Assembled reinforced composite foam sandwich tube lattice column and assembly process thereof

Abstract

The present invention discloses an assembled reinforced composite foam sandwich tube lattice column and its assembly process, belonging to the technical field of fiber reinforced composite material structures. The lattice column includes at least two column limbs, each of which is connected to at least one adjacent column limb by a tie material, and each of which includes a plurality of column sections arranged at intervals and a metal connector at a node between two adjacent column sections. The column section includes a reinforced composite foam sandwich tube and a composite neck flange for connecting the corresponding metal connector at the node; the tie material includes a composite pultruded tube and a metal tube located at both ends of the composite pultruded tube and used to connect the corresponding metal connector at the node. The present invention adopts assembled column limbs to solve the problems of long assembly and erection time, large workload and difficult transportation caused by the large number of types and weight of emergency pier components, and meets the needs of rapid bridge repair in emergency conditions.

Description

Technical Field

[0001] The invention belongs to the technical field of fiber reinforced composite material structures, and in particular relates to an assembled reinforced composite foam sandwich tube lattice column and an assembly process thereof. Background Art

[0002] Fiber-reinforced composite materials have the characteristics of light weight, high strength and corrosion resistance. The application of composite materials in the engineering field is increasing.

[0003] At present, most of the emergency bridge piers in the existing technology are steel structures, using H-shaped steel or square steel as the main load-bearing columns, and assembled into a lattice structure through channel steel transverse connection. There are many types of components, large volume and weight, which are difficult to meet the requirements of hoisting and transportation under various conditions, resulting in a long time for the assembly and erection of emergency bridge piers, a large workload, and sometimes even unable to reach the designated area due to transportation difficulties. In addition, steel components are prone to corrosion, high maintenance costs, and short service life.

[0004] Therefore, in the field of fiber-reinforced composite material structure technology, how to develop and design lattice columns that are lightweight, corrosion-resistant, easy to carry and erect, and reliably connected has become a technical problem that technical personnel in this field need to solve urgently. This is also a research hotspot and focus in the current field of fiber-reinforced composite material structure technology, and it is also the starting point for the completion of the present invention. Summary of the invention

[0005] To this end, the first technical problem to be solved by the present invention is to provide an assembled reinforced composite foam sandwich tube lattice column to solve the technical problems of long assembly and erection time, large workload, difficult transportation and corrosion resistance of emergency piers caused by the large number and weight of existing emergency pier components.

[0006] As a technical concept, the second technical problem to be solved by the present invention is to provide an assembly process for assembled reinforced composite foam sandwich tube lattice columns.

[0007] In order to solve the first technical problem mentioned above, the technical solution of the present invention is: an assembled reinforced composite foam sandwich tube lattice column, comprising at least two column limbs, each of the column limbs is connected to at least one adjacent column limb by a tie material, each of the column limbs comprises a plurality of column sections arranged at intervals and a metal connector at the node between two adjacent column sections, the column section comprises a reinforced composite foam sandwich tube and a composite neck flange for connecting the corresponding metal connector at the node, the reinforced composite foam sandwich tube comprises a tube body and composite flanges respectively located at both ends of the tube body, the composite neck flange is arranged at the intersection of the tube body and the composite flange at each end; the tie material comprises a composite pultruded tube and metal tubes located at both ends of the composite pultruded tube and used to connect the corresponding metal connector at the node.

[0008] As an improvement, the composite neck flange and the metal connector at the node are connected to a first fastener via a perforated metal ring; the perforated metal ring is arranged on a side of the flange portion of the composite neck flange away from the metal connector at the node.

[0009] As an improvement, the metal pipe and the metal connector at the node are connected via a second fastener.

[0010] As a further improvement, the metal tube has a hole-leaving protrusion so as to form a single-ear and double-ear joint with the metal connector at the node and be connected through the second fastener; the metal tube is a preloaded tooth metal tube, and the inner wall of the metal tube is spirally toothed to have internal teeth, and the internal teeth cooperate with the external teeth of the composite pultruded tube.

[0011] As a further improvement, the metal connector at the node includes two upper and lower metal flange parts, a middle cylindrical part and a side extension part. The metal flange part is adapted to the shape of the composite flange plate. The side extension part has a number of circular holes as part of the single-ear and double-ear joint according to the number of the metal pipes to be connected.

[0012] As a further improvement, the metal connector at the node is an integrally forged steel component or an aluminum alloy component.

[0013] As an improvement, the barrel comprises a composite barrel outer skin, a composite barrel inner skin and a cylindrical core layer arranged therebetween; or the barrel comprises a composite barrel outer skin, a composite barrel inner skin and a cylindrical core layer arranged therebetween, and the inner and outer surfaces of the cylindrical core layer are both provided with a plurality of axially extending composite ribs;

[0014] The composite flange is formed by the composite barrel outer skin and the composite barrel inner skin being turned outward in the radial direction; or the composite flange is formed by the composite barrel inner skin being turned outward in the radial direction;

[0015] The composite barrel outer skin and the composite barrel inner skin are made of fiber-reinforced resin-based composite materials.

[0016] As an improvement, the composite neck flange comprises a neck, a tapered portion and a flange portion, the tapered portion comprises a composite inner skin, a composite outer skin and a plurality of inclined foam strips arranged therebetween, a foam strip outer skin is arranged outside the inclined foam strip, the flange portion is formed by radially outwardly flanging the composite inner skin and the composite outer skin, the neck comprises a cylindrical inner skin and a cylindrical outer skin, the cylindrical inner skin is integrally arranged with the composite inner skin, and the cylindrical outer skin is integrally arranged with the composite outer skin;

[0017] Alternatively, the composite neck flange includes a neck, a tapered portion and a flange portion, the tapered portion includes a composite outer skin and a plurality of inclined foam strips arranged between the composite outer skin and the reinforced composite foam sandwich tube, a foam strip outer skin is arranged outside the inclined foam strips, the flange portion is formed by radially outwardly flanging the composite outer skin, the neck includes a cylindrical outer skin, and the cylindrical outer skin is integrally arranged with the composite outer skin.

[0018] As an improvement, the material of the composite pultruded tube includes impregnating resin and glass fiber, the impregnating resin includes resin, filler and additives, and the glass fiber is untwisted glass fiber roving.

[0019] In order to solve the above second technical problem, the technical solution of the present invention is: an assembly process of an assembled reinforced composite foam sandwich tube lattice column, using the above assembled reinforced composite foam sandwich tube lattice column, comprising the following steps:

[0020] (1) First, select the assembly reference surface and set the assembly tire frame;

[0021] (2) Select the assembly reference plane according to the drawings and relevant requirements. The relevant requirements are as follows: height direction: the lowest end of the lattice column is the assembly reference plane; length and width direction: center line;

[0022] (3) After the above-mentioned reference surface is selected, the overall assembly frame is selected. The lattice column segmented assembly frame is set according to the above-mentioned reference. First, the projection position line of the center line and the outer line of the lattice column and the position line of the frame template are marked on the platform. After marking, self-inspection and mutual inspection are carried out, and then submitted to the full-time inspector for acceptance. Only after passing the inspection can the assembly of the frame template be set;

[0023] (4) Then the tire frame template is set up. The tire frame template is cut by CNC to ensure assembly accuracy. Then the tire frame template is erected strictly according to the template setting position line on the platform. The upper elevation of the tire frame template must be guaranteed to be no more than 1mm. The excess must be corrected. The tire frame template must have sufficient rigidity and strength. After the tire frame is set up, it must be accepted and qualified before it can be used;

[0024] (5) After the tire frame template is set, the assembly of the lattice columns begins;

[0025] (6) preparing the components involved in the lattice column, namely, the column section, the metal connector at the node and the tie material, and connecting the composite pultruded tube as the tie material with the metal tube in advance;

[0026] (7) Then, the two ends of the first column section from the bottom of the lattice column are assembled together with the metal connectors at the node, and are placed in place on the tire frame according to the requirements of the column limb spacing;

[0027] (8) After the column limbs are placed in place, the tie material is connected to the metal connector at the node to complete the assembly of the first section;

[0028] (9) Repeat steps (7) to (8) to complete the assembly of the remaining segments. After all segments are assembled, the entire assembled reinforced composite foam sandwich tube lattice column is assembled;

[0029] (10) Finally, integrity measurement is carried out using a combination of ground samples and total station, and acceptance is completed.

[0030] After adopting the above technical solution, the beneficial effects of the present invention are:

[0031] (1) The column section of the present invention adopts reinforced composite foam sandwich tubes and composite neck flanges, and the tie materials adopt composite pultruded tubes and metal tubes. Compared with traditional steel lattice columns, fiber reinforced composite lattice columns have the characteristics of low cost, light weight, high strength, and corrosion resistance. The weight, durability, and economy of the column limbs are optimized, and they are suitable as emergency bridge piers. At the same time, the lattice column of the present invention is assembled by column sections, metal connectors at nodes, and tie materials. Compared with traditional lattice columns, the assembled lattice column has the advantages of small component size and fewer component types, is easy to transport and erect, and has reliable connections, which meets the needs of bridge emergency repairs.

[0032] (2) The present invention can change the number of column limbs according to actual needs by simply changing the shape of the metal connectors at the nodes and the length of the tie materials, which facilitates the flexible design of the lattice column. The lattice column can be designed as a three-limb or four-limb lattice column, or as a pagoda-style variable-section lattice column.

[0033] (3) Since the composite neck flange is connected to the metal connector at the node through a perforated metal ring and the first fastener, the perforated metal ring effectively protects the composite neck flange, thereby preventing the composite neck flange from being damaged prematurely and reducing its bearing capacity, thereby making the connection of the column limbs more reliable.

[0034] (4) Since the metal pipe has a hole-retaining protrusion to form a single-ear and double-ear joint with the metal connector at the node and is connected through the second fastener, the connection between the metal pipe and the metal connector at the node is simple and reliable.

[0035] (5) Since the metal tube is a preloaded tooth metal tube, the inner wall of the metal tube is processed with spiral teeth to have internal teeth. The internal teeth cooperate with the external teeth of the composite pultruded tube. The interlaminar shear strength of the composite teeth is increased by applying a preload, so that the composite material can transmit a larger load at the connection. The bearing capacity of the connection is significantly higher than that of bolt connection and bonding technology.

[0036] (6) Since the body of the reinforced composite foam sandwich tube includes a composite material outer skin, a composite material inner skin and a cylindrical core layer arranged therebetween, the inner and outer surfaces of the cylindrical core layer are provided with a plurality of axially extending composite material ribs, the composite material ribs can effectively share the external load, enhance the anti-buckling performance of the inner and outer skins of the composite material tube body, and improve the bearing capacity.

[0037] (7) Since the conical portion of the composite neck flange includes a composite inner skin, a composite outer skin and a plurality of inclined foam strips arranged therebetween, a foam strip outer skin is arranged on the outside of the inclined foam strips; the foam strip outer skin is integrally solidified with the composite inner skin, the composite outer skin and the foam strips through resin bonding, which effectively limits the prying force; the composite inner skin and the composite outer skin are reinforced by the grid reinforcement formed by the foam strip outer skin, which can effectively prevent the composite inner skin and the composite barrel outer skin from local buckling, and is conducive to effectively bearing various loads at the lattice column nodes. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0039] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0040] Figure 1 is an overall schematic diagram of a lattice column provided by an embodiment of the present invention;

[0041] Figure 2 is an enlarged exploded schematic diagram of a node of a lattice column provided by an embodiment of the present invention;

[0042] Figure 3 is a schematic structural diagram of a column section provided by an embodiment of the present invention;

[0043] Figure 4 yes Figure 3 Middle AA section enlarged schematic diagram (only one end of the column section is shown in the figure);

[0044] Figure 5 yes Figure 3 The middle BB section is an enlarged schematic diagram;

[0045] Figure 6 It is an enlarged schematic cross-sectional view of the barrel;

[0046] Figure 7 is a stereoscopic view of the beveled foam slats and the outer skin of the foam slats (only a portion of the outer skin of the foam slats is shown);

[0047] In the figure: 1-column limb, 11-column section, 111-reinforced composite foam sandwich tube, 1111-tube body, 11111-composite tube body outer skin, 11112-composite tube body inner skin, 11113-cylindrical core layer, 11114-composite ribs, 1112-composite flange, 112-composite neck flange, 1121-neck, 11211-cylindrical inner skin, 11212-cylindrical outer skin, 1122- Conical part, 11221-composite material inner skin, 11222-composite material outer skin, 11223-inclined foam strips, 11224-foam strip outer skin, 1123-flange part, 12-metal connector at the node, 121-metal flange part, 122-middle cylindrical part, 123-side extension part, 2-fixing material, 21-composite material pultruded tube, 22-metal tube, 221-hole protrusion, 3-metal ring with hole, 4-bolt, 5-pin. DETAILED DESCRIPTION

[0048] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. 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 creative work are within the scope of protection of the present invention.

[0049] The terms such as "front", "back", "left", "right", "inside", "outside", "middle", etc. cited in this specification are only for the convenience of description and are not intended to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should be regarded as within the scope of implementation of the present invention without substantially changing the technical content.

[0050] like Figures 1 to 4 As shown together, an assembled reinforced composite foam sandwich tube lattice column includes two column limbs 1, and a column limb 1 is connected to another column limb 1 through a tie material 2. It should be noted that those skilled in the art can select the number of column limbs 1 according to actual needs, such as three or more column limbs, and each column limb can be connected to one or more adjacent column limbs through a tie material, so as to improve the overall strength of the lattice column.

[0051] Each column limb 1 includes a plurality of column sections 11 arranged at intervals and metal connectors 12 arranged at the nodes between two adjacent column sections 11. In the present embodiment, the number of column sections 11 of each column limb 1 is six. It should be noted that those skilled in the art may select the number of column sections 11 according to actual needs. The column section 11 includes a reinforced composite foam sandwich tube 111 and a composite neck flange 112 for connecting the corresponding metal connectors 12 at the nodes. The reinforced composite foam sandwich tube 111 includes a tube body 1111 and composite flanges 1112 respectively located at both ends of the tube body 1111. A composite neck flange 112 is provided at the intersection of the tube body 1111 and the composite flanges 1112 at each end. The attachment material 2 includes a composite pultruded tube 21 and metal tubes 22 located at both ends of the composite pultruded tube 21 and used to connect the corresponding metal connectors 12 at the nodes. Preferably, the material of the composite pultruded tube 21 includes impregnated resin and glass fiber, the impregnated resin includes resin, filler and additives, and the glass fiber is untwisted glass fiber roving.

[0052] In this way, the column section 11 of the present invention adopts a reinforced composite foam sandwich tube 111 and a composite material neck flange 112, and the tie material 2 adopts a composite pultruded tube 21 and a metal tube 22. Compared with the traditional steel lattice column, the lattice column of the embodiment of the present invention has the characteristics of low cost, light weight, high strength, corrosion resistance, etc. The weight, durability and economy of the column member 1 are optimized, and it is suitable as an emergency bridge pier; at the same time, the lattice column provided by the embodiment of the present invention is assembled by column sections 11, metal connectors 12 at the nodes and tie materials 2. Compared with the traditional lattice column form, the assembled lattice column has the advantages of small component size and fewer component types, is easy to carry and erect, and has reliable connection, which meets the needs of bridge emergency repair.

[0053] The present invention can change the number of column limbs 1 according to actual needs by only changing the shape of the metal connector 12 at the node and the length of the tie material 2, which is convenient for flexible design of the lattice column. It can be designed as a lattice column with three limbs or four limbs, or as a pagoda-type variable-section lattice column.

[0054] Specifically, in this embodiment, combined with Figure 4 and Figure 6 The barrel 1111 includes a composite barrel outer skin 11111, a composite barrel inner skin 11112 and a cylindrical core layer 11113 disposed therebetween, and the inner and outer surfaces of the cylindrical core layer 11113 are both provided with twelve axially extending composite ribs 11114. It should be noted that the composite ribs 11114 can also be other numbers, and those skilled in the art can select them according to actual needs. The composite ribs 11114 can effectively share external loads, enhance the anti-buckling performance of the composite barrel inner skin 11112 and the composite barrel outer skin 11111, and improve the bearing capacity.

[0055] The composite flange 1112 is formed by radially outwardly flanging the composite barrel inner skin 11112.

[0056] The composite barrel outer skin 11111 and the composite barrel inner skin 11112 are composed of fiber-reinforced resin-based composite materials.

[0057] In other embodiments, the barrel 1111 may not be provided with composite material ribs, that is, the barrel comprises a composite material barrel outer skin, a composite material barrel inner skin and a cylindrical core layer arranged therebetween. In other embodiments, the composite material flange 1112 may also be formed by radially outwardly turning up the composite material barrel outer skin and the composite material barrel inner skin. In addition, in other embodiments, a steel plate may also be embedded between the composite material barrel outer skin and the composite material barrel inner skin.

[0058] In this embodiment, combined with Figure 4 , Figure 5 and Figure 7 The composite neck flange 112 includes a neck 1121, a tapered portion 1122 and a flange portion 1123. The tapered portion 1122 includes a composite inner skin 11221, a composite outer skin 11222 and ten inclined foam strips 11223 arranged therebetween. It should be noted that the inclined foam strips 11223 can also be other numbers, and those skilled in the art can select according to actual needs. The outer portion of the inclined foam strips 11223 is provided with a foam strip outer skin 11224. The flange portion 1123 is formed by radially outwardly turning up the composite inner skin 11221 and the composite outer skin 11222. The neck 1121 includes a cylindrical inner skin 11211 and a cylindrical outer skin 11212. The cylindrical inner skin 11211 is integrally provided with the composite inner skin 11221, and the cylindrical outer skin 11212 is integrally provided with the composite outer skin 11222. The foam slat outer skin 11224, the composite material inner skin 11221, the composite material outer skin 11222 and the foam slat 11223 are integrally cured through resin bonding, which effectively limits the prying force. The composite material inner skin 11221 and the composite material outer skin 11222 are reinforced by the grid formed by the foam slat outer skin 11224, which can effectively prevent the composite material inner skin 11221 and the composite material barrel outer skin 11111 from local buckling, which is conducive to effectively bearing various loads at the lattice column nodes.

[0059] like Figure 2 and Figure 4 As shown together, in this embodiment, the composite neck flange 112 is connected to the metal connector 12 at the node through a perforated metal ring 3 and a first fastener. The first fastener is preferably a bolt 4 and a nut. The bolt 4 can be a common steel bolt or a high-strength steel bolt. Of course, the first fastener can also be other fasteners that can be realized by a person skilled in the art. The perforated metal ring 3 is arranged on the flange portion 1123 of the composite neck flange 112, away from the metal connector 12 at the node. The perforated metal ring 3 effectively protects the composite neck flange 112, can prevent the composite neck flange 112 from being damaged prematurely and reducing the bearing capacity, and makes the connection of the column limb 1 more reliable.

[0060] In this embodiment, the metal tube 22 is connected to the metal connector 12 at the node by a second fastener, and the second fastener is preferably a pin 5. Of course, the second fastener can also be other fasteners that can be realized by those skilled in the art, which will not be described in detail here. Of course, as an alternative, the metal tube 22 and the metal connector 12 at the node can also be connected by welding or other methods.

[0061] In this embodiment, the metal tube 22 has a hole-retaining protrusion 221 so as to form a single-ear and double-ear joint with the metal connector 12 at the node and be connected through the pin 5, so that the connection between the metal tube 22 and the metal connector 12 at the node is simple and reliable; the metal tube 22 is a preloaded tooth metal tube, and the inner wall of the metal tube 22 is spirally processed to have internal teeth. The internal teeth cooperate with the external teeth of the composite pultruded tube 21, and the interlaminar shear strength of the composite material teeth is increased by applying a preload, so that the composite material can transmit a larger load at the connection, and the bearing capacity of the connection is significantly higher than that of bolt connection and bonding technology.

[0062] In this embodiment, the metal connector 12 at the node includes two upper and lower metal flange parts 121, a middle cylindrical part 122 and a side extension part 123. The metal flange part 121 is adapted to the shape of the composite flange plate 1112. The side extension part 123 has a number of circular holes as part of a single-ear or double-ear joint according to the number of metal pipes 22 to be connected.

[0063] The metal connector 12 at the node is an integrally forged steel component or an aluminum alloy component. Of course, the metal connector 12 at the node can also be made of other metal components that can ensure the strength of the node.

[0064] It should be noted that the overall height of the lattice column and the specific dimensions of each component should be determined according to actual needs, and the strength and material of the metal connector 12 at the node, and the strength of the bolt 4 and the pin 5 should also be flexibly selected according to actual conditions.

[0065] The embodiment of the present invention further discloses an assembly process of an assembled reinforced composite foam sandwich tube lattice column, which adopts the assembled reinforced composite foam sandwich tube lattice column, and takes a four-limb lattice column as an example, and specifically comprises the following steps:

[0066] (1) First, select the assembly reference surface and set the assembly tire frame;

[0067] (2) Select the assembly reference plane according to the drawings and relevant requirements. The relevant requirements are as follows: height direction: the lowest end of the lattice column is the assembly reference plane; length and width direction: center line;

[0068] (3) After the above-mentioned reference surface is selected, the overall assembly frame is selected. The lattice column segmented assembly frame is set according to the above-mentioned reference. First, the projection position line of the center line and the outer line of the lattice column and the position line of the frame template are marked on the platform. After marking, self-inspection and mutual inspection are carried out, and then submitted to the full-time inspector for acceptance. Only after passing the inspection can the assembly frame template be set;

[0069] (4) Then set the tire frame template. The tire frame template is cut by CNC to ensure assembly accuracy. Then, the tire frame template is set up strictly according to the template setting position line on the platform. The upper elevation of the tire frame template must be guaranteed to be no more than 1mm. The excess must be corrected. The tire frame template must have sufficient rigidity and strength. After the tire frame is set, it must be accepted and qualified before it can be used;

[0070] (5) After the frame template is set, the assembly of the lattice columns begins;

[0071] (6) Prepare the components involved in the lattice column, namely, the column section 11, the metal connector 12 at the node, and the tie material 2, and connect the composite pultruded tube 21 and the metal tube 22 as the tie material 2 in advance;

[0072] (7) Then, the two ends of the four first column sections from the bottom of the lattice column are assembled with the metal connectors 12 at the nodes, and are placed in place on the frame according to the requirements of the column limb spacing;

[0073] (8) After the above-mentioned column limbs are placed in place, the tie material 2 is connected to the metal connector 12 at the node to complete the assembly of the first section;

[0074] (9) Repeat steps (7) to (8) to complete the assembly of the remaining segments. After all segments are assembled, the entire assembled reinforced composite foam sandwich tube lattice column is assembled;

[0075] (10) Finally, integrity measurement is carried out using a combination of ground samples and total station, and acceptance is completed.

[0076] In summary, the assembled reinforced composite foam sandwich tube lattice column and its assembly process provided by the embodiments of the present invention are lightweight, corrosion-resistant, easy to carry and erect, and have reliable connections. The method of using assembled column limbs instead of full-length column limbs solves the problems of long assembly and erection time, large workload, and difficult transportation of emergency piers caused by the large number and type of emergency pier components and their heavy weight. This can meet the needs of rapid repair of bridges in emergency situations.

[0077] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. An assembled reinforced composite foam sandwich tube lattice column, comprising at least two column limbs, each of which is connected to at least one adjacent column limb by a tie material, characterized in that: Each of the column limbs comprises a plurality of column sections arranged at intervals and metal connectors arranged at the nodes between two adjacent column sections, the column section comprises a reinforced composite foam sandwich tube and a composite neck flange for connecting the corresponding metal connectors at the nodes, the reinforced composite foam sandwich tube comprises a tube body and composite flanges respectively located at both ends of the tube body, and the intersection of the tube body and the composite flanges at each end is provided with the composite neck flange; the tie material comprises a composite pultruded tube and metal tubes located at both ends of the composite pultruded tube and used to connect the corresponding metal connectors at the nodes; The composite neck flange and the metal connector at the node are connected to a first fastener via a perforated metal ring; the perforated metal ring is arranged on a side of the flange portion of the composite neck flange away from the metal connector at the node; The metal pipe is connected to the metal connector at the node via a second fastener; The metal tube has a hole-retaining protrusion so as to form a single-ear and double-ear joint with the metal connector at the node and be connected through the second fastener; the metal tube is a preloaded force tooth metal tube, and the inner wall of the metal tube is processed with spiral teeth to have internal teeth, and the internal teeth match the external teeth of the composite pultruded tube; The metal connector at the node includes two upper and lower metal flange parts, a middle cylindrical part and a side extension part, the metal flange part is adapted to the shape of the composite flange, and the side extension part is provided with a number of circular holes as a part of the single-ear and double-ear joint according to the number of the metal pipes to be connected; The materials of the composite pultruded tube include impregnating resin and glass fiber, the impregnating resin includes resin, filler and additives, and the glass fiber is untwisted glass fiber roving.

2. The assembled reinforced composite foam sandwich tube lattice column according to claim 1 is characterized in that: The metal connector at the node is an integrally forged steel component or an aluminum alloy component.

3. The assembled reinforced composite foam sandwich tube lattice column according to claim 1 is characterized in that: The barrel comprises a composite barrel outer skin, a composite barrel inner skin and a cylindrical core layer arranged therebetween; or the barrel comprises a composite barrel outer skin, a composite barrel inner skin and a cylindrical core layer arranged therebetween, and the inner and outer surfaces of the cylindrical core layer are both provided with a plurality of axially extending composite ribs; The composite flange is formed by the composite barrel outer skin and the composite barrel inner skin being turned outward in the radial direction; or the composite flange is formed by the composite barrel inner skin being turned outward in the radial direction; The composite barrel outer skin and the composite barrel inner skin are made of fiber-reinforced resin-based composite materials.

4. The assembled reinforced composite foam sandwich tube lattice column according to claim 1 is characterized in that: The composite neck flange comprises a neck, a tapered portion and a flange portion, the tapered portion comprises a composite inner skin, a composite outer skin and a plurality of inclined foam strips arranged therebetween, a foam strip outer skin is arranged outside the inclined foam strips, the flange portion is formed by radially outwardly turning up the composite inner skin and the composite outer skin, the neck comprises a cylindrical inner skin and a cylindrical outer skin, the cylindrical inner skin is integrally arranged with the composite inner skin, and the cylindrical outer skin is integrally arranged with the composite outer skin; Alternatively, the composite neck flange includes a neck, a tapered portion and a flange portion, the tapered portion includes a composite outer skin and a plurality of inclined foam strips arranged between the composite outer skin and the reinforced composite foam sandwich tube, a foam strip outer skin is arranged outside the inclined foam strips, the flange portion is formed by radially outwardly flanging the composite outer skin, the neck includes a cylindrical outer skin, and the cylindrical outer skin is integrally arranged with the composite outer skin.

5. An assembly process for assembled reinforced composite foam sandwich tube lattice column, characterized in that: The assembled reinforced composite foam sandwich tube lattice column according to any one of claims 1 to 4 comprises the following steps: (1) First, select the assembly reference surface and set the assembly tire frame; (2) Select the assembly reference plane according to the drawings and relevant requirements. The relevant requirements are as follows: height direction: the lowest end of the lattice column is the assembly reference plane; length and width direction: center line; (3) After the above-mentioned reference surface is selected, the overall assembly frame is selected. The lattice column segmented assembly frame is set according to the above-mentioned reference. First, the projection position line of the center line and the outer line of the lattice column and the position line of the frame template are marked on the platform. After marking, self-inspection and mutual inspection are carried out, and then submitted to the full-time inspector for acceptance. Only after passing the inspection can the assembly of the frame template be set; (4) Then the tire frame template is set up. The tire frame template is cut by CNC to ensure assembly accuracy. Then the tire frame template is erected strictly according to the template setting position line on the platform. The upper elevation of the tire frame template must be guaranteed to be no more than 1mm. The excess must be corrected. The tire frame template must have sufficient rigidity and strength. After the tire frame is set up, it must be accepted and qualified before it can be used; (5) After the tire frame template is set, the assembly of the lattice columns begins; (6) preparing the components involved in the lattice column, namely, the column section, the metal connector at the node and the tie material, and connecting the composite pultruded tube as the tie material with the metal tube in advance; (7) Then, the two ends of the first column section from the bottom of the lattice column are assembled together with the metal connectors at the node, and are placed in place on the tire frame according to the requirements of the column limb spacing; (8) After the column limbs are placed in place, the tie material is connected to the metal connector at the node to complete the assembly of the first section; (9) Repeat steps (7) to (8) to complete the assembly of the remaining segments. After all segments are assembled, the entire assembled reinforced composite foam sandwich tube lattice column is assembled; (10) Finally, integrity measurement is carried out using a combination of ground samples and total station, and acceptance is completed.

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