Prefabricated assembled special-shaped column structure beam-column node and manufacturing method thereof

Abstract

The present invention relates to a prefabricated, assembled beam-column joint with a special-shaped column structure, comprising a prefabricated joint assembly, a prefabricated special-shaped column, and a prefabricated rectangular beam. The prefabricated joint assembly comprises a special-shaped column region, a node core region having a rectangular cross-section, a beam region, a rectangular column region having a rectangular cross-section, a first beam-end steel member fixedly connected to the end of the beam region, and a first column-end steel member fixedly connected to the end of the rectangular column region; a second beam-end steel member fixedly connected to the end of the prefabricated rectangular beam, and a second column-end steel member fixedly connected to the end of the prefabricated special-shaped column; the prefabricated joint assembly is fixedly connected to the prefabricated rectangular beam via the first beam-end steel member and the second beam-end steel member; and the prefabricated joint assembly is fixedly connected to the prefabricated special-shaped column via the first column-end steel member and the second column-end steel member. The present invention also provides a method for manufacturing such a joint.

Description

Technical Field

[0001] The present invention belongs to the technical field of reinforced concrete building structures, and relates to a prefabricated assembled reinforced concrete special-shaped column structure beam-column node. Background Art

[0002] The beam-column joint of a reinforced concrete frame structure is a weak link in the structure's seismic resistance. Good joint performance is essential for ensuring the concrete structure's excellent seismic performance. Domestic and international literature indicates that under external loads, beam-column joints with special-shaped columns are subjected to unfavorable stress conditions, including axial force, shear force, and bending moment, and the core area of the joint is subject to complex stresses. Using prefabricated, integral special-shaped column joints presents challenges such as complex construction, a low degree of assembly, and a long construction period. To address these issues, prefabricated and assembled connection methods can be used for special-shaped column joints to ensure the good material properties of the prefabricated components. By designing a reasonable prefabricated component form and a reliable connection method, the ease of prefabricated component connection and the seismic performance of the joint can be ensured. Therefore, there is an urgent need to develop new connection methods for prefabricated and assembled beam-column joints in special-shaped column structures to improve their seismic performance and ensure the effective application of prefabricated and assembled connections. Summary of the Invention

[0003] The purpose of the present invention is to provide a novel method for connecting beam-column joints in prefabricated, assembled, special-shaped column structures with excellent seismic resistance. The method utilizes a rationally designed prefabricated concrete component and pre-embeds steel components at the ends of the prefabricated components. The prefabricated components can be reliably assembled simply by connecting them with externally welded steel plates and butt welding. To address the above technical issues, the present invention employs the following technical solutions:

[0004] A prefabricated and assembled special-shaped column structure beam-column node, comprising a prefabricated node composite component, a prefabricated special-shaped column and a prefabricated rectangular beam, characterized in that the prefabricated node composite component comprises a special-shaped column area, a node core area including a rectangular cross-section, a beam area with a length that is one times the height of the beam cross-section, a rectangular column area with a rectangular cross-section and a length that is one times the height of the column cross-section, a first beam-end steel component fixedly connected to the end of the beam area, and a first column-end steel component fixedly connected to the end of the rectangular column area; a second beam-end steel component is fixedly connected to the end of the prefabricated rectangular beam, and a second column-end steel component is fixedly connected to the end of the prefabricated special-shaped column; the prefabricated node composite component is fixedly connected to the prefabricated rectangular beam by the first beam-end steel component and the second beam-end steel component; the prefabricated node composite component is fixedly connected to the prefabricated special-shaped column by the first column-end steel component and the second column-end steel component.

[0005] Furthermore, the first beam-end steel member and the second beam-end steel member have the same structure, comprising three U-shaped steel plates with anchor bars installed inside. The first column-end steel member and the second column-end steel member have the same structure, comprising multiple connected steel plates, one of which is fixed to the end face of the prefabricated special-shaped column or special-shaped column area, and the others are fixed to the side faces of the end of the prefabricated special-shaped column or special-shaped column area.

[0006] The present invention also provides a method for manufacturing the prefabricated assembled special-shaped column structure beam-column node, which includes the following steps:

[0007] (1) Making a prefabricated node composite component: fixing the first beam end steel component and the first column end steel component at a predetermined position, then tying the steel bars, supporting the formwork and pouring the concrete, and integrally pouring the node core area, the beam area 1-2 rectangular column area and the special-shaped column area in the prefabricated node composite component;

[0008] (2) When making prefabricated rectangular beams and prefabricated special-shaped columns, the second beam end steel member and the second column end steel member are fixed at predetermined positions, and then the steel bars are tied, the formwork is supported, and concrete is poured to complete the production of the prefabricated rectangular beams and prefabricated special-shaped columns;

[0009] (3) Hoist the prefabricated node assembly components into place and secure them;

[0010] (4) Connect the beam ends. Lift the prefabricated rectangular beam and connect the second beam end steel member to the first beam end steel member of the prefabricated node assembly member flush with each other. First, weld two steel plates on the upper and lower surfaces of the connection between the two beam end steel members. Then, butt weld the remaining connection points of the two beam end steel members.

[0011] (5) Connect the column ends. Lift the prefabricated special-shaped column and connect its second column end steel member flush with the first column end steel member of the prefabricated node composite member. First, weld four steel plates on the four sides of the connection between the two column end steel members. Then, the remaining connection points of the two column end steel members can be butt-welded.

[0012] Compared with existing connection technologies, the present invention has the following beneficial effects: In the prefabricated and assembled special-shaped column structure beam-column node connection method provided by the present invention, the prefabricated node composite component adopts a rectangular cross-section in the node core area and the connection area (beam area, rectangular column area), and the assembly position of the column end and the beam end is selected to be outside the node core area, which greatly increases the area of the node core area. This can overcome the problem of weak seismic performance of the core area of the beam-column node of traditional special-shaped columns, ensure the integrity of the node core area and the seismic resistance requirement of "strong node and weak component"; in the assembly connection, steel components are embedded at the ends of the prefabricated components, and the connection method of butt welding the external welded steel plate to the steel component is used to ensure the reliability of the node assembly connection under seismic loads, and the seismic performance is close to that of integral casting. The node is assembled on-site using prefabricated components, with a high degree of assembly, simple structure, and convenient construction, which can significantly shorten the construction period and provide a new design method for the development of prefabricated and assembled connection of beam-column nodes of special-shaped columns. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall assembly connection of the present invention;

[0014] Figure 2 This is a schematic diagram of the decomposition of the prefabricated node assembly component of the present invention;

[0015] Figure 3 This is an exploded schematic diagram of the prefabricated rectangular beam of the present invention;

[0016] Figure 4 This is a schematic diagram of the decomposition of the prefabricated special-shaped column of the present invention;

[0017] Figure 5 It is a schematic diagram of the beam end steel member of the present invention;

[0018] Figure 6 It is a schematic diagram of the column end steel member of the present invention;

[0019] Figure 7 A top view of the beam assembly connection of the present invention;

[0020] Figure 8 This is a front view of the column assembly connection of the present invention;

[0021] Figure 9 This is an overall assembly effect diagram of the present invention;

[0022] In the figure: 1-prefabricated node composite component, 1-1 node core area, 1-2 beam area, 1-3 rectangular column area, 1-4 special-shaped column area, 1-5 first beam end steel member, 1-6 first column end steel member; 2-prefabricated rectangular beam, 2-1 concrete beam, 2-2 second beam end steel member; 3-prefabricated special-shaped column, 3-1 concrete column, 3-2 second column end steel member; 4-beam external welded steel plate; 5-column external welded steel plate. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0024] like Figure 1 As shown, the prefabricated assembled special-shaped column structure beam-column node connection method of this embodiment is used for the assembled connection between the prefabricated node composite component 1, the prefabricated rectangular beam 2 and the prefabricated special-shaped column 3, and the connection is achieved by using the beam external welded steel plate 4 and the column external welded steel plate 5. The steel components are embedded in the connection ends of the prefabricated node composite component 1, the prefabricated rectangular beam 2 and the prefabricated special-shaped column 3, and the connection method is as follows: at a height of one times the beam section outside the core area of the node, two beam external welded steel plates 4 are used to connect the prefabricated node composite component 1 and the prefabricated rectangular beam 2; at a height of one times the column section outside the core area of the node, four column external welded steel plates 5 are used to connect the prefabricated node composite component 1 and the prefabricated special-shaped column 3; after the steel plate welding is completed, the remaining butt joints of the steel components can be butt-welded.

[0025] like Figure 2 As shown, the prefabricated joint assembly 1 includes a joint core region 1-1 with a rectangular cross-section, a beam region 1-2 with a length equal to one beam cross-section height, a rectangular column region 1-3 with a rectangular cross-section and a length equal to one column cross-section height, a special-shaped column region 1-4, a first beam end steel member 1-5 embedded in the ends of the beam region, and a first column end steel member 1-6 embedded in the ends of the rectangular column region. The side length of the rectangular column cross-section is the same as the height of the special-shaped column limb.

[0026] like Figure 3 As shown, the prefabricated rectangular beam 2 includes a concrete beam 2-1 and a second beam end steel member 2-2.

[0027] like Figure 4 As shown, the prefabricated special-shaped column 3 includes a concrete column 3-1 and a second column end steel member 3-2. To facilitate connection, the concrete column 3-1 adopts a rectangular cross-section in the area where the column end steel member 3-2 is embedded, and the rest of the area is a special-shaped column.

[0028] When manufacturing a prefabricated node assembly component 1, the first beam end steel member 1-5 and the first column end steel member 1-6 are first fixed in a predetermined position, followed by tying the steel bars, supporting the formwork, and pouring concrete to complete the production of the prefabricated concrete component. The node core area 1-1, beam area 1-2, rectangular column area 1-3, and special-shaped column area 1-4 within the prefabricated node assembly component 1 are cast as a whole. Similarly, when manufacturing the prefabricated rectangular beam 2 and prefabricated special-shaped column 3, the second beam end steel member 2-2 and the second column end steel member 3-2 are first fixed in a predetermined position, followed by tying the steel bars, supporting the formwork, and pouring concrete to complete the production of the prefabricated concrete component.

[0029] like Figure 5 As shown, the first beam end steel member 1-5 and the second beam end steel member 2-2 adopt the same structure, which is welded by three steel plates and welded with anchor bars inside. This steel member is embedded in the end of the beam. Figure 6 As shown, the first column end steel member 1-6 and the second column end steel member 3-2 adopt the same structure, which is welded by 5 steel plates and has anchor bars welded inside. This steel member is pre-buried at the end of the column.

[0030] like Figure 7 、 Figure 8 As shown, on the connecting plane between the steel plates and the steel members, the length and width of the beam external welded steel plate 4 should not exceed the dimensions of the plane where the first beam-end steel member 1-5 and the second beam-end steel member 2-2 meet. The length and width of the column external welded steel plate 5 should not exceed the dimensions of the plane where the first column-end steel member 1-6 and the second column-end steel member 3-2 meet. To facilitate welding between the steel plates and the steel members, sufficient welding space should be reserved when designing the external welded steel plate. The thickness of the external welded steel plate should not exceed the thickness of the steel plate used for the end steel members.

[0031] The working method of the present invention is as follows: in the assembled connection of the beam-column node of the special-shaped column structure, the first step is to hoist the prefabricated node composite component 1 into place and fix it; the second step is to connect the beam ends, hoist the prefabricated rectangular beam 2, and connect its second beam-end steel component 2-2 flush with the first beam-end steel component 1-5 of the prefabricated node composite component 1, first weld two steel plates 4 on the upper and lower surfaces of the connection between the two beam-end steel components, and then butt-weld the remaining butt joints of the two beam-end steel components; the third step is to connect the column ends, hoist the prefabricated special-shaped column 3, and connect its second column-end steel component 3-2 flush with the first column-end steel component 1-6 of the prefabricated node composite component 1, first weld four steel plates 5 on the four sides of the connection between the two column-end steel components, and then butt-weld the remaining butt joints of the two column-end steel components. At this point, the assembled connection of the beam and column at the node is completed, and after docking, Figure 9 shown.

[0032] The present invention is not limited to the embodiments described above. The preferred embodiments described above are merely illustrative of the technical solutions of the present invention and are intended to be illustrative only and not exhaustive. All other embodiments derived by those skilled in the art without departing from the spirit and scope of the present invention and the claims shall fall within the scope of protection of the present invention.

Claims

1. A prefabricated assembled special-shaped column structure beam-column node, comprising a prefabricated node assembly component, a prefabricated special-shaped column and a prefabricated rectangular beam, characterized in that: The prefabricated node composite component includes a special-shaped column area, a node core area with a rectangular cross-section, a beam area with a length that is one time the height of the beam cross-section, a rectangular column area with a rectangular cross-section and a length that is one time the height of the column cross-section, a first beam end steel member fixedly connected to the end of the beam area, and a first column end steel member fixedly connected to the end of the rectangular column area; the prefabricated rectangular beam includes a concrete beam and a second beam end steel member; the second beam end steel member is fixedly connected to the end of the prefabricated rectangular beam; the prefabricated special-shaped column includes a concrete column and a second column end steel member, in the area where the second column end steel member is embedded, the concrete column adopts a rectangular cross-section, and the rest of the area is a special-shaped column; the second column end steel member is fixedly connected to the end of the prefabricated special-shaped column; the prefabricated node composite component is fixedly connected to the prefabricated rectangular beam through the first beam end steel member and the second beam end steel member; the prefabricated node composite component is fixedly connected to the prefabricated special-shaped column through the first column end steel member and the second column end steel member The components are fixedly connected; the first beam end steel component and the second beam end steel component have the same structure, including three steel plates connected into a U shape, with anchor bars arranged inside; the first column end steel component and the second column end steel component have the same structure, including multiple connected steel plates, one of which is fixed to the end face of the prefabricated special-shaped column or the special-shaped column area, and the other plates are fixed to the various side faces of the end of the prefabricated special-shaped column or the special-shaped column area; to connect the beam ends, lift the prefabricated rectangular beam, and connect its second beam end steel component to the first beam end steel component of the prefabricated node composite component flush, first weld two steel plates on the upper and lower surfaces of the connection between the two beam end steel components, and then butt weld the remaining butt joints of the two beam end steel components; to connect the column ends, lift the prefabricated special-shaped column, and connect its second column end steel component to the first column end steel component of the prefabricated node composite component flush, first weld four steel plates on the four sides of the connection between the two column end steel components, and then butt weld the remaining butt joints of the two column end steel components.

2. The method for manufacturing the prefabricated and assembled special-shaped column structure beam-column joint according to claim 1 comprises the following steps: (1) Making a prefabricated node assembly component: fixing the first beam end steel component and the first column end steel component at a predetermined position, then tying the steel bars, supporting the formwork and pouring the concrete, and integrally pouring the node core area, beam area, rectangular column area and special-shaped column area in the prefabricated node assembly component; (2) When making prefabricated rectangular beams and prefabricated special-shaped columns, the second beam end steel member and the second column end steel member are fixed at predetermined positions, and then the steel bars are tied, the formwork is supported, and concrete is poured to complete the production of the prefabricated rectangular beams and prefabricated special-shaped columns; (3) Hoist the prefabricated node assembly components into place and secure them; (4) Connect the beam ends. Lift the prefabricated rectangular beam and connect the second beam end steel member to the first beam end steel member of the prefabricated node assembly member flush with each other. First, weld two steel plates on the upper and lower surfaces of the connection between the two beam end steel members, and then butt weld the remaining connection points of the two beam end steel members. (5) Carry out the column end connection, lift the prefabricated special-shaped column, and connect its second column end steel member with the first column end steel member of the prefabricated node composite member flush, first weld four steel plates on the four sides of the connection between the two column end steel members, and then butt weld the remaining connection points of the two column end steel members.

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