Prefabricated modular assembly with liner-assisted flange semi-rigid node connection structure

Abstract

This invention provides a semi-rigid node connection structure with an auxiliary flange and inner liner for prefabricated modules. It includes aluminum alloy square tube columns and aluminum alloy round tube beams in a prefabricated frame unit. Aluminum alloy round tube beams are connected to both sides of the aluminum alloy square tube columns in a secondary direction. An inner liner is inserted transversely through the aluminum alloy square tube columns in the secondary direction, with both ends extending outwards from and fixedly connected to the aluminum alloy square tube columns. The end of the aluminum alloy round tube beam on the corresponding side of the aluminum alloy square tube column is fitted over the extended end of the inner liner. A sleeve flange is fitted over the end of the aluminum alloy round tube beam, and the sleeve flange is fixedly connected to the web of the aluminum alloy square tube column. The sleeve flange, the aluminum alloy round tube beam, and the inner liner are connected by bolts. This invention solves the connection problem between square tube columns and round tube beams in prefabricated aluminum alloy frames, meeting the requirements for semi-rigid node connections while maintaining architectural aesthetics, and ensuring that spatial constraints meet the overall structural stability requirements.

Description

Technical Field

[0001] This invention belongs to the field of semi-rigid node connection technology of prefabricated modules, specifically relating to a semi-rigid node connection structure of an inner liner tube auxiliary flange for prefabricated modules. It can be applied in prefabricated space metal frame structures, and is especially suitable for prefabricated aluminum alloy frame modules where the node area at the component connection is narrow and not conducive to operation. Background Technology

[0002] Prefabricated buildings better meet the requirements of green building. Standardized design, information-based management, and digitalized processing will increasingly improve the cost-effectiveness of prefabricated buildings. Furthermore, aluminum alloy spatial structures have extremely high recyclability. For prefabricated aluminum alloy irregular-shaped frame structures, the building space is complex, with numerous members and connection points. If loose members are used, on-site installation is difficult, the construction period is long, and the cumulative errors from installation make it difficult to guarantee structural quality standards. Based on a comprehensive analysis of the structural spatial composition and the performance of the materials used, the adoption of modular prefabrication technology is the inevitable trend.

[0003] For secondary directional node connections in prefabricated assembled structures, the narrow node area at component connections makes conventional bolted connections insufficient to meet architectural aesthetic requirements. There are insufficient national, industry, and local technical standards for node connection design in aluminum alloy structures, and no design experience to draw upon. If on-site welding is used, the high residual stress in aluminum alloy welding leads to severe strength degradation in the heat-affected zone, failing to meet the rigid connection requirements between unit modules and the structural load-bearing capacity requirements. The connection between small-diameter circular pipes and box-shaped aluminum alloy columns must satisfy both the aesthetic and clean requirements of architectural design and the load-bearing capacity and stability requirements of the spatial irregular frame. Existing conventional component connections struggle to achieve both, hence the development of a semi-rigid node with an inner liner and auxiliary flange. Therefore, improvements are necessary. Summary of the Invention

[0004] The technical problem solved by this invention is to provide a semi-rigid node connection structure with an inner liner tube and an auxiliary flange for prefabricated modules. This invention achieves the purpose of semi-rigid connection of aluminum alloy beams and columns by using a pre-reinforced inner liner tube with an outer sleeve flange, solving the connection problem between square tube columns and round tube beams in prefabricated aluminum alloy frames. Under the premise of architectural aesthetics, it meets the requirements of semi-rigid node connection and ensures that spatial constraints meet the requirements of overall structural stability.

[0005] The technical solution adopted in this invention is: a semi-rigid node connection structure with an inner liner tube and an auxiliary flange for the prefabricated module, including aluminum alloy square tube columns and aluminum alloy round tube beams in the prefabricated frame unit. Aluminum alloy round tube beams are connected to both sides of the aluminum alloy square tube columns in the secondary direction. A node inner liner tube passes through the aluminum alloy square tube columns in the secondary direction. Both ends of the node inner liner tube extend outwards from both sides of the aluminum alloy square tube columns in the secondary direction and are fixedly connected to the aluminum alloy square tube columns. The end of the aluminum alloy round tube beam on the corresponding side of the aluminum alloy square tube column is sleeved outside the extended end of the node inner liner tube. A sleeve flange is sleeved outside the end of the aluminum alloy round tube beam. The sleeve flange is fixedly connected to the web of the aluminum alloy square tube column. The sleeve flange, the aluminum alloy round tube beam, and the node inner liner tube are connected by bolts.

[0006] Further defining the above technical solution, the node inner liner tube is fixedly connected to the aluminum alloy square tube column by welding, and the node inner liner tube is an inner sleeve made of reinforced stainless steel.

[0007] Further defining the above technical solution, the sleeve flange includes a flange plate and a flange sleeve. The flange plate is fixedly connected to the web plate of the aluminum alloy square tube in the secondary direction by screws. The flange sleeve is fitted onto the end of the aluminum alloy round tube beam. Flange auxiliary cover plates are symmetrically distributed around the outer surface of the flange sleeve. Holes for bolts to pass through are provided on the flange auxiliary cover plates of the sleeve flange, the corresponding flange sleeve, the aluminum alloy round tube beam, and the node inner liner.

[0008] As a further limitation of the above technical solution, the sleeve flange is a cast aluminum flange.

[0009] To further specify the above technical solution, the screw is a stainless steel countersunk screw.

[0010] To further specify the above technical solution, the bolt is a limiting shear bolt.

[0011] Advantages of this invention compared to existing technologies:

[0012] 1. The semi-rigid node connection technology with auxiliary flange of inner lining tube in this scheme adopts the auxiliary method of pre-reinforced node inner lining tube with sleeve flange to meet the purpose of semi-rigid connection of aluminum alloy beam and column, solves the connection problem of square tube column and round tube beam in prefabricated aluminum alloy frame, meets the semi-rigid connection requirements of node under the specific premise of architectural aesthetics, and makes the spatial constraints meet the overall structural stability requirements.

[0013] 2. This solution is widely used in the semi-rigid connection of secondary frame beams and columns in prefabricated aluminum alloy frames. It has achieved good results in engineering applications and can be used as a reference for semi-rigid connection projects of prefabricated aluminum alloy frames. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention;

[0015] Figure 2 This is a schematic diagram of the connection side of the sleeve flange in this invention;

[0016] Figure 3 This is a schematic diagram of the sleeve flange structure in this invention;

[0017] Figure 4 This is a schematic diagram of node connection analysis in an embodiment of the present invention. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0020] Please see Figure 1-4 The embodiments of the present invention are described in detail below.

[0021] The prefabricated module uses an inner liner tube-assisted flange-type semi-rigid node connection structure, including aluminum alloy square tube columns 1 and aluminum alloy round tube beams 2 in the prefabricated frame unit. Aluminum alloy square tube columns 1 are connected to aluminum alloy round tube beams 2 on both sides in the primary direction. To control the installation error of the aluminum alloy columns, a 20mm adjustment gap is reserved between the aluminum alloy square tube column 1 and the base plate of the aluminum alloy square tube column for positioning.

[0022] The aluminum alloy square tube column 1 is traversed by a node inner liner 4 in the primary direction. Both ends of the node inner liner 4 extend beyond the two sides of the aluminum alloy square tube column 1 in the primary direction and are fixedly connected to the aluminum alloy square tube column 1. The node inner liner 4 is fixedly connected to the aluminum alloy square tube column 1 by welding. Preferably, the node inner liner 4 is an inner sleeve made of reinforced stainless steel. The end of the aluminum alloy round tube beam 2 on the corresponding side of the aluminum alloy square tube column 1 is fitted over the extended end of the node inner liner 4. A sleeve flange 3 is fitted over the end of the aluminum alloy round tube beam 2, and the sleeve flange 3 is fixedly connected to the web of the aluminum alloy square tube column 1. The sleeve flange 3, the aluminum alloy round tube beam 2, and the node inner liner 4 are connected by bolts 6.

[0023] Specifically, the sleeve flange 3 includes a flange 3-1 and a flange sleeve 3-2. The flange 3-1 is fixedly connected to the primary web of the aluminum alloy square tube column by screws 5. The flange sleeve 3-2 is fitted onto the end of the aluminum alloy round tube beam 2. Flange auxiliary cover plates 3-3 are symmetrically distributed on the outer surface of the flange sleeve 3-2. The flange auxiliary cover plates 3-3 of the sleeve flange 3, as well as the corresponding flange sleeve 3-2, the aluminum alloy round tube beam 2, and the node inner liner 4, are all provided with holes for bolts 6 to pass through.

[0024] Preferably, the sleeve flange 3 is a cast aluminum flange.

[0025] Preferably, the screw 5 is a stainless steel countersunk screw, which is anchored into the concrete by welding anchor bolts onto the stainless steel outer cylinder.

[0026] Preferably, the bolt 6 is a limiting shear bolt, which bears the shear force at the node.

[0027] The semi-rigid node connection technology of the inner lining tube auxiliary flange was successfully applied in the off-site signage project of Mingde Gate of Sui Chang'an City. It effectively solved the application of new materials in the field of historical and cultural relic protection, and demonstrated the perfect combination of technological innovation and cultural confidence.

[0028] For the secondary direction densely arrayed small-diameter aluminum alloy round tube beams (Φ100x4mm) of the aluminum alloy frame, penetrating the box column to form a secondary direction frame (Y direction arrangement), the inner liner tube is used to assist the flange semi-rigid node connection. Through structural modeling analysis, the spatial stiffness and member strength meet the Y direction bearing capacity and deformation requirements.

[0029] Data Support: Internal forces were analyzed and node verification was performed using the Midas 3D model. The bolts for the flange connection were determined to be 4M14 (stainless steel), and the shear bolts for the flange were 2M12 (stainless steel). Shear force was not calculated in the model. Since the outer diameter of the inner liner and the inner diameter of the outer sleeve are nearly identical, they are considered as an equal-strength connection. Under bending, the tension bolt N... t(Counterhead bolt), its size is controlled by it. For example... Figure 4 As shown.

[0030] This invention uses a pre-reinforced node liner tube with an external sleeve flange as an auxiliary method to achieve the purpose of semi-rigid connection of aluminum alloy beams and columns, solves the connection problem between square tube columns and round tube beams in prefabricated aluminum alloy frames, meets the requirements of semi-rigid connection of nodes under the specific premise of architectural aesthetics, and makes spatial constraints meet the requirements of overall structural stability.

[0031] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An assembled modular lining pipe auxiliary flange type semi-rigid node connection structure, comprising an aluminum alloy square tube column (1) and an aluminum alloy circular tube cross beam (2) in an assembled frame unit, the aluminum alloy square tube column (1) is connected with the aluminum alloy circular tube cross beam (2) on both sides of the secondary direction, characterized in that: The aluminum alloy square tube column (1) is transversely provided with a node inner lining tube (4), the node inner lining tube (4) extends out of both sides of the secondary direction of the aluminum alloy square tube column (1) and is fixedly connected with the aluminum alloy square tube column (1), the aluminum alloy round tube cross beam (2) on the corresponding side of the aluminum alloy square tube column (1) is sleeved on the outer part of the extended end of the node inner lining tube (4), the outer part of the end of the aluminum alloy round tube cross beam (2) is sleeved with a sleeve flange (3), the sleeve flange (3) is fixedly connected with the web of the aluminum alloy square tube column (1), the sleeve flange (3), the aluminum alloy round tube cross beam (2) and the node inner lining tube (4) are connected through penetration of a bolt (6); The node inner lining tube (4) is fixedly connected with the aluminum alloy square tube column (1) through welding, and the node inner lining tube (4) is an inner sleeve made of reinforced stainless steel; The sleeve flange (3) comprises a flange plate (3-1) and a flange sleeve (3-2), the flange plate (3-1) is fixedly connected with the secondary direction web of the aluminum alloy square tube column (1) through a screw (5), the flange sleeve (3-2) is sleeved on the end of the aluminum alloy round tube cross beam (2), the outer surface of the flange sleeve (3-2) is circumferentially and symmetrically provided with flange auxiliary cover plates (3-3), and the flange auxiliary cover plates (3-3) of the sleeve flange (3), the corresponding flange sleeve (3-2), the aluminum alloy round tube cross beam (2) and the node inner lining tube (4) are all provided with holes for penetration of the bolt (6).

2. The fabricated modular lining tube assisted flanged semi-rigid nodal connection structure according to claim 1, characterized in that: The sleeve flange (3) is a cast aluminum flange.

3. The fabricated modular lining tube assisted flanged semi-rigid node connection structure according to claim 1, characterized in that: The screw (5) is a stainless steel countersunk head screw.

4. The fabricated modular lining tube assisted flanged semi-rigid node connection structure according to claim 1, characterized in that: The bolt (6) is a limiting shear-resistant bolt.

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