T-shaped shear connector of steel-concrete composite structure

Abstract

The utility model discloses a steel-concrete combined structure T-shaped shearing force connecting piece which comprises first connecting pieces, second connecting pieces, connecting cavities, connecting parts and through holes, the number of the first connecting pieces is two, the connecting cavities are formed in the two first connecting pieces, the connecting parts are installed in the connecting cavities, and the through holes are formed in the second connecting pieces. A second connecting piece fixedly installed between the two first connecting pieces is welded to the side face of the connecting part. According to the T-shaped shear connector of the steel-concrete composite structure, through the T-shaped PBL shear key composed of the first connecting piece, the second connecting piece, the connecting cavity and the connecting component, the flange part of the T-shaped PBL shear key can increase the contact area of steel and concrete, high anti-drawing performance is provided, and meanwhile, in actual use, the T-shaped shear connector is not prone to deformation, and the service life of the steel-concrete composite structure is prolonged. The influence of vertical separating force and transverse and horizontal and longitudinal shearing force on the concrete can be considered in the stress process, and the shear-resistant bearing capacity of the concrete is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field related to steel plates and concrete connectors, in particular to a T-shaped shear connector for a steel-concrete composite structure. Background Art

[0002] PBL connectors are shear connectors composed of perforated steel plates, concrete tenons and through-steel bars. They are usually arranged at key positions of steel-concrete composite beams. The perforated steel plates are welded to the flanges of steel beams, which can not only transmit the longitudinal shear force between concrete and steel beams, but also resist the lifting action that separates the two. At present, the most widely used connectors in engineering applications are studs. At the same time, PBL connectors have the advantages of high shear bearing capacity, high stiffness and good fatigue resistance. They are also beginning to be popularized in steel-concrete connection structures of various buildings and bridge structures such as steel-concrete composite beams, hybrid beams and hybrid bridge tower joints, and steel tube concrete structures. However, at present, the tensile shear capacity of composite structures is mostly concentrated on stud connectors, and there is little research on the tensile shear capacity of T-shaped PBL shear keys. Therefore, a T-shaped shear connector of steel-concrete composite structure with strong tensile resistance is proposed. Utility Model Content

[0003] The utility model aims to provide a steel-concrete composite structure T-shaped shear connector, which has the functions of strong pull-out resistance and shear bearing capacity.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a steel-concrete composite structure T-shaped shear connector, comprising a first connector, a second connector, a connecting cavity, a connecting component and a through hole, wherein the first connector is provided in two groups, and connecting cavities are opened inside the two groups of the first connectors, and connecting components are installed inside the connecting cavities, and the side of the connecting component is welded with a second connector installed and fixed between the two groups of first connectors, and the second connector is arranged near the connecting cavity opened inside the first connector, and a through hole is opened inside the connecting component.

[0005] Preferably, the structural shape formed by the first connecting member and the connecting cavity is a "concave" shape, and the bottom of the connecting cavity is located at one-third of the inner side of the first connecting member from bottom to top.

[0006] Preferably, the top of the second connecting member extends to the outside of the first connecting member, the bottom of the second connecting member is located at one sixth of the inner side of the first connecting member from bottom to top, and the cross-sectional height of the second connecting member is the same as that of the first connecting member.

[0007] Preferably, the connecting component is located at the center of the inner side of the connecting cavity, the cross-sectional area of ​​the connecting component and the connecting cavity are the same, and the second connecting piece is welded to the side of the connecting component.

[0008] Preferably, a plurality of through holes are arranged in a ring shape at equal intervals, and the through holes are arranged at the centers of concentric circles inside the connecting component, and the through holes are used to position the steel bars inside the through holes.

[0009] Compared with the prior art, the beneficial effect of the utility model is that the steel-concrete composite structure T-shaped shear connector, through the T-shaped PBL shear key composed of the first connector, the second connector, the connecting cavity and the connecting component, the flange part of the T-shaped PBL shear key can increase the contact area between the steel and the concrete, and provide a strong pull-out resistance. At the same time, in actual use, the influence of the vertical separation force and the transverse and horizontal longitudinal shear force can be taken into account during the force process, thereby effectively improving its shear bearing capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0011] Figure 2 This is a front view structural diagram of a first connecting member of the utility model;

[0012] Figure 3 It is a schematic diagram of the side section structure of the utility model;

[0013] Figure 4 This is a front structural schematic diagram of the utility model;

[0014] Figure 5 It is a schematic diagram of the experimental results structure of the second connecting piece of the utility model.

[0015] In the figure: 1. first connecting member; 2. second connecting member; 3. connecting cavity; 4. connecting component; 5. through hole. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figure 1-5 , the utility model provides a technical solution: a steel-concrete composite structure T-shaped shear connector, comprising a first connector 1, a second connector 2, a connecting cavity 3, a connecting component 4 and a through hole 5;

[0018] Two groups of first connecting members 1 are provided, and connecting cavities 3 are opened inside the two groups of first connecting members 1, and connecting components 4 are installed inside the connecting cavities 3. Second connecting members 2 installed and fixed between the two groups of first connecting members 1 are welded to the side of the connecting component 4, and the second connecting member 2 is arranged close to the connecting cavity 3 opened inside the first connecting member 1, and a through hole 5 is opened inside the connecting component 4.

[0019] Furthermore, a group of T-shaped shear connectors can be formed by the first connector 1, the second connector 2, the connecting cavity 3 and the connecting component 4, which increases the size of the contact surface with the concrete during actual use, thereby improving its anti-pullout performance.

[0020] The structural shape formed by the first connecting member 1 and the connecting cavity 3 is a "concave" shape. The bottom of the connecting cavity 3 is located at one-third of the inner side of the first connecting member 1 from bottom to top. The top of the second connecting member 2 extends to the outside of the first connecting member 1. The bottom of the second connecting member 2 is located at one-sixth of the inner side of the first connecting member 1 from bottom to top. The cross-sectional height of the second connecting member 2 is the same as the cross-sectional height of the first connecting member 1. The connecting component 4 is located at the center of the inner side of the connecting cavity 3. The cross-sectional areas of the connecting component 4 and the connecting cavity 3 are the same. The second connecting member 2 is welded to the side of the connecting component 4.

[0021] Furthermore, by designing the positions of the first connector 1, the second connector 2, the connecting cavity 3 and the connecting component 4, the shear bearing capacity of the T-shaped shear connector can be effectively improved during actual use.

[0022] A plurality of through holes 5 are arranged in a ring shape at equal intervals. The through holes 5 are arranged at the center of the concentric circles inside the connecting component 4. The through holes 5 are used to position the steel bars inside the connecting component 4.

[0023] Furthermore, by designing the through hole 5, the through steel bars inside the through hole can be supported and positioned during actual use.

[0024] It should be noted that: Figure 5 It is the change of the failure mode of the second connector 2 when the T-shaped shear connector is subjected to different vertical separation forces and transverse and horizontal longitudinal shear forces during the experiment.

[0025] 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. A steel-concrete composite structure T-shaped shear connector, comprising a first connector (1), a second connector (2), a connecting cavity (3), a connecting component (4) and a through hole (5), characterized in that: The first connecting member (1) is provided with two groups, and a connecting cavity (3) is provided inside the two groups of the first connecting members (1), and a connecting component (4) is installed inside the connecting cavity (3). A second connecting member (2) is welded to the side of the connecting component (4) and is installed and fixed between the two groups of the first connecting members (1). The second connecting member (2) is arranged close to the connecting cavity (3) provided inside the first connecting member (1), and a through hole (5) is provided inside the connecting component (4).

2. The steel-concrete composite structure T-shaped shear connector according to claim 1, characterized in that: The structural shape formed by the first connecting member (1) and the connecting cavity (3) is a "concave" shape, and the bottom of the connecting cavity (3) is located at one third of the inner side of the first connecting member (1) from bottom to top.

3. The steel-concrete composite structure T-shaped shear connector according to claim 1, characterized in that: The top of the second connecting member (2) extends to the outside of the first connecting member (1), the bottom of the second connecting member (2) is located at one sixth of the inside of the first connecting member (1) from bottom to top, and the cross-sectional height of the second connecting member (2) is the same as the cross-sectional height of the first connecting member (1).

4. The steel-concrete composite structure T-shaped shear connector according to claim 1, characterized in that: The connecting component (4) is located at the center of the inner side of the connecting cavity (3); the cross-sectional area of ​​the connecting component (4) and the connecting cavity (3) are the same; and the second connecting piece (2) is welded to the side of the connecting component (4).

5. The steel-concrete composite structure T-shaped shear connector according to claim 1, characterized in that: A plurality of through holes (5) are arranged in a ring shape at equal intervals. The through holes (5) are arranged at the center of the concentric circles inside the connecting component (4). The through holes (5) are used to position the steel bars inside the through holes.

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