector in this embodiment includes the following steps:

[0048] S1. Prepare U-shaped steel beam 1, high-strength studs 3, corrugated connectors 4, high-strength screws 6, high-strength nuts 7, vertical screws and nuts 8 according to the design dimensions.

[0049] S2. Prepare the inverted hat-shaped perforated steel plate connector 5 according to the design dimensions, make holes at the designated positions and bend it.

[0050] S3. Weld the high-strength studs 3 and the corrugated connectors 4 to the designated positions on the U-shaped steel beam 1.

[0051] S4. Use high-strength screws 6 and high-strength nuts 7 to fasten the two web plates of the U-shaped steel beam 1.

[0052] S5. Use vertical screws and nuts 8 to fix the inverted cap-shaped perforated steel plate connector 5 to the flange of the U-shaped steel beam 1.

[0053] S6. Reserve the shear groove of the inverted cap-shaped perforated steel plate connector 5, then pour the inner concrete 2 and cure it.

[0054] S7. The shear groove is roughened.

[0055] S8. Hoist the U-shaped steel-concrete composite beam to the construction site and pour high-performance grout into the shear groove.

[0056] The above are merely preferred embodiments of this utility model and do not constitute any limitation on the structure of this utility model. The arrangement and quantity of this utility model are not limited to this example and can be optimized according to actual engineering conditions. Any modifications, equivalent changes, and decorations made to the above embodiments based on the technical principles of this utility model, without departing from the scope of the technical solution of this utility model, are still within the scope of the technical solution of this utility model.

Claims

1. A U-shaped steel-concrete composite beam bridge based on inverted hat-shaped perforated steel plate connectors, characterized in that: The U-shaped steel-concrete composite beam bridge is mainly composed of U-shaped steel beams (1), inner concrete (2), high-strength studs (3), corrugated connectors (4), inverted cap-shaped perforated steel plate connectors (5), high-strength bolts (6), high-strength nuts (7), vertical bolts and nuts (8), and high-performance grouting material (9). The corrugated connector (4) is welded to the inner bottom of the U-shaped steel beam (1); the high-strength studs (3) are welded to the sides and bottom of the U-shaped steel beam (1) to improve the shear resistance of the interface; openings are provided on the web of the side of the U-shaped steel beam (1), and high-strength bolts (6) and high-strength nuts (7) are used to fasten the webs on both sides of the U-shaped steel beam (1); the top and interior of the U-shaped steel beam (1) are filled with concrete, thereby securing the high-strength studs (3) and corrugated connectors (4). The high-strength screw (6) and the high-strength nut (7) are cast together to form an inner concrete (2); the inner concrete (2) on the upper part of the U-shaped steel beam (1) forms a bridge deck, on which a shear groove is reserved, and an inverted cap-shaped perforated steel plate connector (5) is installed in the shear groove, and high-performance grout (9) is poured into the shear groove; the inverted cap-shaped perforated steel plate connector (5) is connected to the U-shaped steel beam (1) wing plate by a vertical screw and nut (8).

2. The U-shaped steel-concrete composite beam bridge based on the inverted hat-shaped perforated steel plate connector according to claim 1, characterized in that: The U-shaped steel beam (1) is provided with an inward flange and an outward flange. The inward flange can constrain the inner concrete (2). The inward flange and the outward flange can provide templates for pouring high-performance grout (9) for the inverted cap-shaped perforated steel plate connector (5).

3. The U-shaped steel-concrete composite beam bridge based on the inverted hat-shaped perforated steel plate connector according to claim 1, characterized in that: The wave-shaped connector (4) has concave and convex wave-shaped teeth, and a concrete tenon can be formed in the concave wave-shaped teeth.

4. The U-shaped steel-concrete composite beam bridge based on the inverted hat-shaped perforated steel plate connector according to claim 1, characterized in that: The high-strength screw (6) is arranged in the concave wavy key of the wavy connector (4).

5. The U-shaped steel-concrete composite beam bridge based on the inverted hat-shaped perforated steel plate connector according to claim 1, characterized in that: The inverted cap-shaped perforated steel plate connector (5) has an elliptical opening, which can form a concrete tenon in the elliptical opening when the high-performance grout (9) is poured.

6. The U-shaped steel-concrete composite beam bridge based on the inverted hat-shaped perforated steel plate connector according to claim 1, characterized in that: The inverted cap-shaped perforated steel plate connector (5) is provided with an opening at the part where it connects to the wing plate of the U-shaped steel beam (1) to facilitate the screwing in of the vertical screw and nut (8).

7. The U-shaped steel-concrete composite beam bridge based on the inverted hat-shaped perforated steel plate connector according to claim 1, characterized in that: The inverted hat-shaped perforated steel plate connector (5) is formed by bending a straight steel plate with an elliptical hole, and the part connected to the wing plate of the U-shaped steel beam (1) is at a certain angle to improve the anti-vertical separation performance of the bridge deck and the U-shaped steel beam (1).

8. The U-shaped steel-concrete composite beam bridge based on the inverted hat-shaped perforated steel plate connector according to claim 1, characterized in that: The inverted cap-shaped perforated steel plate connector (5) has a distance between its end and the end of the shear groove. This distance does not exceed 2 / 3 of the length of the inverted cap-shaped perforated steel plate connector (5) along the bridge direction, so as to reduce the amount of high-performance grout (9) poured on site.

9. The U-shaped steel-concrete composite beam bridge based on the inverted hat-shaped perforated steel plate connector according to claim 1, characterized in that: The contact portion between the shear groove and the high-performance grout (9) is provided with a roughened structure.

10. The U-shaped steel-concrete composite beam bridge based on the inverted hat-shaped perforated steel plate connector according to claim 1, characterized in that: The inverted cap-shaped perforated steel plate connector (5) is intermittently arranged on the flange of the U-shaped steel beam (1).

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