A connection node and construction method of assembled variable-section column and steel beam

Abstract

The present invention provides a connection node and a construction method for assembled variable-section columns and steel beams. The connection node realizes the connection of the node between the variable-section steel pipe and the steel beam through the arrangement of the internal connecting member and multiple external connecting members. For assembled buildings with uniform-section columns in high-rise buildings, the use of high-rise steel pipes and concrete is greatly saved, the weight of the steel pipe concrete column itself is greatly reduced, and the load force borne by the lower steel pipe concrete column is reduced; the weight of the high-rise steel pipe and accessories is reduced, which is convenient for transportation and lifting; at the same time, the connection node has a simple structure and is quick to construct, which can greatly improve assembly efficiency and reduce assembly costs.

Description

Technical Field

[0001] The present invention relates to the technical field of building structures, and in particular to a connection node between an assembled variable-section column and a steel beam and a construction method. Background Art

[0002] In the construction industry, the continuous emergence of high-rise buildings, long-span structures, and complex structural systems has placed higher demands on the mechanical properties, construction efficiency, and economic efficiency of structural materials. Steel tube concrete structures, a new structural form that combines the advantages of both steel and concrete, have been widely used in various types of buildings in recent years. They not only effectively leverage the high strength and ductility of steel, but also utilize the restraining effect of concrete on the steel tubes to improve the overall structure's load-bearing capacity and seismic performance.

[0003] However, in actual construction, the design of the structural joints remains a weak link in prefabricated building structures, and their performance directly affects the safety and stability of the entire structure. This is especially true in high-rise prefabricated buildings, where the load capacity of the steel pipes decreases as the floors rise. Therefore, for taller floors, the diameter of the steel pipes can be appropriately reduced while meeting the load capacity and construction standards.

[0004] However, the current traditional node connection method is only suitable for connecting nodes between steel pipes of the same diameter. It has problems such as complex construction and high cost, and it is difficult to meet the requirements of modern engineering for efficiency and economy. There are many obstacles both from the construction and mechanical perspectives, and it is not suitable for the assembly connection of nodes between variable-section columns. Summary of the Invention

[0005] In view of this, the object of the present invention is to provide a connection node and construction method for an assembled variable-section column and a steel beam to solve the above-mentioned problems.

[0006] The present invention adopts the following scheme:

[0007] The present application provides a connection node between an assembled variable-section column and a steel beam, comprising a first steel pipe disposed at an upper portion and a second steel pipe disposed at a lower portion, and a plurality of steel beams connected between the first steel pipe and the second steel pipe; and further comprising an inner connecting member and a plurality of outer connecting members;

[0008] The inner connecting member includes a cross-shaped rib, a first end plate connected to the outer peripheral end of the cross-shaped rib, and a first annular end plate connected to the upper end surface of the cross-shaped rib; a plurality of outer connecting members are arranged around the inner connecting member, and include a main member adapted to the outer size of the second steel pipe, a second end plate connected to the upper and lower end surfaces of the main member, and a third end plate connected to the end surfaces of both sides of the main member; the main member is connected to the first end plate;

[0009] The outer diameter of the first steel pipe is smaller than the outer diameter of the second steel pipe; wherein at least the lower end surface of the first steel pipe is provided with a second annular end plate connected to the first annular end plate; at least the upper end surface of the second steel pipe is provided with a third annular end plate connected to the second end plate;

[0010] A connecting groove is provided between the third end plates of the two outer connecting members; the steel beam is an I-beam, the web of which is placed in the connecting groove and connected to the two adjacent third end plates, the upper flange plate is connected to the second end plate, and the lower flange plate is connected to the third annular end plate;

[0011] Concrete is poured into the first steel pipe, the second steel pipe and the external connecting piece.

[0012] Furthermore, a connecting sleeve is provided on the first annular end plate.

[0013] Furthermore, the second annular end plate and the connecting sleeve on the first annular end plate, the second end plate on the upper end face of the main body and the upper flange, and the second end plate on the lower end face and the lower flange are connected by high-strength screws.

[0014] Furthermore, the first end plate and the main body, as well as the two adjacent third end plates and the web are connected by common bolts.

[0015] Furthermore, a steel pad is included, which is arranged between the third annular end plate, the second end plate on the lower end surface of the main body and the two adjacent lower flanges.

[0016] Furthermore, the first steel pipe and the second steel pipe are square steel pipes; the first annular end plate and the second annular end plate are matching square annular end plates.

[0017] Furthermore, the main body is L-shaped, and the second end plate connected to the upper and lower end surfaces thereof is also L-shaped.

[0018] A construction method for connecting nodes, comprising the following steps:

[0019] First, the first steel pipe, the second steel pipe, the outer connecting piece, the inner connecting piece and the steel beam are prefabricated in a prefabrication plant;

[0020] Then, the pipe is transported to the construction site for assembly; first, a plurality of the external connecting members are arranged around the external portion of the internal connecting member, and the main body is connected to the first end plate by bolts; then, the second end plate on the lower end surface of the main body is connected to the third annular end plate by bolts; then, the second annular end plate on the lower end surface of the first steel pipe is connected to the first annular end plate by bolts, with a gap reserved; finally, the web of the I-beam is inserted into the connecting groove, and the lower flange plate is inserted into the gap, and then, the web is connected to the two adjacent third end plates, the upper flange plate to the second end plate, and the lower flange plate to the third annular end plate and the second end plate by bolts;

[0021] Finally, concrete is poured into the first steel pipe, the second steel pipe and the external connecting member.

[0022] Furthermore, in the prefabrication step, the upper and lower end faces of the first steel pipe and the second steel pipe are respectively connected to the second annular end plate and the third annular end plate by welding; the internal connecting member first welds the four first steel plates into the cross-shaped cross rib plate, and then welds the first end plates on the side end faces of the four first steel plates, and welds the first annular end plate on the upper end face of the cross rib plate; the external connecting member welds the second end plates on the upper and lower end faces of the main body, and welds the third end plates on the side end plates of the main body.

[0023] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0024] The present invention provides a connection node between an assembled variable-section column and a steel beam. By arranging the internal connecting member and a plurality of external connecting members, the connection between the variable-section steel pipe and the steel beam is realized. For assembled buildings with uniform-section columns of high-rise buildings, the use of high-rise steel pipes and concrete is greatly saved, the weight of the steel pipe concrete column itself is greatly reduced, and the load force borne by the lower steel pipe concrete column is reduced; the weight of the high-rise steel pipe and accessories is reduced, which is convenient for transportation and lifting; at the same time, the connection node has a simple structure and is quick to construct, which can greatly improve assembly efficiency and reduce assembly costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1This is a schematic diagram of a first steel pipe structure of a connection node between an assembled variable-section column and a steel beam according to an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of an internal connector of a connection node between an assembled variable-section column and a steel beam according to an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of an external connecting piece of a connection node between an assembled variable-section column and a steel beam according to an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of a steel beam structure of a connection node between an assembled variable-section column and a steel beam according to an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the steel pad structure of a connection node between an assembled variable-section column and a steel beam according to an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the exploded structure of a connection node between an assembled variable-section column and a steel beam according to an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of a connection node structure of an assembled variable-section column and a steel beam according to an embodiment of the present invention;

[0033] Icons: first steel pipe 1, second steel pipe 2, inner connecting part 3, outer connecting part 4, steel beam 5, steel pad 6, high-strength bolt 7, ordinary bolt 8, concrete 9, second annular end plate 12, third annular end plate 22, connecting sleeve 34, cross rib 31, first end plate 33, first annular end plate 32, main body 41, second end plate 42, third end plate 43, web 51, upper flange plate 52, lower flange plate 53. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention for which protection is sought, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] Example

[0036] Combine Figures 1 to 7 As shown, this embodiment provides a connection node between an assembled variable-section column and a steel beam, comprising a first steel pipe 1 placed at the top and a second steel pipe 2 placed at the bottom, and a plurality of steel beams 5 connected between the first steel pipe 1 and the second steel pipe 2; and further comprising an inner connecting member 3 and a plurality of outer connecting members 4;

[0037] The inner connecting member 3 includes a cross-shaped rib 31, a first end plate 33 connected to the outer peripheral end of the cross-shaped rib 31, and a first annular end plate 32 connected to the upper end surface of the cross-shaped rib 31; a plurality of outer connecting members 4 are arranged around the outer surface of the inner connecting member 3, and include a main member 41 adapted to the outer dimensions of the second steel pipe 2, a second end plate 42 connected to the upper and lower end surfaces of the main member 41, and a third end plate 43 connected to the end surfaces of both sides of the main member 41; the main member 41 is connected to the first end plate 33;

[0038] The outer diameter of the first steel pipe 1 is smaller than the outer diameter of the second steel pipe 2; wherein at least the lower end surface of the first steel pipe 1 is provided with a second annular end plate 12 connected to the first annular end plate 32; at least the upper end surface of the second steel pipe 2 is provided with a third annular end plate 22 connected to the second end plate 42;

[0039] A connecting groove is provided between the third end plates 43 of the two outer connectors 4; the steel beam 5 is an I-beam, the web 51 of which is placed in the connecting groove and connected to the two adjacent third end plates 43, the upper flange plate 52 is connected to the second end plate 42, and the lower flange plate 53 is connected to the third annular end plate 22;

[0040] Concrete 9 is poured into the first steel pipe 1 , the second steel pipe 2 and the external connecting member 4 .

[0041] Specifically, in this embodiment, Figure 1 and Figure 7 As shown, taking the first steel tube 1 and the second steel tube 2 as square steel tubes as an example, the first steel tube 1 has a smaller outer diameter than the second steel tube 2. The upper and lower end surfaces of the first steel tube 1 are respectively welded with the second square annular end plates 12, and the second annular end plates 12 are provided with connection holes for bolts to pass through. The upper and lower end surfaces of the second steel tube 2 are respectively welded with the third square annular end plates 22, and the third annular end plates 22 are provided with connection holes for bolts to pass through.

[0042] like Figure 2 and Figure 3As shown, the inner connector 3 includes four cross-shaped ribs 31 welded together from steel plates, four first end plates 33 connected to the outer peripheral ends of the cross-shaped ribs 31, and a square first annular end plate 32 connected to the upper end surface of the cross-shaped ribs 31. The first end plates 33 are provided with connection holes for bolts to pass through. Multiple outer connectors 4 are arranged outside the inner connector 3 and include two L-shaped main members 41 welded together at right angles to form the second end plates 42, L-shaped steel plates adapted to the outer dimensions of the second steel tube 2 and welded to the upper and lower end surfaces of the main member 41, and third end plates 43, steel plates welded to the side end surfaces of the main member 41. The third end plates 43 are connected to the first end plates 33. Connection holes for bolts to pass through are provided on the main member 41, the two second end plates 42, and the two third end plates 43.

[0043] like Figure 4 As shown, the steel beam 5 is an I-beam, and connection holes for bolts to pass through are provided on the web 51 thereof, as well as on the upper flange plate 52 and the lower flange plate 53. In this embodiment, a connection sleeve 34 is provided on the first annular end plate 32.

[0044] The four outer connectors 4 are positioned around the inner connector 3. The main body 41 is connected to the first end plate 33 via conventional bolts 8, and a connecting groove is provided between the third end plates 43 of two adjacent outer connectors 4. The second annular end surface at the lower end of the first steel tube 1 is connected to the connecting sleeve 34 on the first annular end plate 32 via high-strength bolts 7. The second end plate 42 at the lower end of the outer connector 4 is connected to the third annular end plate 22 at the upper end of the second steel tube 2 via high-strength bolts 7, with a gap reserved between the second end plate 42 at the lower end of the outer connector 4 and the third annular end plate 22 at the upper end of the second steel tube 2. The web 51 of the I-beam is inserted into the connecting groove, and the lower flange plate 53 is inserted into the gap, connected via high-strength bolts 7. The high-strength bolts 7 not only serve as anchors but also, to a certain extent, act as longitudinal reinforcement, providing shear resistance and force transmission at the node, thereby improving the integrity of the connection.

[0045] This connection node realizes a node connection between two steel pipes of different cross-sectional sizes and a steel beam 5. The upper part of the second steel pipe 2 and the lower part of the first steel pipe 1 have a large contact area to ensure structural stability; and it ensures that the cross-section of the two steel pipes and the beam 5 completely intersect, thereby ensuring the connection strength of the steel beam. For high-rise buildings, it can greatly reduce the use of high-rise steel pipes and concrete 9, not only saving building materials, but also reducing the weight of the high-rise steel tube concrete 9 columns themselves, thereby reducing the load force borne by the lower steel tube concrete 9 columns. The small size of the high-rise steel pipes is also convenient for transportation and lifting. The connection structure of this node is relatively simple, and it is directly connected by bolts, which is quick to install.

[0046] Furthermore, the first steel pipe 1, the second steel pipe 2, and the external connector 4 can be directly used as a constrained formwork for pouring, eliminating the need for subsequent formwork removal. The concrete inside is poured on-site, further reducing the weight of the assembled components and facilitating transportation and lifting. The first steel pipe 1, the second steel pipe 2, the external connector 4, the internal connector 3, and the steel beam 5 can all be prefabricated in a prefabrication plant and then transported to the site for assembly, significantly reducing the number of on-site construction steps and improving efficiency.

[0047] Preferably, if Figure 5 and Figure 6 As shown, a steel spacer 6 is also included, which is disposed between the third annular end plate 22, the second end plate 42 on the lower end surface of the main body 41, and the two adjacent lower flanges, and is connected and fixed by bolts. The provision of the steel spacer 6 eliminates the problems of sudden cross-sectional and stress changes, reduces stress concentration during force application, and further eliminates safety hazards.

[0048] The following is a detailed description of the construction method of the connection node, including the following steps:

[0049] First, the first steel pipe 1, the second steel pipe 2, the outer connecting piece 4, the inner connecting piece 3 and the steel beam 5 are prefabricated in a prefabrication plant;

[0050] The upper and lower end surfaces of the first steel tube 1 and the second steel tube 2 are respectively connected to the square second annular end plate 12 and the third annular end plate 22 by welding; the inner connecting member 3 first welds the four first steel plates into the cross-shaped cross rib 31, and then welds the first end plate 33 to the side end surfaces of the four first steel plates, and welds the first annular end plate 32 to the upper end surface of the cross rib 31; the outer connecting member 4 welds the second end plate 42 to the upper and lower end surfaces of the main body 41, and welds the third end plate 43 to the side end plates of the main body 41; and connection holes for bolts to pass through are reserved at appropriate positions on the above end plates, ribs, web 51 and flange plates of the I-beam;

[0051] Then, it is transported to the construction site for assembly; first, multiple external connecting parts 4 are arranged around the outside of the internal connecting part 3, and the main part 41 is connected to the first end plate 33 by bolts; then the second end plate 42 on the lower end face of the main part 41 is connected to the third annular end plate 22 by bolts; then the second annular end plate 12 on the lower end face of the first steel pipe 1 is connected to the first annular end plate 32 by bolts, and a gap is reserved; finally, the web 51 of the I-beam is inserted into the connecting groove, and the lower flange plate 53 is inserted into the gap, and then the web 51 is connected to the two adjacent third end plates 43, the upper flange plate 52 is connected to the second end plate 42, and the lower flange plate 53 is connected to the third annular end plate 22 and the second end plate 42 by bolts;

[0052] Finally, concrete 9 is poured into the first steel pipe 1 , the second steel pipe 2 and the external connecting member 4 .

[0053] The above-mentioned first steel pipe 1, second steel pipe 2, external connecting piece 4, internal connecting piece 3 and steel beam 5 are all prefabricated in the prefabrication plant. They only need to be bolted and assembled at the construction site and then concrete 9 poured. The installation is simple and convenient, which greatly improves the efficiency and progress of on-site construction.

[0054] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention.

[0055] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0057] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0058] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

Claims

1. A connection node between an assembled variable-section column and a steel beam, comprising a first steel tube disposed at an upper portion, a second steel tube disposed at a lower portion, and a plurality of steel beams connected between the first steel tube and the second steel tube; characterized in that: Also included are an inner connecting piece and a plurality of outer connecting pieces; The inner connecting member includes a cross-shaped rib, a first end plate connected to the outer peripheral end of the cross-shaped rib, and a first annular end plate connected to the upper end surface of the cross-shaped rib; a plurality of outer connecting members are arranged around the inner connecting member, and include a main member adapted to the outer size of the second steel pipe, a second end plate connected to the upper and lower end surfaces of the main member, and a third end plate connected to the end surfaces of both sides of the main member; the main member is connected to the first end plate; The outer diameter of the first steel pipe is smaller than the outer diameter of the second steel pipe; wherein at least the lower end surface of the first steel pipe is provided with a second annular end plate connected to the first annular end plate; at least the upper end surface of the second steel pipe is provided with a third annular end plate connected to the second end plate; A connecting groove is provided between the third end plates of the two outer connecting members; the steel beam is an I-beam, the web of which is placed in the connecting groove and connected to the two adjacent third end plates, the upper flange plate is connected to the second end plate, and the lower flange plate is connected to the third annular end plate; Concrete is poured into the first steel pipe, the second steel pipe and the external connecting piece.

2. The connection node between the assembled variable-section column and the steel beam according to claim 1, characterized in that: A connecting sleeve is provided on the first annular end plate.

3. The connection node between the assembled variable-section column and the steel beam according to claim 2, characterized in that: The second annular end plate and the connecting sleeve on the first annular end plate, the second end plate on the upper end face of the main body and the upper flange, and the second end plate on the lower end face and the lower flange are connected by high-strength screws.

4. The connection node between the assembled variable-section column and the steel beam according to claim 3, characterized in that: The first end plate and the main body, as well as the two adjacent third end plates and the web are connected by common bolts.

5. The connection node between the assembled variable-section column and the steel beam according to claim 1, characterized in that: It also includes a steel pad, which is arranged between the third annular end plate, the second end plate on the lower end surface of the main body and the two adjacent lower flanges.

6. The connection node between the assembled variable-section column and the steel beam according to any one of claims 1 to 5, characterized in that: The first steel pipe and the second steel pipe are square steel pipes; the first annular end plate and the second annular end plate are matched square annular end plates.

7. The connection node between the assembled variable-section column and the steel beam according to claim 6, characterized in that: The main body is L-shaped, and the second end plate connected to the upper and lower end surfaces of the main body is L-shaped.

8. A construction method for a connection node, wherein the connection node is a connection node according to any one of claims 1 to 7, characterized in that: The following steps are involved: First, the first steel pipe, the second steel pipe, the outer connecting piece, the inner connecting piece and the steel beam are prefabricated in a prefabrication plant; Then, the pipe is transported to the construction site for assembly; first, a plurality of the external connecting members are arranged around the external portion of the internal connecting member, and the main body is connected to the first end plate by bolts; then, the second end plate on the lower end surface of the main body is connected to the third annular end plate by bolts; then, the second annular end plate on the lower end surface of the first steel pipe is connected to the first annular end plate by bolts, with a gap reserved; finally, the web of the I-beam is inserted into the connecting groove, and the lower flange plate is inserted into the gap, and then, the web is connected to the two adjacent third end plates, the upper flange plate to the second end plate, and the lower flange plate to the third annular end plate and the second end plate by bolts; Finally, concrete is poured into the first steel pipe, the second steel pipe and the external connecting member.

9. The construction method of the connection node according to claim 8, characterized in that: In the prefabrication step, the upper and lower end faces of the first steel pipe and the second steel pipe are respectively connected to the second annular end plate and the third annular end plate by welding; the internal connecting member first welds the four first steel plates into the cross-shaped cross rib plate, and then welds the first end plates on the side end faces of the four first steel plates, and welds the first annular end plate on the upper end face of the cross rib plate; the external connecting member welds the second end plates on the upper and lower end faces of the main body, and welds the third end plates on the side end plates of the main body.

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