Connecting joint of fabricated variable cross-section column and steel beam and construction method

Abstract

According to the connecting joint of the fabricated variable-cross-section column and the steel beam and the construction method, through the arrangement of the inner connecting piece and the multiple outer connecting pieces, the connecting joint achieves connection of joints between a variable-cross-section steel pipe and the steel beam, and for a fabricated building with uniform-cross-section columns of a high-rise building, the connecting joint has the advantages of being simple in structure and convenient to use. The use of high-rise steel pipes and concrete is greatly saved, the weight of the concrete-filled steel tubular column is greatly reduced, and the loading force borne by the concrete-filled steel tubular column at the lower part is further reduced; the weight of high-rise steel pipes and accessories is reduced, so that transportation and hoisting are facilitated; meanwhile, the connecting joint is simple in structure, rapid in construction and capable of greatly improving the assembling efficiency and reducing the assembling cost.

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 field of construction engineering, with the continuous emergence of high-rise buildings, large-span structures and complex structural systems, higher requirements are placed on the mechanical properties, construction efficiency and economy of structural materials. As a new type of structure that combines the advantages of steel and concrete, steel tube concrete structure has been widely used in various types of buildings in recent years. It can not only effectively exert the high strength and ductility of steel, but also utilize the restraint effect of concrete on the square steel tube to improve the bearing capacity and seismic performance of the overall structure.

[0003] However, in actual projects, the node design of this structure is still the weak link of the prefabricated overall building structure, and its performance directly affects the safety and stability of the overall structure. Especially in high-rise prefabricated buildings, as the floors increase, the load force borne by the steel pipes decreases. Therefore, for high floors, the diameter of the steel pipe can be appropriately reduced while meeting the bearing capacity and construction standards.

[0004] However, the current traditional node connection method is only for the connection between nodes of steel pipes with the same diameter. It has problems such as complex construction and high cost. 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. It is not suitable for the assembly connection of nodes between variable-section columns. Summary of the invention

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

[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 also comprising an inner connecting member and a plurality of outer connecting members;

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

[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, and the two adjacent third end plates and the web are connected by common bolts.

[0015] Furthermore, 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.

[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 L-shaped.

[0018] A construction method for a connection node, wherein the connection node is a connection node as claimed in any one of claims 1 to 7, 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, transport it to the construction site for assembly; first, surround the plurality of external connecting members outside the internal connecting member, and connect the main member and the first end plate by bolts; then connect the second end plate on the lower end face of the main member and the third annular end plate by bolts; then connect the second annular end plate on the lower end face of the first steel pipe and the first annular end plate by bolts, and reserve a gap; finally, insert the web of the I-beam into the connecting groove, insert the lower flange plate into the gap, and then use bolts to connect the web with the two adjacent third end plates, the upper flange plate with the second end plate, and the lower flange plate with the third annular end plate and the second end plate;

[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 end plate and the third end plate by welding; the internal connecting member first welds the four first steel plates into a cross-shaped cross rib plate, and then welds the third end plate to the side end faces of the four first steel plates, and welds the first annular end plate to the upper end face of the cross rib plate; the external connecting member welds the second end plate to the upper and lower end faces of the main body, and welds the third end plate to 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, which realizes the connection of the node between the variable-section steel pipe and the steel beam by setting the inner connecting piece and the plurality of outer connecting pieces. For assembled buildings with equal-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; and the weight of the high-rise steel pipe and accessories is reduced, which is convenient for transportation and hoisting; 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 drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying 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 It is a schematic diagram of the structure of an inner connecting piece 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 It 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 It 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 It is a schematic diagram of a 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 It 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 bolts 7, ordinary bolts 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 belong to 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 claimed for protection, but merely represents the 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 belong to the scope of protection of the present invention.

[0035] Example

[0036] Combination Figures 1 to 7 As shown, this embodiment provides a connection node between an assembled variable-section column and a steel beam, including 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 also includes an inner connecting member 3 and a plurality of outer connecting members 4;

[0037] The inner connecting member 3 includes a cross-shaped rib plate 31, a first end plate 33 connected to the outer peripheral end of the cross-shaped rib plate 31, and a first annular end plate 32 connected to the upper end surface of the cross-shaped rib plate 31; a plurality of outer connecting members 4 are arranged outside the inner connecting member 3, and include a main body 41 adapted to the outer size of the second steel pipe 2, a second end plate 42 connected to the upper and lower end surfaces of the main body 41, and a third end plate 43 connected to the end surfaces of both sides of the main body 41; the third end plate 43 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 connection groove is provided between the third end plates 43 of the two outer connecting members 4; the steel beam 5 is an I-beam, the web 51 of which is placed in the connection 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 inside 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, the first steel pipe 1 and the second steel pipe 2 are square steel pipes as an example. The outer diameter of the first steel pipe 1 is smaller than that of the second steel pipe 2, and the upper and lower end surfaces of the first steel pipe 1 are respectively welded with the second square annular end plate 12, and the second annular end plate 12 is provided with connection holes for bolts to pass through. The upper and lower end surfaces of the second steel pipe 2 are respectively welded with the third square annular end plate 22, and the third annular end plate 22 is provided with connection holes for bolts to pass through.

[0042] like Figure 2 and Figure 3As shown, the inner connecting member 3 includes the cross-shaped ribs 31 formed by welding four steel plates, four first end plates 33 respectively connected to the outer peripheral ends of the cross-shaped ribs 31, and the square first annular end plate 32 connected to the upper end surface of the cross-shaped ribs 31; the first end plate 33 is reserved with connection holes for bolts to pass through. A plurality of the outer connecting members 4 are arranged outside the inner connecting member 3, which include the main body 41 formed by welding two steel plates at right angles to form an L-shaped body, the L-shaped steel plates adapted to the outer size of the second steel pipe 2, respectively welded to the upper and lower end surfaces of the main body 41 to form the second end plate 42, and the steel plates respectively welded to the end surfaces of both sides of the main body 41 to form the third end plate 43; the third end plate 43 is used to connect to the first end plate 33. The main body 41, the two second end plates 42 and the two third end plates 43 are all provided with connection holes for the bolts to pass through.

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

[0044] The four outer connecting members 4 are arranged outside the inner connecting member 3, the main body 41 is connected to the first end plate 33 by ordinary bolts 8, and the connecting groove is provided between the two third end plates 43 of the two adjacent outer connecting members 4. The second annular end surface of the lower end of the first steel pipe 1 is connected to the connecting sleeve 34 on the first annular end plate 32 by high-strength bolts 7. The second end plate 42 at the lower end surface of the outer connecting member 4 and the third annular end plate 22 at the upper end surface of the second steel pipe 2 are connected by high-strength bolts 7, and a gap is reserved between the second end plate 42 at the lower end surface of the outer connecting member 4 and the third annular end plate 22 at the upper end surface of the second steel pipe 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, and connected by high-strength bolts 7. The setting of the high-strength bolts 7 not only plays the role of anchoring, but also plays the role of longitudinal reinforcement to a certain extent, so as to play the role of node shear resistance and force transmission, and improve the integrity of the connection node.

[0045] This connection node realizes the node connection between two steel pipes of different cross-sectional sizes and the 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 the stability of the structure; and it is ensured that the beam cross-section between the two steel pipes and the steel beam 5 is completely intersected, 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, which not only saves building materials, but also reduces 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. And the small-sized steel pipes of the high-rise are also convenient for transportation and hoisting. The connection structure of this node is relatively simple, and it is directly connected by bolts, which is quick to install.

[0046] At the same time, 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 without the need for subsequent demolding. The internal concrete is poured on site, further reducing the weight of the assembled components and making them easier to transport and hoist. 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, which greatly reduces the process steps of on-site construction and improves the efficiency of on-site construction.

[0047] Preferably, if Figure 5 and Figure 6 As shown, a steel pad 6 is also included, which is arranged 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 arrangement of the steel pad 6 eliminates the problems of cross-sectional and stress mutations, reduces the problem of stress concentration in the force, 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 end plate 42 and the third end plate 43 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 third end plate 43 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, webs 51 and flanges of the I-beams;

[0051] Then, it is transported to the construction site for assembly; first, a plurality of the outer connecting members 4 are arranged outside the inner connecting member 3, and the main body 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 body 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 in the first steel pipe 1 , the second steel pipe 2 and the external connecting member 4 .

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

[0054] The above are only preferred implementations 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 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, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates 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 pipe disposed at an upper portion, 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; characterized in that: Also includes an inner connecting member and a plurality of outer connecting members; The inner connecting member includes a cross-shaped rib plate, a first end plate connected to the outer peripheral end of the cross-shaped rib plate, and a first annular end plate connected to the upper end surface of the cross-shaped rib plate; a plurality of outer connecting members are arranged outside the inner connecting member, and include a main body 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 body member, and a third end plate connected to the end surfaces of both sides of the main body member; the third end plate 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 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 inside the first steel pipe, the second steel pipe and the external connecting member.

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

3. The connection node between the assembled variable-section column and the steel beam according to claim 2 is 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 is 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 matching 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 thereof is L-shaped.

8. A construction method for a connection node, wherein the connection node is a connection node as claimed in 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, transport it to the construction site for assembly; first, surround the plurality of external connecting members outside the internal connecting member, and connect the main member and the first end plate by bolts; then connect the second end plate on the lower end face of the main member and the third annular end plate by bolts; then connect the second annular end plate on the lower end face of the first steel pipe and the first annular end plate by bolts, and reserve a gap; finally, insert the web of the I-beam into the connecting groove, insert the lower flange plate into the gap, and then use bolts to connect the web with the two adjacent third end plates, the upper flange plate with the second end plate, and the lower flange plate with the third annular end plate and the second end plate; 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 end plate and the third 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 third end plate to the side end faces of the four first steel plates, and welds the first annular end plate to the upper end face of the cross rib plate; the external connecting member welds the second end plate to the upper and lower end faces of the main body, and welds the third end plate to the side end plates of the main body.

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