Prefabricated steel structure beam-column connection joint

Abstract

The application discloses an assembled steel structure beam-column connecting joint assembly, which comprises a connecting piece, wherein the connecting piece comprises a pipe part, the inside of the pipe part is provided with a connecting part of a cross beam, the connecting part has a gap with the inner wall part of the pipe part, and the pipe part is provided with a through hole; spherical shell supporting parts are arranged on both sides of the pipe part in pairs, the outer surface of the spherical shell supporting part is a spherical surface, and the spherical shell supporting part is provided with a strip-shaped hole extending from the top to the bottom; a second steel cable is fixed at one end on the connecting part and extends to the outside of the spherical shell supporting part through the through hole and the strip-shaped hole, a fixing part is fixed on the second steel cable, the fixing part is arranged to have a moving path which is located on the spherical surface of the spherical shell supporting part and takes the connecting point of the second steel cable on the connecting part as the center; and a supporting rod is arranged between the pipe part and the spherical shell supporting part, one end of the supporting rod is welded with a first steel cable and / or the pipe part and / or the spherical shell supporting part, one end of the supporting rod is fixed with the supporting rod, and the other end of the supporting rod is fixed with the connecting part.

Description

Technical Field

[0001] This invention belongs to the field of building technology, and in particular relates to prefabricated steel structure beam-column connection nodes. Background Technology

[0002] Prefabricated buildings are commonly used in factories due to their advantages such as rapid construction, lightweight construction, and good fire resistance and thermal insulation. Prefabricated buildings typically require a steel structure as the main frame, especially for columns and beams, and the steel structure joints need to be connected using prefabricated methods.

[0003] Traditional steel structures use welding or bolts for fixing, but these are all rigid connection structures. Such structures have poor seismic performance. When a strong earthquake occurs, brittle fractures are likely to occur at the connection points. Once a rigid connection point fractures, the beams will fall, and the columns will lose their support and are also prone to collapse, which is devastating to the entire factory building. Summary of the Invention

[0004] This invention addresses the problem of poor seismic resistance caused by rigid connections in the steel structure connection nodes of prefabricated buildings in existing technologies, and proposes the following technical solution:

[0005] A prefabricated steel structure beam-column connection node assembly for connecting the ends of columns and beams, including connectors disposed at the ends of the beams, the connectors comprising:

[0006] The tube has a connecting part in which a crossbeam is inserted, the connecting part has a gap with the inner wall of the tube, and the tube has a through hole;

[0007] Spherical shell support members are arranged in pairs on both sides of the tube. The outer surface of the spherical shell support member is spherical, and the spherical shell support member is provided with a strip-shaped hole extending from the top to the bottom.

[0008] The second steel cable has one end fixed to the connecting part and the other end extending to the outside of the spherical shell support through the through hole and the strip hole. The second steel cable is fixed with a fixing member. The moving path of the fixing member with the connection point of the second steel cable on the connecting part as the center is located on the spherical surface of the spherical shell support.

[0009] A support rod is disposed between the tube and the spherical shell support member, one end of which is welded to the tube and / or the spherical shell support member.

[0010] The first steel cable is fixed at one end to the support rod and at the other end to the connecting part.

[0011] Preferably, it also includes a wing plate, which is disposed at one end of the tube and is attached to the column and fixed by bolts.

[0012] Preferably, it also includes protective plates, which are arranged in pairs on the outer side wall of the tube, and a slide is formed between the protective plates to accommodate the spherical shell support.

[0013] Preferably, the strip-shaped hole includes a circular portion and a strip-shaped portion that are interconnected. The diameter of the circular portion is greater than the width of the strip-shaped portion. The circular portion is disposed at the lower part of the spherical shell support, and the strip-shaped portion extends toward the top of the spherical shell support. The size of the fixing member is between the circular portion and the strip-shaped portion.

[0014] Preferably, a vertical plate is welded to the outer side of the pipe, and the vertical plate is also welded and fixed to the connecting part.

[0015] Preferably, the vertical plate is pre-welded onto the pipe section.

[0016] The assembly method for the above-mentioned prefabricated steel structure beam-column connection node components is as follows:

[0017] Insert the connecting part into the tube, and pass the first and second steel cables through the through hole to extend them out of the tube;

[0018] Adjust the position of the connecting parts, and weld the upright plate, connecting parts, and pipe parts;

[0019] Tighten and secure the first steel cable to the support rod;

[0020] Place the spherical shell support between the protective plates and pass the second steel cable through the strip hole until the spherical shell support contacts the support rod. Move the fixing piece to the top of the strip hole, pre-tighten and straighten the second steel cable, and fix the fixing piece to the outside of the second steel cable.

[0021] The beneficial effects of this invention are as follows: the columns and beams have both rigid and flexible connection structures. In the event of an earthquake, the strong destructive force of the earthquake breaks the rigid connection structure, triggering the release of the flexible connection between the columns and beams. This allows the beams to have a 360° range of motion within the connector, ensuring that the columns and beams remain connected. This provides continued support to the columns to a certain extent, maintaining their uprightness and thus preventing the overall collapse of the factory building. Attached Figure Description

[0022] Figure 1 The diagram shown is a structural schematic of a steel structure connection node;

[0023] Figure 2 The diagram shown is a structural schematic of the connector;

[0024] Figure 3 What is shown is Figure 2 A magnified view of a section at point A in the middle;

[0025] Figure 4 The diagram shows a structural schematic of the connection between the column and the beam via connectors. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0027] Figure 1 The diagram shows a structural schematic of a steel structure connection node, which includes interconnected columns 10 and beams 20. Columns 10 refer to steel columns that are usually vertical or nearly vertical. In buildings, they are typically perpendicular to the ground, and if they are inclined, they are slightly inclined, usually at an angle not exceeding 15 degrees. Columns include, but are not limited to, I-beams, square steel, and channel steel. Beams 20 refer to steel columns that are usually horizontal, including, but are not limited to, I-beams, square steel, and channel steel.

[0028] The following detailed explanation uses the example of column 10 being an I-beam and beam 20 being a square steel beam.

[0029] Figure 1 In the middle, the column 10 and the crossbeam 20 are connected to each other by the connector 30. The connector 30 is usually pre-fixed to the column flange 11 of the column 10. The connector 30 and the column 10 can be fixed by conventional bolts 12. The connector 30 and the crossbeam 20 are connected and fixed by mutual insertion and matching of the specific structure of the connector 30.

[0030] Figure 2 The diagram shown is a structural schematic of the connector 30. Figure 3 What is shown is Figure 2 The enlarged view at point A shows that the connector 30 includes a tube 31, a wing plate 32, a protective plate 33, a spherical support 34, a support rod 35, a first steel cable 36 and a second steel cable 37, and a fixing member 38. The tube 31 is adjustable according to the cross-sectional shape of the crossbeam 20. In this embodiment, the tube 31 is a square tube corresponding to square steel. The wing plate 32 is located at one end of the tube 31 and is symmetrically arranged. The wing plate 32 is on the same plane as the crossbeam 20 and has a connecting hole. The column 10 also has a connecting hole. The bolt 12 fixes the connector 30 to the side wall of the column 10 through the connecting hole.

[0031] The protective plate 33 is provided on the side wall of the forming tube 31, and the protective plates 33 are provided in pairs. The protective plates 33 are perpendicular to the side wall of the tube 31, and a slide is formed between the two pairs of protective plates 33. The spherical shell support member 34 is movably arranged in the slide. A support rod 35 is also provided on the side wall of the tube 31. The support rod 35 is arranged in the slide and plays a supporting and limiting role for the spherical shell support member 34.

[0032] The spherical shell support 34 is a hemispherical shell. Several strip-shaped holes are provided on the shell surface of the spherical shell support 34. The strip-shaped holes include a circular part 342 and a strip-shaped part 341. The circular part 342 and the strip-shaped part 341 are interconnected. The diameter of the circular part 342 is larger than the width of the strip-shaped part 341. The circular part 342 is located at the lower part of the spherical shell support 34. The strip-shaped part 341 extends toward the top of the spherical shell support 34. A through hole 311 is provided on the side wall of the tube part 31. One end of the second steel cable 37 is fixed to the crossbeam 20, and then passes through the through hole 311 and the strip-shaped hole in sequence before extending out. The fixing member 38 is fixed to the second steel cable 37 on the outside of the spherical shell support 34. One end of the first steel cable 36 is fixed to the support rod 35, and the other end passes through the through hole 311 and is also fixed to the crossbeam 20.

[0033] The number and position of the strip holes, the second steel cable 37, and the fasteners 38 are corresponding. In this embodiment, four strip holes are provided and arranged in a cross-shaped symmetrical manner to ensure that each second steel cable 37 is subjected to balanced force. However, it is not limited to providing four; there can also be two, three, or even more.

[0034] The function of the fastener 38 is to straighten and keep the second steel cable 37 taut. Its specific structure can adopt any component in the prior art that can achieve this function, such as a cable connection structure. However, the minimum size of the fastener 38 needs to be greater than the width of the strip portion 341 and the maximum size needs to be smaller than the circular portion 342 so that the fastener 38 can slide out of the strip hole.

[0035] The bottom of the spherical shell support 34 has a base 343, the shape of which is consistent with the slide formed by the guard plate 33. In this embodiment, it is defined as rectangular so that the spherical shell support 34 can slide stably in the slide. The guard plates 33 on both sides of the slide provide lateral support and limit the spherical shell support 34 inside. The support rods 35 are arranged at the four corners of the slide to achieve stable support for the spherical shell support 34.

[0036] In this embodiment, four strip holes are provided and arranged in a cross-shaped symmetrical manner, so the through hole 311 is also set as a cross hole.

[0037] Figure 4 The diagram shows a structural schematic of the connection between the column 10 and the crossbeam 20 via the connector 30. The end of the crossbeam 20 has a connecting part 22, which is inserted into the tube 31. The cross section of the connecting part 22 is smaller than the inner cavity of the tube 31, that is, the width of the end section of the connecting part 22 is smaller than that of the tube 31, and the height is also smaller than that of the tube 31, so that there is still a movable gap between the two after the connecting part 22 is inserted into the tube 31.

[0038] A vertical plate 21 is fixed on the side wall of the connecting part 22. The vertical plate 21 is welded to the connecting part 22, and the vertical plate 21 is also welded to the end face of the pipe part 31. The main function of the vertical plate 21 is to assist in fixing the column 10 and the crossbeam 20, and to ensure the connection stability of the column 10 and the crossbeam 20 under normal conditions.

[0039] The assembly method of the steel structure connection node of the present invention is as follows:

[0040] Step 1: Fix column 10 to the foundation;

[0041] The second step is to fix the connector 30 to the column 10 with bolts 12. There is no clear order between the first and second steps.

[0042] The third step is to insert the connecting part 22 into the tube 31 of the connector 30. A vertical plate 21 is pre-welded to the end face of the tube 31. The vertical plate 21 can provide auxiliary positioning and support for the connecting part 22, so as to make the connecting part 22 stable in the tube 31. Before inserting the connecting part 22 into the tube 31 of the connector 30, the first steel cable 36 and the second steel cable 37 fixed on the connecting part 22 need to be extended out of the tube 31 through the through hole 311.

[0043] Fourth step: After inserting the connecting part 22 into the pipe part 31 and adjusting it to a suitable position, weld the vertical plate 21 to the connecting part 22 to maintain the stability of the crossbeam 20. Then fix the first steel cable 36 to the support rod 35 and keep the first steel cable 36 taut. The support rod 35 is pre-welded to the outer wall of the pipe part 31. The support rod 35 and the pipe part 31 are spot welded, and the support rod 35 is kept perpendicular to the outer wall of the pipe part 31.

[0044] Fourth step: Place the spherical shell support 34 between the protective plates 33 and pass the second steel cable 37 through the strip hole until the spherical shell support 34 contacts the support rod 35. Then move the fixing member 38 to the top of the strip hole, pre-tighten and straighten the second steel cable 37, and fix the fixing member 38 to the outside of the second steel cable 37.

[0045] The steel structure connection node of the present invention adopts a connection form that combines rigid connection and flexible connection. The flexible connection is the main connection structure, and the rigid connection is used for auxiliary fixation and condition triggering. In the normal state, the support rod 35 supports the spherical shell support member 34. The spherical shell support member 34 cooperates with the fixing member 38 through the second steel cable 37 to straighten and tighten the second steel cable 37, so that the connection part 22 is tightened and fixed under the joint action of the second steel cable 37 at the upper and lower ends. The upright plate 21 is used for auxiliary fixation during and after installation, so that the column 10 and the beam 20 are further fixed in the normal state. In normal conditions, the support rod 35 supports the spherical shell support 34, ensuring that the spherical surface of the spherical shell support 34 is the same as the surface formed by the movable point of the fixing member 38. In other words, when the fixing member 38 rotates about the other end of the second steel cable 37 as the center of the sphere, it is always located on the spherical surface of the spherical shell support 34, while the second steel cable 37 is taut. The friction between the fixing member 38 and the spherical shell support 34 is sufficient to resist the sliding of the fixing member 38, thereby keeping the crossbeam 20 taut and fixed.

[0046] During an earthquake, strong relative movement occurs between the column 10 and the beam 20, initially damaging the welded joints between the vertical plate 21, the column 10, and the beam 20. During this process, the column 10 and beam 20 undergo relative movement, causing the beam 20 to pull on the first steel cable 36 and the second steel cable 37. However, the connection at both ends of the second steel cable 37 is more stable, while the support rod 35 connected to one end of the first steel cable 36 is fixed to the outer wall of the pipe 31 by spot welding. When the tensile strength is sufficient, this spot weld will break, causing the support rod 35 to bend or even tilt, reducing the distance between the outer spherical surface of the spherical support member 34 and the connecting member 30. The small size disrupts the spherical positional relationship between the fixing member 38 of the second steel cable 37 and the connection point of the second steel cable 37 on the crossbeam 20. The second steel cable 37 becomes slack, and the fixing member 38 slides down from the top of the slot and out from the bottom circular part 342 of the slot. The connecting part 22 then has a 360° range of motion within the connecting member 30, thus ensuring that in an earthquake, the destructive force of the earthquake prevents the column 10 and the crossbeam 20 from rigidly breaking. The column 10 and the crossbeam 20 remain connected, providing support to the column 10 to a certain extent and maintaining its uprightness, thereby preventing the overall catastrophic collapse of the factory building.

[0047] It should be noted that the connection structure of the present invention is applied to both ends of the crossbeam 20.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A prefabricated steel structure beam-column connection node assembly, used to connect the ends of columns and beams, characterized in that, Includes a connector disposed at the end of the crossbeam, the connector comprising: The tube has a connecting part in which a crossbeam is inserted, the connecting part has a gap with the inner wall of the tube, and the tube has a through hole; Spherical shell support members are arranged in pairs on both sides of the tube. The outer surface of the spherical shell support member is spherical, and the spherical shell support member is provided with a strip-shaped hole extending from the top to the bottom. The second steel cable has one end fixed to the connecting part and the other end extending to the outside of the spherical shell support through the through hole and the strip hole. The second steel cable is fixed with a fixing member. The moving path of the fixing member with the connection point of the second steel cable on the connecting part as the center is located on the spherical surface of the spherical shell support. A support rod is disposed between the tube and the spherical shell support member, and one end of the support rod is welded to the tube and / or the spherical shell support member; The first steel cable is fixed at one end to the support rod and at the other end to the connecting part; The strip-shaped hole includes a circular portion and a strip-shaped portion that are interconnected. The diameter of the circular portion is greater than the width of the strip-shaped portion. The circular portion is located at the lower part of the spherical shell support, and the strip-shaped portion extends toward the top of the spherical shell support. The size of the fixing member is between the circular portion and the strip-shaped portion.

2. The prefabricated steel structure beam-column connection node assembly according to claim 1, characterized in that, It also includes a wing plate, which is disposed at one end of the tube and is attached to the column and fixed by bolts.

3. The prefabricated steel structure beam-column connection node assembly according to claim 1, characterized in that, It also includes protective plates, which are arranged in pairs on the outer wall of the tube, and a slide is formed between the protective plates to accommodate the spherical shell support.

4. The prefabricated steel structure beam-column connection node assembly according to claim 1, characterized in that, A vertical plate is welded to the outside of the pipe, and the vertical plate is also welded and fixed to the connecting part.

5. The prefabricated steel structure beam-column connection node assembly according to claim 4, characterized in that, The vertical plate is pre-welded onto the pipe section.

6. The prefabricated steel structure beam-column connection node assembly according to any one of claims 1 to 5, characterized in that, The assembly method of the prefabricated steel structure beam-column connection node component is as follows: Insert the connecting part into the tube, and pass the first and second steel cables through the through hole to extend them out of the tube; Adjust the position of the connecting part, and weld the upright plate, connecting part, and pipe part; Tighten and secure the first steel cable to the support rod; Place the spherical shell support between the protective plates and pass the second steel cable through the strip hole until the spherical shell support contacts the support rod. Move the fixing piece to the top of the strip hole, pre-tighten and straighten the second steel cable, and fix the fixing piece to the outside of the second steel cable.

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