Prefabricated groove-shaped steel-concrete composite beam

Abstract

The utility model discloses a prefabricated groove-shaped steel-concrete composite beam which comprises U-shaped channel steel, a supporting base is fixedly connected to the inner bottom face of the U-shaped channel steel, a first supporting frame and a second supporting frame are fixedly connected to the upper surface of the supporting base, and the first supporting frame and the second supporting frame are both in an X shape. The first supporting frames in the middle of the U-shaped channel steel are dense, the first supporting frames distributed at the two ends of the long axis of the U-shaped channel steel are sparse, the U-shaped channel steel is filled with concrete, the concrete is provided with a mechanical anchoring device, and the mechanical anchoring device comprises a mounting hole, an expansion sleeve, a conical head, a threaded hole, an anchor rod, a gasket and a fastening nut. By means of the device, through cooperation of the first supporting frame and the second supporting frame, efficient bearing capacity and excellent stability are provided, and through cooperation of the anchor rod, the expansion sleeve and the conical head, the stability, durability and safety of the whole structure are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of building structures, in particular to a prefabricated channel-shaped steel-concrete composite beam. Background Art

[0002] Existing building structure technologies mostly use complex supporting structures and close coordination of multiple components for stability. However, this method is complex to install and costly when used. For example, a Chinese patent discloses "a new type of partially prefabricated steel-concrete composite beam" with an application number of "CN201922410790.1". It uses rectangular tube flanges and cast-in-place concrete wing plates to improve the lateral bending-torsional buckling resistance of the composite beam and better utilize the performance of the steel. At the same time, the rectangular tube flanges with openings on the upper surface are cast in situ together with the wing plates, which effectively solves the problem of connection reliability. The U-shaped channel steel is filled with concrete as the lower flange, which improves the bending stiffness and bearing capacity of the composite beam, improves the anti-buckling capacity of the flange, and also improves the ability of the composite beam to resist negative bending moments. However, its structure is complex, installation is more troublesome, and it occupies a small space. Utility Model Content

[0003] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art, and to provide a prefabricated trough-shaped steel-concrete composite beam. Through the coordination of the distribution of the first support frame and the second support frame, the maximum bending moment that the middle part may bear is coped with, and the bending moment of the two end areas is smaller, thereby saving material usage and cost. The full contact between the first support frame and the second support frame and the concrete can significantly improve the bearing capacity and bending resistance of the beam, thereby achieving higher safety and reliability in various construction applications, and is suitable for a variety of complex engineering environments. Through the coordination of the anchor rod, the expansion sleeve and the conical head, when the expansion sleeve and the conical head are placed in the installation hole, when the anchor rod is tightened, the outside of the expansion sleeve will expand outward and tightly grasp the concrete, so that the anchor system is more stable when subjected to tension, and the conical head is used to promote expansion.

[0004] The utility model also provides the above-mentioned prefabricated channel-shaped steel-concrete composite beam, comprising: a U-shaped channel steel, an inner bottom surface of the U-shaped channel steel being fixedly connected to a support base, an upper surface of the support base being fixedly connected to a first support frame and a second support frame, the first support frame and the second support frame being both X-shaped, the first support frame being arranged in the direction of the long axis of the U-shaped channel steel, the first support frame in the middle of the U-shaped channel steel being relatively dense, the first support frames distributed at both ends of the long axis of the U-shaped channel steel being relatively sparse, the second support frame being arranged in the direction of the short axis of the U-shaped channel steel, and being distributed perpendicularly to the first support frame; the interior of the U-shaped channel steel is filled with concrete, a mounting hole is provided on the concrete, the mounting hole passes through one side of the U-shaped channel steel, an expansion sleeve is excessively fitted inside the mounting hole, a conical head is provided on the expansion sleeve, a threaded hole is provided inside the expansion sleeve, an anchor rod is threadedly connected inside the threaded hole, the other end of the anchor rod is located on the outer side of the U-shaped channel steel, and a washer and a fastening nut are provided on the anchor rod. Through the above device, through the cooperation of the first support frame and the second support frame, efficient bearing capacity and excellent stability are provided, and through the cooperation of the anchor rod, the expansion sleeve and the conical head, the stability, durability and safety of the overall structure are improved.

[0005] Furthermore, the first support frame is located in the middle of the long axis of the U-shaped channel steel, and the second support frame is located in the middle of the short axis of the U-shaped channel steel. Through the above device, the material is adjusted according to the position relationship and the bending moment, thereby saving materials.

[0006] Furthermore, the support base is fixedly connected to the inner bottom surface of the U-shaped channel steel by welding, and the support base is located on the bottom surfaces of both sides of the first support frame. Through the above device, by welding, it is ensured that the support structure will not loosen or move when bearing heavy loads.

[0007] Furthermore, the number of the first support frames is twenty-one, and the number of the second support frames is eight. Through the above device, multiple first support frames and second support frames are provided, which effectively improves stability.

[0008] Furthermore, the concrete is completely wrapped around the first support frame and the second support frame, and the surfaces of the first support frame and the second support frame are coated with an adhesion promoter. Through the above device, the support structure is completely wrapped by concrete to ensure uniform force transmission and increase the overall continuity of the beam.

[0009] Furthermore, the number of the mounting holes is four, and the mounting holes are located on both sides of the U-shaped channel steel. Through the above device, the concrete is completely fixed through multiple mounting holes, thereby improving the bearing capacity and stability.

[0010] Further, the conical head faces the bottom of the mounting hole, and the material of the conical head is alloy steel. Through the above device, the conical head is used to promote expansion.

[0011] Furthermore, the washer and the fastening nut are both located outside the U-shaped channel steel, the washer fits with the outer surface of the U-shaped channel steel, and the fastening nut fits with the washer. Through the above device, the washer helps to disperse the pressure applied by the fastening nut through the washer and the fastening nut, and the fastening nut ensures that the anchor system is stably fixed in the desired position.

[0012] Beneficial Effects

[0013] 1. Compared with the prior art, the prefabricated trough-shaped steel-concrete composite beam can cope with the maximum bending moment that the middle part may bear through the coordination of the distribution of the first support frame and the second support frame, and the bending moment in the two end areas is smaller, thereby saving material usage and cost. The full contact between the first support frame and the second support frame and the concrete can significantly improve the bearing capacity and bending resistance of the beam, thereby achieving higher safety and reliability in various construction applications, and is suitable for a variety of complex engineering environments.

[0014] 2. Compared with the prior art, the prefabricated trough-shaped steel-concrete composite beam is used, through the cooperation of anchor rod, expansion sleeve and conical head. When the expansion sleeve and conical head are put into the installation hole, when the anchor rod is tightened, the outside of the expansion sleeve will expand outward, tightly grasp the concrete, so that the anchoring system is more stable when subjected to tension, and the conical head is used to promote expansion. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0016] Figure 1 This is the front view of the prefabricated channel-shaped steel-concrete composite beam of the utility model;

[0017] Figure 2 The utility model is a prefabricated channel steel-concrete composite beam Figure 1 Middle transverse section view;

[0018] Figure 3 The utility model is a prefabricated channel steel-concrete composite beam Figure 1 Middle vertical section view;

[0019] Figure 4 The utility model is a prefabricated channel steel-concrete composite beam Figure 2 Enlarged view of point A in the middle.

[0020] Legend:

[0021] 1. U-shaped channel steel; 2. Concrete; 3. First support frame; 4. Second support frame; 5. Mounting hole; 6. Conical head; 7. Expansion sleeve; 8. Threaded hole; 9. Anchor rod; 10. Fastening nut; 11. Washer; 12. Support base. DETAILED DESCRIPTION

[0022] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0023] Reference Figure 1-4 The utility model embodiment prefabricated channel steel-concrete composite beam comprises: a U-shaped channel steel 1, the inner bottom surface of the U-shaped channel steel 1 is fixedly connected with a support base 12, the support base 12 fixes the first support frame 3 and the second support frame 4 to the inner bottom surface of the U-shaped channel steel 1, the support base 12 and the inner bottom surface of the U-shaped channel steel 1 are fixedly connected by welding, and the welding method ensures that the support structure will not loosen or move when bearing heavy loads, the support base 12 is located on the bottom surfaces of both sides of the first support frame 3, and the upper surface of the support base 12 is fixedly connected with the first support frame 3 and the second support frame 4, and the first support frame 3 and the second support frame 4 strengthen the prefabricated channel In order to improve the stability and bending resistance of the U-shaped steel-concrete composite beam, the number of the first support frames 3 is twenty-one, and the number of the second support frames 4 is eight. The first support frame 3 is located in the middle of the long axis of the U-shaped channel steel 1, and the second support frame 4 is located in the middle of the short axis of the U-shaped channel steel 1. The first support frame 3 and the second support frame 4 are both X-shaped. The first support frame 3 is arranged in the long axis direction of the U-shaped channel steel 1. The first support frames 3 in the middle of the U-shaped channel steel 1 are relatively dense, and the first support frames 3 distributed at both ends of the long axis of the U-shaped channel steel 1 are relatively sparse. The second support frames 4 are arranged in the short axis direction of the U-shaped channel steel 1 and are vertically distributed to the first support frames 3.

[0024] The U-shaped channel steel 1 is filled with concrete 2, which is completely wrapped around the first support frame 3 and the second support frame 4. The surfaces of the first support frame 3 and the second support frame 4 are coated with an adhesion promoter to increase the friction and adhesion area of ​​the first support frame 3 and the second support frame 4. The concrete 2 is provided with mounting holes 5. There are four mounting holes 5. The mounting holes 5 are located on both sides of the U-shaped channel steel 1. The mounting holes 5 pass through one side of the U-shaped channel steel 1. The mounting holes 5 are excessively fitted with expansion sleeves 7. The expansion sleeves 7 make it more stable when subjected to tension. The expansion sleeves 7 are provided with conical heads 6. The conical heads 6 to promote expansion, the conical head 6 faces the bottom of the mounting hole 5, the material of the conical head 6 is alloy steel, a threaded hole 8 is arranged inside the expansion sleeve 7, an anchor rod 9 is threadedly connected inside the threaded hole 8, the anchor rod 9 is firmly anchored in the expansion sleeve 7, the other end of the anchor rod 9 is located outside the U-shaped channel steel 1, a washer 11 and a fastening nut 10 are arranged on the anchor rod 9, the washer 11 and the fastening nut 10 ensure that the anchoring system is stably fixed in the required position, the washer 11 and the fastening nut 10 are both located outside the U-shaped channel steel 1, the washer 11 is in contact with the outer surface of the U-shaped channel steel 1, and the fastening nut 10 is in contact with the washer 11.

[0025] Working principle: When in use, the first support frame 3 and the second support frame 4 are in full contact with the concrete 2 to provide stability. Holes are drilled in the U-shaped channel steel 1 and the concrete 2, and the expansion sleeve 7 is inserted. The anchor rod 9 is screwed into the threaded hole 8, and then the washers 11 and 10 are inserted. The fastening nut 10 is tightened. The tightening action of the fastening nut 10 will pull the anchor rod 9 inward, thereby pushing the expansion sleeve 7 to expand outward and closely contact the hole wall to form a firm anchor.

[0026] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. Prefabricated channel steel-concrete composite beam, characterized in that: include: A U-shaped channel steel (1), wherein the inner bottom surface of the U-shaped channel steel (1) is fixedly connected to a support base (12), and the upper surface of the support base (12) is fixedly connected to a first support frame (3) and a second support frame (4), wherein the first support frame (3) and the second support frame (4) are both X-shaped, and the first support frame (3) is arranged in the direction of the long axis of the U-shaped channel steel (1), the first support frames (3) in the middle of the U-shaped channel steel (1) are relatively dense, and the first support frames (3) distributed at both ends of the long axis of the U-shaped channel steel (1) are relatively sparse, and the second support frame (4) is arranged in the direction of the short axis of the U-shaped channel steel (1) and is vertically distributed with the first support frame (3); The U-shaped channel steel (1) is filled with concrete (2), and a mounting hole (5) is provided on the concrete (2). The mounting hole (5) passes through one side of the U-shaped channel steel (1). An expansion sleeve (7) is provided inside the mounting hole (5). A conical head (6) is provided on the expansion sleeve (7). A threaded hole (8) is provided inside the expansion sleeve (7). An anchor rod (9) is threadedly connected inside the threaded hole (8). The other end of the anchor rod (9) is located outside the U-shaped channel steel (1). A washer (11) and a fastening nut (10) are provided on the anchor rod (9).

2. The prefabricated channel steel-concrete composite beam according to claim 1, characterized in that: The first support frame (3) is located in the middle of the long axis of the U-shaped channel steel (1), and the second support frame (4) is located in the middle of the short axis of the U-shaped channel steel (1).

3. The prefabricated channel steel-concrete composite beam according to claim 1, characterized in that: The support base (12) is fixedly connected to the inner bottom surface of the U-shaped channel steel (1) by welding, and the support base (12) is located on the bottom surfaces of both sides of the first support frame (3).

4. The prefabricated channel steel-concrete composite beam according to claim 1, characterized in that: The number of the first support frames (3) is twenty-one, and the number of the second support frames (4) is eight.

5. The prefabricated channel steel-concrete composite beam according to claim 1, characterized in that: The concrete (2) is completely wrapped on the first support frame (3) and the second support frame (4), and the surfaces of the first support frame (3) and the second support frame (4) are coated with an adhesion promoter.

6. The prefabricated channel steel-concrete composite beam according to claim 1, characterized in that: The number of the mounting holes (5) is four, and the mounting holes (5) are located on both sides of the U-shaped channel steel (1).

7. The prefabricated channel steel-concrete composite beam according to claim 1, characterized in that: The conical head (6) faces the bottom of the mounting hole (5), and the material of the conical head (6) is alloy steel.

8. The prefabricated channel steel-concrete composite beam according to claim 1, characterized in that: The washer (11) and the fastening nut (10) are both located outside the U-shaped channel steel (1); the washer (11) fits with the outer surface of the U-shaped channel steel (1); and the fastening nut (10) fits with the washer (11).

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