Steel-concrete composite beam device

Abstract

The utility model discloses a steel-concrete composite beam device, which relates to the technical field of building construction, and comprises a prefabricated steel skeleton and concrete, the prefabricated steel skeleton comprises an upper flange, two webs, a lower flange, a conical pipe and a longitudinal reinforcing steel bar, the upper flange and the lower flange are arranged in parallel, and the upper flange and the lower flange are connected through the two webs. A cavity is defined by the upper flange, the lower flange and the two webs, two or more conical pipes are evenly arranged in the cavity in the length direction, the upper flange is provided with through holes connected with the small-caliber ends of the conical pipes, longitudinal steel bars are further arranged on the inner sides of the conical pipes, the bottom ends of the longitudinal steel bars are connected to the lower flange, and the top ends of the longitudinal steel bars extend to the position above the upper flange. And concrete is arranged in the conical pipe and on the top surface of the upper flange. The steel-concrete composite beam device is simple in structure and low in machining difficulty, and the bending resistance, the shearing resistance and the deformation resistance of the device can be effectively improved through the concrete located in the conical pipe.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and more specifically, to a steel-concrete composite beam device. Background Technology

[0002] In the prior art, for example, Chinese invention patent CN114370123A discloses a prefabricated steel-concrete composite beam structure using scissor-shaped steel plates connected by high-strength bolts. This structure avoids direct contact between the high-strength bolts and the upper part of the concrete slab by having high-strength bolts pass through both ends of the scissor-shaped steel plates, increasing the contact area between the bolts and the concrete slab and reducing the risk of the upper part of the concrete slab being crushed. However, the above technical solution still has the following drawbacks: 1. During processing, positioning holes need to be pre-drilled on the upper flanges of the concrete slab and the steel beam for installing high-strength bolts, making processing difficult; 2. The bolted connection between the concrete slab and the upper flange of the steel beam has limited shear resistance and is prone to fatigue failure. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, this utility model proposes a steel-concrete composite beam device, which has a simple structure, low processing difficulty, and the concrete located inside the tapered tube can effectively improve the device's resistance to bending, shear and deformation.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] This utility model provides a steel-concrete composite beam device, including a precast steel frame and concrete. The precast steel frame includes an upper flange, a web, a lower flange, tapered tubes, and longitudinal reinforcing bars. The upper and lower flanges are arranged in parallel and connected by two webs. The upper flange, lower flange, and two webs form a cavity. Two or more tapered tubes are evenly arranged along the length of the cavity. The upper flange has a through hole that connects to the small-diameter end of the tapered tube. Longitudinal reinforcing bars are also provided inside the tapered tubes. The bottom end of the longitudinal reinforcing bars is connected to the lower flange, and the top end of the longitudinal reinforcing bars extends to the top of the upper flange. Concrete is provided inside the tapered tubes and on the top surface of the upper flange.

[0006] In a preferred embodiment of this invention, a shear connector is provided at the top of the upper flange.

[0007] In a preferred embodiment of this invention, the two webs are connected by tie bars, and each end of the tie bars is connected to a reinforcing rib, which is then connected to the web.

[0008] In a preferred embodiment of this invention, the number of the tie bars and the tapered tubes are equal and correspond one-to-one.

[0009] In a preferred embodiment of this invention, the tie bars are arranged through the tapered tube, and the tie bars are connected to the longitudinal bars by fasteners.

[0010] The beneficial effects of this utility model are as follows:

[0011] The steel-concrete composite beam device proposed in this utility model has a simple structure and low processing difficulty. The concrete inside the tapered tube can effectively improve the device's resistance to bending, shearing and deformation. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of the steel-concrete composite beam device provided in a specific embodiment of this utility model;

[0013] Figure 2 This is a schematic diagram of a half-section of a prefabricated steel frame.

[0014] In the picture:

[0015] 1. Precast steel frame; 11. Upper flange; 12. Web; 13. Lower flange; 14. Cavity; 15. Tapered tube; 16. Through hole; 17. Longitudinal reinforcement; 2. Concrete; 3. Shear connector; 4. Tie bar; 5. Reinforcing rib; 6. Fixture. Detailed Implementation

[0016] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0017] like Figure 1-2As shown, the embodiment provides a steel-concrete composite beam device, including a precast steel frame 1 and concrete 2. The precast steel frame 1 includes an upper flange 11, a web 12, a lower flange 13, a tapered tube 15, and longitudinal reinforcing bars 17. The upper flange 11 and the lower flange 13 are arranged in parallel and are connected by two webs 12. The upper flange 11, the lower flange 13, and the two webs 12 form a cavity 14. Two or more tapered tubes 15 are evenly arranged along the length direction in the cavity 14. The upper flange 11 is provided with a through hole 16 that connects to the small-diameter end of the tapered tube 15. Longitudinal reinforcing bars 17 are also provided inside the tapered tube 15. The bottom end of the longitudinal reinforcing bars 17 is connected to the lower flange 13, and the top end of the longitudinal reinforcing bars 17 extends above the upper flange 11. Concrete 2 is provided inside the tapered tube 15 and on the top surface of the upper flange 11. In this embodiment, the prefabricated steel frame 1 is made of Q355 steel, which has advantages such as high strength, good plasticity and toughness. The upper flange 11 and lower flange 13 are both horizontally arranged, and the two web plates 12 are both vertically arranged. The upper flange 11 and lower flange 13 are welded to the web plates 12. The tapered tube 15 has a small-diameter end at the top and a large-diameter end at the bottom, with the bottom end connected to the lower flange 13. The outer wall of the tapered tube 15 is connected to the web plate 12. During pouring, concrete 2 can enter the conical tube 15 through the through hole 16 and solidify, which helps to improve the connection strength between the precast steel frame 1 and the concrete 2. The longitudinal steel bars 17 can reinforce the concrete 2 poured in the conical tube 15. When the concrete 2 in the conical tube 15 is under tension, part of the tension will be transmitted to the lower flange 13 through the longitudinal steel bars 17, and the other part of the tension will be borne by the side wall of the conical tube 15 to improve the overall tensile strength of the device.

[0018] Specifically, a shear connector 3 is provided at the top of the upper flange 11. In this embodiment, the shear connector 3 has a T-shaped structure. The shear connector 3 enables the upper flange 11 and the concrete 2 to share the load as a whole, thereby fully utilizing the tensile strength of the steel and the compressive strength of the concrete, while also serving to transfer the longitudinal shear force between the concrete and the steel beam.

[0019] Specifically, the two webs 12 are connected by tie bars 4, and each end of the tie bars 4 is connected to a reinforcing rib 5, which is also connected to the web 12. In this embodiment, the bottom end of the reinforcing rib 5 abuts against the bottom of the upper flange 11, and the bottom end of the reinforcing rib 5 abuts against the top of the lower flange 13, thereby providing auxiliary support. The tie bars 4 are used to fix the reinforcing rib 5 to the web 12.

[0020] Specifically, the number of tie bars 4 and tapered tubes 15 are equal and correspond one-to-one.

[0021] Specifically, the tie rod 4 is installed through the tapered tube 15, and the tie rod 4 is connected to the longitudinal reinforcement 17 through the fastener 6. In this embodiment, the tie rod 4 and the longitudinal reinforcement 17 are connected as one unit by the fastener 6. When the longitudinal reinforcement 17 is subjected to tension or compression, the force is transmitted to the tie rod 4 through the fastener 6, which causes the two reinforcing ribs 5 to move closer to each other to compress the web 12. Under the action of the compressive force, the tapered tube 15 compresses the concrete 2, thereby increasing the friction between the inner wall of the tapered tube 15 and the concrete 2, realizing energy dissipation, and further improving the tensile and compressive strength of the device.

[0022] This utility model has been described through preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. This utility model is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims of this application are all within the protection scope of this utility model.

Claims

1. A steel-concrete composite beam device, characterized in that: It includes a precast steel frame (1) and concrete (2). The precast steel frame (1) includes an upper flange (11), a web (12), a lower flange (13), a tapered tube (15), and longitudinal reinforcing bars (17). The upper flange (11) and the lower flange (13) are arranged in parallel and are connected by two webs (12). The upper flange (11), the lower flange (13), and the two webs (12) form a cavity (14). 14) Two or more tapered tubes (15) are evenly arranged along the length direction. A through hole (16) is provided on the upper flange (11) to connect with the small diameter end of the tapered tube (15). A longitudinal steel bar (17) is also provided on the inner side of the tapered tube (15). The bottom end of the longitudinal steel bar (17) is connected to the lower flange (13). The top end of the longitudinal steel bar (17) extends to the upper flange (11). Concrete (2) is provided inside the tapered tube (15) and on the top surface of the upper flange (11).

2. The steel-concrete composite beam device according to claim 1, characterized in that: A shear connector (3) is provided at the top of the upper flange (11).

3. The steel-concrete composite beam device according to claim 1, characterized in that: The two webs (12) are connected by tie bars (4), and each end of the tie bars (4) is connected to a reinforcing rib (5), which is connected to the web (12).

4. The steel-concrete composite beam device according to claim 3, characterized in that: The number of tie bars (4) and tapered tubes (15) are equal and correspond one-to-one.

5. The steel-concrete composite beam device according to claim 3, characterized in that: The tie bar (4) is installed through the tapered tube (15) and is connected to the longitudinal bar (17) by a fastener (6).

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