Connection of primary and secondary beam nodes of prefabricated concrete frame structure

Abstract

The present invention relates to the connection of the main and secondary beam nodes of the assembled concrete frame structure; the load-bearing column is internally arranged with stress-bearing steel bars connected with the main beam, a beam connecting piece is pre-embedded in the middle of the main beam, and the pre-embedded beam connecting piece is fixed with the steel cage inside the main beam; U-shaped connecting pieces are pre-embedded at the left and right ends of the secondary beam, and a concave connecting plate is fixed with the beam connecting piece through bolt connection to connect the main beam with the secondary beam; the lower end and the left and right ends of the prefabricated shear wall are arranged with protruding steel bars on the wall; the prefabricated shear wall is connected with the load-bearing column and the main beam through the protruding steel bars on the wall. The present invention has a high degree of assembly, convenient construction and installation, less wet operation, excellent stress performance, and clear force transmission; while ensuring the rigidity of the concrete frame structure, it is convenient for mass production and on-site assembly, thereby improving on-site construction efficiency.

Description

Technical Field

[0001] The invention relates to a primary and secondary beam node connection of an assembled concrete frame structure, and belongs to the technical field of building industrialization and assembled concrete frame structure construction. Background Art

[0002] Prefabricated structures can save energy, water, and materials, significantly reduce construction waste, reduce noise pollution, reduce labor and intensity, effectively improve the construction environment, and improve project quality. They are structures worthy of vigorous promotion. Prefabricated frame shear wall structure is one of the most important structural forms, and is currently being vigorously developed at home and abroad. However, how to ensure the safety of prefabricated structures under strong earthquakes is a challenging problem. The difficulty lies in how to ensure the reliability and convenience of the connection between prefabricated structural modules, and how to enhance the stability of prefabricated structures. Although some of the current prefabricated shear walls can achieve reliability and convenience of connection through various construction methods, most of them have poor reliability and convenience, and it is difficult to effectively ensure the safety of the structure under strong earthquakes. Therefore, the research and development of primary and secondary beam node connections for prefabricated concrete frame structures is both urgent and particularly meaningful. Summary of the invention

[0003] In order to solve the above-mentioned technical problems, such as poor connection reliability and poor stability, the present invention provides a primary and secondary beam node connection of an assembled concrete frame structure.

[0004] The technical solution adopted by the present invention is as follows:

[0005] The connection between the main and secondary beam nodes of the prefabricated concrete frame structure includes load-bearing columns, main beams, prefabricated shear walls, beam connectors, bolts, connecting steel bars, vertical connecting steel bars, extended short bars on columns, steel cages, bolt holes, secondary beams, combined steel cages, and shear pads;

[0006] A steel cage is arranged inside the load-bearing column to connect with the main beam, and a row of short bars extending outward from the column are pre-embedded at the left and right ends of the load-bearing column; a steel cage is arranged inside the main beam, and a beam connecting piece is pre-embedded in the middle of the main beam, wherein: the pre-embedded beam connecting piece is fixed together with the steel cage inside the main beam, and concrete is poured together to prefabricate the main beam;

[0007] The U-shaped connecting pieces and the concave connecting plates are embedded in the left and right ends of the secondary beam and fixed together with the connecting pieces between beams through bolts to connect the main beam and the secondary beam;

[0008] The prefabricated shear wall is connected to the load-bearing column through vertical connecting steel bars; wherein the wall connecting steel bars arranged on the left and right sides of the prefabricated shear wall are overlapped with the outwardly extending short bars on the column and are bundled with iron wires to form a combined steel cage, and the vertical connecting steel bars pass through the combined steel cage and are bundled inside the combined steel cage with iron wires; concrete is poured at the connection between the prefabricated shear wall and the load-bearing column;

[0009] The precast shear wall is connected to the main beam through connecting steel bars, and concrete is poured at the connection between the precast shear wall and the main beam.

[0010] Further, the inter-beam connecting member is composed of an upper fixing plate, an upper fixing groove, a middle fixing groove, a lower fixing plate, an upper fixing groove, bolt holes and a connecting member body, wherein the two upper fixing plates surround an upper fixing groove and bolt holes are reserved at corresponding positions on the plates, and the two lower fixing plates surround a lower fixing groove and bolt holes are reserved at corresponding positions on the plates; the side view of the inter-beam connecting member is an I-shaped component, that is, the lower fixing groove extends farther than the upper fixing groove, and the upper fixing groove and the lower fixing groove surround a middle fixing groove.

[0011] Furthermore, the anti-shear pads are of two types: concave anti-shear pads and cross-shaped anti-shear pads; two concave anti-shear pads are arranged at the lower side of the upper fixing groove, and one cross-shaped anti-shear pad is arranged at the lower side of the lower fixing groove.

[0012] Furthermore, a protruding concrete tenon is prefabricated at the middle and upper positions of the left and right ends of the secondary beam, the lower side of the concrete tenon is a pre-embedded U-shaped connecting piece, and the upper side is a pre-embedded concave connecting plate, and the pre-embedded U-shaped connecting piece consists of a deep concave connecting plate and a short limb.

[0013] The secondary beam is further connected to the inter-beam connector by bolts; the concave connecting plate on the upper side of the secondary beam end is inserted into the upper fixing groove and fixed with bolts; the U-shaped connecting piece on the lower side of the secondary beam end is inserted into the lower fixing groove and fixed with bolts, and the short limb covers the upper side of the lower fixing plate; the concrete tenon in the middle of the secondary beam end is inserted into the middle fixing groove, and the middle concrete tenon covers the upper side of the short limb.

[0014] Furthermore, the lower fixing groove and the U-shaped connecting piece match the bolt hole positions reserved in the upper fixing groove and the concave-shaped connecting plate.

[0015] Furthermore, the combined steel cage and connecting steel bars at the connection between the prefabricated shear wall and the load-bearing column are formed into a concrete column by pouring concrete.

[0016] Furthermore, the inter-beam connecting member is a hollow member.

[0017] Beneficial effects of the present invention:

[0018] The present invention has a high degree of assembly, is convenient for construction and installation, requires less wet work, has excellent stress-bearing performance, and has clear force transmission. It ensures the rigidity of the concrete frame structure while facilitating mass production and on-site assembly, improves on-site construction efficiency, and effectively solves the problems of difficult assembly positioning and unreliable node connections in assembled connections, thereby ensuring the reliability of connections at the nodes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the connection structure of the main and secondary beam nodes of the prefabricated concrete frame structure;

[0020] Figure 2 This is the front view of the connection between the main and secondary beam nodes of the prefabricated concrete frame structure;

[0021] Figure 3 This is a schematic diagram of the load-bearing column and main beam structure;

[0022] Figure 4 is a schematic diagram of the structure of the connecting member between beams (1);

[0023] Figure 5 is a schematic diagram of the structure of the connecting parts between beams (2);

[0024] Figure 6 Schematic diagram of shear pad structure

[0025] Figure 7 Schematic diagram of the connection between the shear pad and the beam

[0026] Figure 8 This is a schematic diagram of the connection between the steel cage and the main beam;

[0027] Fig. 9 It is a schematic diagram of the connection between the beam connector and the main beam;

[0028] Fig.10 is a schematic diagram of the secondary beam structure;

[0029] Fig.11 for Figure 8 Front view;

[0030] Fig.12 for Figure 8 Side view;

[0031] Fig.13 for Figure 8 Detail of one end;

[0032] Fig.14 Schematic diagram of the connection between the main and secondary beams;

[0033] Fig.15 for Fig.12 Side view;

[0034] In the figure: 1 is a load-bearing column; 2 is a main beam; 3 is a prefabricated shear wall; 4 is a connecting piece between beams; 5 is a bolt; 6 is a connecting steel bar; 7 is a vertical connecting steel bar; 8 is an outwardly extending short bar on the column; 9 is a steel cage; 10 is a bolt hole; 11 is a secondary beam; 12 is a combined steel cage, 13 is a shear pad; 4-1 is an upper fixing plate; 4-2 is an upper fixing groove; 4-3 is a middle fixing groove; 4-4 is a lower fixing plate and 4-5 is a lower fixing groove; 11-1 is a concrete tenon; 11-3 is a U-shaped connecting piece; 11-2 is a concave connecting plate; 11-3-2 is a deep concave connecting plate; 11-3-1 is a short limb; 13-1 is a concave shear pad; 13-2 is a cross-shaped shear pad. DETAILED DESCRIPTION

[0035] In order to further illustrate the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0036] from Figure 1 — Fig.15 It can be seen that: load-bearing column 1, main beam 2, prefabricated shear wall 3, beam connector 4, bolts 5, connecting steel bars 6, vertical connecting steel bars 7, outrigger short bars on column 8, steel cage 9, bolt hole 10, secondary beam 11, combined steel cage 12, and shear pad 13.

[0037] The inter-beam connector 4 is composed of an upper fixing plate 4-1, an upper fixing groove 4-2, a middle fixing groove 4-3, a lower fixing plate 4-4, a lower fixing groove 4-5, bolt holes 10 and a connector body, wherein two upper fixing plates 4-1 surround an upper fixing groove 4-2 and bolt holes 10 are reserved at corresponding positions on the plates, and two lower fixing plates 4-4 surround a lower fixing groove 4-5 and bolt holes 10 are reserved at corresponding positions on the plates; the side view of the inter-beam connector 4 is an I-shaped component, that is, the lower fixing groove 4-5 extends farther than the upper fixing groove 4-2, and the upper fixing groove 4-2 and the lower fixing groove 4-5 surround a middle fixing groove 4-3.

[0038] The anti-shear pads 13 are in two forms: a concave anti-shear pad 13-1 and a cross-shaped anti-shear pad 13-2; two concave anti-shear pads 13-1 are arranged at the lower side of the upper fixing groove 4-2, and one cross-shaped anti-shear pad 13-2 is arranged at the lower side of the lower fixing groove 4-5.

[0039] A protruding concrete tenon 11-1 is prefabricated in the middle and upper part of the left and right ends of the secondary beam 11, the lower side of the concrete tenon 11-1 is a pre-embedded U-shaped connector 11-3, and the upper side is a pre-embedded concave connecting plate 11-2, and the pre-embedded U-shaped connector 11-3 is composed of a deep concave connecting plate 11-3-2 and a short limb 11-3-1.

[0040] The secondary beam 11 is connected to the inter-beam connector 4 by bolts 5; the concave connecting plate 11-2 on the upper side of the end of the secondary beam 11 is inserted into the upper fixing groove 4-2 and fixed by bolts 5; the U-shaped connecting piece 11-3 on the lower side of the end of the secondary beam 11 is inserted into the lower fixing groove 4-5 and fixed by bolts 5, and the short limb 11-3-1 covers the upper side of the lower fixing plate 4-4; the concrete tenon 11-1 in the middle of the end of the secondary beam 11 is inserted into the middle fixing groove 4-3, and the middle concrete tenon 11-1 covers the upper side of the short limb 11-3-1.

[0041] A steel cage 9 is arranged inside the load-bearing column 1 and connected to the main beam 2 , and a row of column-extending short bars 8 are pre-embedded at the left and right ends of the load-bearing column 1 .

[0042] A steel cage 9 is arranged inside the main beam 2, and a beam connector 4 is embedded in the middle of the main beam 2, wherein the embedded beam connector 4 is fixed together with the steel cage 9 inside the main beam 2, and concrete is poured together to prefabricate the main beam 2.

[0043] The left and right ends of the secondary beam 11 are pre-buried with U-shaped connecting pieces and concave connecting plates, which are connected and fixed together with the inter-beam connecting pieces 4 through bolts 5 , thereby connecting the main beam 2 and the secondary beam 11 .

[0044] The prefabricated shear wall 3 is connected to the load-bearing column 1 through the vertical connecting steel bars 7; wherein, the wall connecting steel bars 6 arranged on the left and right sides of the prefabricated shear wall 3 are overlapped with the outwardly extending short bars 8 on the column and are bundled with iron wires to form a combined steel cage 12, and the vertical connecting steel bars 7 pass through the combined steel cage 12 and are bundled inside the combined steel cage with iron wires; concrete is poured at the connection between the prefabricated shear wall 3 and the load-bearing column 1.

[0045] The precast shear wall 3 is connected to the main beam 2 via the connecting steel bars 6 , and concrete is poured at the connection between the precast shear wall 3 and the main beam 2 .

[0046] The main and secondary beam node connection of the assembled concrete frame structure is characterized in that the lower fixing groove 4-5 matches the U-shaped connecting piece 11-3, and the upper fixing groove 4-2 matches the bolt hole 10 reserved in the concave connecting plate 11-2.

[0047] The combined steel cage 12 and the connecting steel bars 7 at the connection between the prefabricated shear wall 3 and the load-bearing column 1 are formed into a concrete column by pouring concrete.

[0048] The inter-beam connecting member 4 is a hollow member.

Claims

1. The main and secondary beam node connection of the assembled concrete frame structure is characterized by: It comprises a load-bearing column (1), a main beam (2), a prefabricated shear wall (3), a connecting piece between beams (4), bolts (5), connecting steel bars (6), vertical connecting steel bars (7), short bars extending outwards on the column (8), a steel cage (9), bolt holes (10), a secondary beam (11), and a combined steel cage (12); A steel cage (9) is arranged inside the load-bearing column (1) and connected to the main beam (2). A row of column-extending short bars (8) are pre-buried at the left and right ends of the load-bearing column (1); A steel cage (9) is arranged inside the main beam (2), and an inter-beam connecting member (4) is pre-buried in the middle of the main beam (2), wherein the pre-buried inter-beam connecting member (4) is fixed together with the steel cage (9) inside the main beam (2), and concrete is poured together to prefabricate the main beam (2); The U-shaped connecting pieces and the concave connecting plates are embedded in the left and right ends of the secondary beam (11) and are connected and fixed together with the inter-beam connecting pieces (4) through bolts (5) so as to connect the main beam (2) and the secondary beam (11); The prefabricated shear wall (3) is connected to the load-bearing column (1) via vertical connecting steel bars (7); wherein the wall connecting steel bars (6) arranged on the left and right sides of the prefabricated shear wall (3) are overlapped with the outwardly extending short bars (8) on the column and are bound together with iron wires to form a combined steel cage (12); the vertical connecting steel bars (7) pass through the combined steel cage (12) and are bound inside the combined steel cage with iron wires; concrete is poured at the connection between the prefabricated shear wall (3) and the load-bearing column (1); The prefabricated shear wall (3) is connected to the main beam (2) through the connecting steel bars (6), and concrete is poured at the connection between the prefabricated shear wall (3) and the main beam (2); The beam connector (4) is composed of an upper fixing plate (4-1), an upper fixing groove (4-2), a middle fixing groove (4-3), a lower fixing plate (4-4), a lower fixing groove (4-5), a bolt hole (10) and a connector body, wherein two upper fixing plates (4-1) surround an upper fixing groove (4-2) and reserve bolt holes (10) at corresponding positions on the plates, and two lower fixing plates (4-4) surround a lower fixing groove (4-5) and reserve bolt holes (10) at corresponding positions on the plates; the beam connector (4) is an I-shaped component in a side view, i.e., the lower fixing groove (4-5) extends further outward than the upper fixing groove (4-2), and the upper fixing groove (4-2) and the lower fixing groove (4-5) surround a middle fixing groove (4-3); The shear pads (13) are in two forms: a concave shear pad (13-1) and a cross shear pad (13-2); two concave shear pads (13-1) are arranged on the lower side of the upper fixing groove (4-2), and one cross shear pad (13-2) is arranged on the lower side of the lower fixing groove (4-5).

2. The primary and secondary beam node connection of the assembled concrete frame structure according to claim 1 is characterized by: A protruding concrete tenon (11-1) is prefabricated at the middle and upper positions of the left and right ends of the secondary beam (11); a pre-buried U-shaped connecting piece (11-3) is provided at the lower side of the concrete tenon (11-1); a concave connecting plate (11-2) is pre-buried at the upper side; the pre-buried U-shaped connecting piece (11-3) is composed of a deep concave connecting plate (11-3-2) and a short limb (11-3-1).

3. The primary and secondary beam node connection of the assembled concrete frame structure according to claim 1 is characterized by: The secondary beam (11) is connected to the inter-beam connector (4) by bolts (5); wherein the concave connecting plate (11-2) on the upper side of the end of the secondary beam (11) is inserted into the interior of the upper fixing groove (4-2) and fixed by bolts (5); the U-shaped connecting piece (11-3) on the lower side of the end of the secondary beam (11) is inserted into the interior of the lower fixing groove (4-5) and fixed by bolts (5), and the short limb (11-3-1) covers the upper side of the lower fixing plate (4-4); the concrete tenon (11-1) in the middle of the end of the secondary beam (11) is inserted into the interior of the middle fixing groove (4-3), and the middle concrete tenon (11-1) covers the upper side of the short limb (11-3-1).

4. The primary and secondary beam node connection of the assembled concrete frame structure according to claim 3 is characterized by: The lower fixing groove (4-5) and the U-shaped connecting piece (11-3) match the positions of the bolt holes (10) reserved in the upper fixing groove (4-2) and the concave connecting plate (11-2).

5. The primary and secondary beam node connection of the assembled concrete frame structure according to claim 1 is characterized in that: The combined steel cage (12) and the connecting steel bars (7) at the connection between the prefabricated shear wall (3) and the load-bearing column (1) are formed into a concrete column by pouring concrete.

6. The primary and secondary beam node connection of the assembled concrete frame structure according to claim 1 is characterized by: The inter-beam connecting member (4) is a hollow member.

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