A steel pipe column mortise and tenon joint node and construction method thereof

Abstract

The present invention provides a steel pipe column mortise and tenon joint node and a construction method thereof, comprising an outer steel pipe column, an inner steel section, an inner butt steel pipe, a reinforcing steel ring, a steel mortise and tenon joint member and an internal spring, wherein the steel mortise and tenon joint member has good deformation recoverability; the reinforcing steel ring is beneficial to enhancing the node annular stiffness and the stress diffusion of the inner steel pipe in the opening area, while the internal spring can effectively transmit and absorb the node energy during the swinging process, thereby preventing the steel mortise and tenon joint member from being excessively deformed, and ensuring the force balance of the node, thereby the butt joint method of the splicing node of the present invention not only ensures vertical force transmission, but also prevents excessive separation deformation; the provision of the internal spring is beneficial to the deformation recovery of the node, and has strong anti-seismic ability, each component can be processed in the factory and then transported to the site for butt jointing, the overall installation is convenient, and the higher stability can also reduce the frequency of later maintenance, thereby ensuring the safety of the node and the overall stability of the component.

Description

Technical Field

[0001] The invention relates to the technical field of building structures, and in particular to a steel pipe column mortise and tenon joint and a construction method thereof. Background Art

[0002] In modern building structures, steel pipe columns are an important load-bearing component, and the design and construction methods of their connection nodes have a vital impact on the stability and safety of the entire structure. Traditional steel pipe column connection methods mostly use direct welding or bolting. Although these methods are simple to construct, they also have some shortcomings, such as low structural strength and stability, large on-site workload, and frequent later maintenance. Therefore, it is particularly important to have a steel pipe column connection node and its construction method that can not only ensure structural strength and stability, but also simplify the construction process, reduce costs, and facilitate later maintenance.

[0003] In view of this, the applicant filed this application after studying the existing technology. Summary of the invention

[0004] The present invention provides a steel pipe column mortise and tenon joint and a construction method thereof, aiming to improve at least one of the above-mentioned technical problems.

[0005] In order to solve the above technical problems, the present invention provides a steel pipe column mortise and tenon joint node, comprising two outer steel pipe columns connected in an upper and lower manner, and also comprising an inner steel section, an inner butt steel pipe, a reinforcing steel ring, a steel mortise and tenon joint and an internal spring; wherein the inner steel section comprises an upper steel section and a lower steel section, the upper steel section is provided with a butt section and a first butt hole, the lower steel section is provided with a butt interface and a second butt hole, the butt section and the butt interface can be coaxially adapted and connected; the outer peripheral side of the inner steel section is segmented to form flanges of three different widths, and the flanges are segmentedly welded to the outer steel pipe column, the inner butt steel pipe and the reinforcing steel ring; the inner butt The steel pipes are arranged in two groups in an upper and lower manner, and the sides are provided with half-openings and limiting guide components, and the half-openings of the upper and lower groups of internal butt-jointed steel pipes are arranged correspondingly for connecting steel mortise and tenon connectors; wherein, the half-opening is structured to be able to vertically limit the steel mortise and tenon connectors; two groups of reinforcing steel rings are arranged, which are respectively welded on the inner walls of the two internal butt-jointed steel pipes; the built-in spring connection is arranged between the upper and lower reinforcing steel rings; the reinforcing steel ring is provided with a connecting slot for connecting the built-in spring; the steel mortise and tenon connector is provided with a universal coupling; the butt joint area of ​​the outer steel pipe column is provided with a connecting hole, and the connecting hole is used to connect the universal coupling.

[0006] As a further optimization, the first docking hole is an elliptical hole arranged longitudinally, and the second docking hole is a circular hole, wherein the upper end of the first docking hole is aligned with the upper end of the second docking hole.

[0007] As a further optimization, the butt ends of the upper and lower outer steel pipe columns are provided with matching notches for interlocking connection.

[0008] As a further optimization, the rod end of the universal coupling is provided with a threaded hole, and the end head is provided with a hexagonal screw hole; it also includes a hexagonal rivet nut, which is connected and arranged between the universal coupling and the connecting hole.

[0009] As a further optimization, the first docking hole and the second docking hole are provided with a limiting guide groove; it also includes a high-strength shear-resistant member, which is used to connect the first docking hole and the second docking hole. A limiting block is protruding from the side end of the high-strength shear-resistant member, and the limiting block is adapted to the limiting guide groove.

[0010] As a further optimization, the built-in spring is an M-shaped spring, and connecting parts that can be adapted and connected to the connecting slots are provided at the upper two ends and the lower middle position of the built-in spring.

[0011] As a further optimization, two universal couplings are provided on the steel mortise and tenon joint, and are respectively connected to the connecting holes on the upper and lower outer steel pipe columns.

[0012] As a further optimization, the steel mortise and tenon joints are made of shape memory alloys.

[0013] The present invention also provides a construction method for the above-mentioned steel pipe column mortise and tenon joint node, comprising the following steps:

[0014] Step 1: Prefabricate each component in the factory;

[0015] Step 2: Connect the outer steel pipe column, connect the steel mortise and tenon connector to the corresponding connection hole through the universal coupling, connect it to the docking area, adapt the half opening of the inner docking steel pipe to the steel mortise and tenon connector, and then weld it to the outer steel pipe column;

[0016] Step 3: After assembling the internal spring between the two reinforcing steel rings, weld it to the inner side of the internal butt steel pipe, wherein the reinforcing steel ring is specifically welded in the middle position of the half opening;

[0017] Step 4: Load the upper and lower steel sections from both sides of the outer steel pipe column, connect them through the butt joint section and the butt joint to form the inner steel section, and then weld and fix them with the outer steel pipe column;

[0018] Step 5: After hoisting and fixing the connected steel pipe column vertically to the foundation, make adjustments and acceptance.

[0019] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0020] The present application provides a steel pipe column mortise and tenon joint node and a construction method thereof, comprising an outer steel pipe column, an inner steel section, an inner butt steel pipe, a reinforcing steel ring, a steel mortise and tenon connector and an internal spring, wherein the steel mortise and tenon connector is made of a shape memory alloy, and SMA has good deformation recoverability; the reinforcing steel ring is beneficial to enhancing the node annular stiffness and the stress diffusion of the internal steel pipe in the opening area, and at the same time, the node energy in the swinging process can be effectively transmitted and absorbed through the internal spring, thereby preventing the steel mortise and tenon connector from being excessively deformed and ensuring the force balance of the node; a limiting guide assembly is provided near the semi-opening, and the steel mortise and tenon connector is smoothly installed to a predetermined position through a universal coupling and its lateral displacement is limited, thereby ensuring that the steel mortise and tenon connector is tightly connected during use. Therefore, the splicing nodes of the present invention use steel mortise and tenon connectors as main connectors, and the internal steel sections are butt-jointed by plug-in connection. The butt-jointing method not only ensures vertical force transmission, but also prevents excessive separation and deformation. The setting of the built-in spring is conducive to the deformation recovery of the node, and has strong earthquake resistance. All parts and components can be processed in the factory and then transported to the site for butt-jointing. The overall installation is convenient, and the higher stability can also reduce the frequency of later maintenance, which can ensure the safety of the node and the overall stability of the component. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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.

[0022] Figure 1 It is a schematic diagram of the internal structure of a mortise and tenon joint of a steel pipe column according to the present invention;

[0023] Figure 2 It is a structural schematic diagram of the connection end of the outer steel pipe column of the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the connecting hole and the hexagon socket rivet nut of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the internal steel section of the present invention;

[0026] Figure 5 is a schematic structural diagram of the first docking hole of the present invention;

[0027] Figure 6 is a schematic structural diagram of the second docking hole of the present invention;

[0028] Figure 7 It is a schematic structural diagram of the high-strength shear-resistant member of the present invention;

[0029] Figure 8 It is a structural schematic diagram of the internal butt-jointed steel pipe of the present invention;

[0030] Fig. 9 is a structural schematic diagram of the connection end of the universal coupling of the present invention;

[0031] Fig.10 It is a schematic diagram of the structure of the reinforcing steel ring and the built-in spring of the present invention;

[0032] Fig.11 It is a schematic diagram of the exploded structure of a mortise and tenon joint of a steel pipe column of the present invention;

[0033] Fig.12 is an analysis diagram obtained by finite element software in one embodiment of the present invention;

[0034] Fig.13 is an analysis diagram obtained by finite element software in another embodiment of the present invention;

[0035] Markings in the figure: 1. Internal steel; 1.1. Upper steel; 1.1.1. Docking section; 1.1.2. First docking hole; 1.2. Lower steel; 1.2.1. Second docking hole; 1.3. High-strength shear-resistant member; 1.3.1. Limit block; 2. Internal docking steel pipe; 2.1. Half-opening; 2.2. Limit guide assembly; 3. Reinforced steel ring; 3.1. Connecting slot; 3.2. Rivet; 4. Steel mortise and tenon connector; 4.1. Universal coupling; 5. Internal spring; 6. External steel pipe column; 6.1. Connecting hole; 6.2. Hexagonal rivet nut. DETAILED DESCRIPTION

[0036] 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 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 are within the scope of protection of the present invention.

[0037] Depend on Figures 1 to 12As shown, an embodiment of the present invention provides a steel pipe column mortise and tenon joint node, comprising two outer steel pipe columns 6 connected in an upper and lower manner, two internal steel sections 1, two internal butt steel pipes 2, two reinforcing steel rings 3, a plurality of steel mortise and tenon connectors 4 and a plurality of built-in springs 5; wherein the internal steel section 1 comprises an upper steel section 1.1 and a lower steel section 1.2, the upper steel section 1.1 is provided with a butt joint section 1.1.1 and a first butt joint hole 1.1.2, the lower steel section 1.2 is provided with a butt joint interface and a second butt joint hole 1.2.1, the cross-sectional size of the butt joint section 1.1.1 is slightly smaller than the cross-sectional size of the butt joint interface of the lower steel section 1.2 located in the middle, so that the butt joint section 1.1.1 is coaxially adaptably connected with the butt joint interface, and preferably, the outer side wall of the butt joint section 1.1.1 can be slidably plugged with the inner side wall of the butt joint interface.

[0038] Among them, Figure 2 The butt ends of the upper and lower outer steel pipe columns 6 are provided with matching notches, the notch of the upper outer steel pipe column is located on the inner side, and the notch of the lower outer steel pipe column is located on the outer side, so as to be used for chimeric connection and enhance the butt stability.

[0039] Preferably, the outer peripheral side of the internal steel section 1 is segmented to form flanges of three different widths, and the flanges are segmented and welded to the outer steel pipe column 6, the internal butt steel pipe 2 and the reinforcing steel ring 3. Preferably, in this embodiment, the outer steel pipe column 6 is a rectangular steel pipe column, and the internal steel section 1 protrudes toward each of the four sides to form three flanges, and each flange is provided with flange sections of three different widths in the axial direction, among which the section close to the connecting end of the outer steel pipe column 6 is the first flange section, and the sections away from it are the second flange section and the third flange section, and the radial width increases in sequence. In this way, as it gets closer to the inside of the outer steel pipe column 6, the radial size of the internal steel section 1 becomes larger, the roots become deeper, and the relative stability becomes better.

[0040] Furthermore, after the docking section 1.1.1 is docked with the docking interface, the first docking hole 1.1.2 matches the second docking hole 1.2.1, and can be inserted and strengthened by bolts and other structures. In this embodiment, the first docking hole 1.1.2 is an elliptical hole arranged longitudinally, wherein the upper end of the first docking hole 1.1.2 is matched with the upper end of the second docking hole 1.2.1 and aligned, and after alignment, they are inserted and connected by the high-strength shear member 1.3, thereby completing the connection of the upper and lower steel sections 1.2. By setting the first docking hole 1.1.2 as an elliptical hole and the second docking hole 1.2.1 as a circular hole, after the high-strength shear member 1.3 is installed, the upper and lower steel sections 1.2 still have axial movement space, so that while limiting, they can also absorb energy through their deformation after the built-in spring 5 is connected.

[0041] Furthermore, the first docking hole 1.1.2 and the second docking hole 1.2.1 are provided with limited guide grooves; the side end of the high-strength anti-shear member 1.3 is provided with a limited block 1.3.1, and the limited block 1.3.1 is adapted to the limited guide groove. In this way, the high-strength anti-shear member 1.3 can be rotated and locked after being inserted and installed to prevent the problem of falling off caused by vibration.

[0042] There are two groups of internal butt-jointed steel pipes 2 arranged in an upper and lower manner, and a half opening 2.1 and a limiting guide assembly 2.2 are provided on the side. The half openings 2.1 of the upper and lower groups of internal butt-jointed steel pipes 2 are arranged correspondingly. After butt-jointing, a complete opening can be formed. The size of the complete opening corresponds to the size of the steel mortise and tenon connector 4, and the width of the complete opening gradually increases from the connecting end to the two ends, so as to vertically limit the steel mortise and tenon connector 4, and then guide the connection through the limiting guide assembly 2.2 to ensure that it is tightly connected during use, so that the steel mortise and tenon connector 4 can be used as a connecting node of the upper and lower groups of internal butt-jointed steel pipes 2 after being placed in the complete opening. Preferably, the steel mortise and tenon connector 4 is made of shape memory alloy (SMA), which has good deformation recovery performance, thereby ensuring vertical force transmission as a connecting member, while also being able to yield and dissipate energy to ensure the stability of the node. In addition, since the upper and lower steel sections 1.2 are limited by the high-strength shear members 1.3, damage to the internal structure caused by excessive deformation separation can be avoided, which is beneficial to the deformation recovery of the node.

[0043] Preferably, the steel mortise and tenon connector 4 is provided with a universal coupling 4.1; the docking area of ​​the outer steel pipe column 6 is provided with a connecting hole 6.1, and the connecting hole 6.1 is used to connect the universal coupling 4.1. There are two universal couplings 4.1 on the steel mortise and tenon connector 4, which are respectively connected to the connecting holes 6.1 on the upper and lower outer steel pipe columns 6. The rod end of the universal coupling 4.1 is provided with a screw thread, and the end head is provided with a hexagonal screw hole; it also includes a hexagonal rivet nut 6.2, which is connected and arranged between the universal coupling 4.1 and the connecting hole 6.1. This type of nut can effectively prevent loosening caused by vibration or swing of the column body.

[0044] Preferably, two groups of reinforcing steel rings 3 are provided, which are respectively welded to the inner walls of the two internal butt steel pipes 2; the built-in spring 5 is connected and arranged between the upper and lower reinforcing steel rings 3; specifically, the reinforcing steel ring 3 is located in the middle position of the half opening 2.1 in the vertical direction and the top is close to the end of the flange, so as to increase the annular stiffness and stress diffusion capacity of the node.

[0045] Furthermore, the reinforcing steel ring 3 is provided with a connecting slot 3.1 for connecting the built-in spring 5. Preferably, in this embodiment, the built-in spring 5 is an M-shaped spring, and four built-in springs 5 ​​are respectively connected and arranged on each side between the two reinforcing steel rings 3, and the upper ends and the lower middle position of the built-in spring 5 are provided with connecting parts that can be matched and connected with the connecting slot 3.1.

[0046] Among them, the upper reinforcing steel ring 3 is provided with two connecting slots 3.1 for connecting the upper end connecting part of the M-type spring. The connection method is to set an open mouth in the connecting slot 3.1 to allow the upper cylindrical connecting part to be installed, and then connect it by vertical limiting through the connecting slot 3.1; the connecting slot 3.1 of the lower reinforcing steel ring 3 is in the reinforcing steel ring 3, and the connecting part of the hollow cylindrical part in the middle of the M-type spring is inserted into the connecting slot 3.1 and connected in the form of a pin through a rivet 3.2. Of course, there are many other ways of connecting the vertically limited connecting parts and the connecting slots 3.1, which will not be elaborated here. In this way, the provision of the reinforcing steel ring 3 is conducive to enhancing the annular stiffness of the node and the stress diffusion of the internal steel pipe in the opening area. At the same time, the node energy of the swinging process can be effectively transmitted and absorbed through the built-in spring 5, preventing the steel mortise and tenon joint 4 from being excessively deformed, and ensuring the force balance of the node.

[0047] Preferably, Fig.12 and Fig.13 , respectively, are the effect diagrams of the axial tension analysis of the steel pipe column when it is set as a single-sided single steel mortise and tenon connector 4 and a single-sided double steel mortise and tenon connector 4 through the finite element software. It can be seen that when the cross-section of the outer steel pipe column 6 is small, in order to prevent excessive stress concentration in the steel pipe between the connectors, it is preferably to set one mortise and tenon connector on each side. When the cross-section of the outer steel pipe column 6 is large, the number of single-sided mortise and tenon connectors can be set according to actual conditions. At the same time, in order to ensure the safety and reliability of the docking node, the vertical connection of the steel section and the spring connection between the reinforcing steel rings 3 are added inside the node. Under the combined effect of multiple connections, the vertical force transmission and anti-lateral deformation balance of the steel pipe docking node can be guaranteed.

[0048] The present invention also provides a construction method for the above-mentioned steel pipe column mortise and tenon joint node, comprising the following steps:

[0049] Step 1: Prefabricate each component in the factory;

[0050] Step 2: dock the outer steel pipe column 6, connect the steel mortise and tenon connector 4 to the corresponding connecting hole 6.1 through the universal coupling 4.1, connect to the docking area, adapt the half opening 2.1 of the internal docking steel pipe 2 to the steel mortise and tenon connector 4, and weld it to the outer steel pipe column 6; wherein, when connecting the universal coupling 4.1, connect it to the connecting hole 6.1 through the hexagonal rivet nut 6.2, and when installing, first connect the corresponding hexagonal rivet nut 6.2 from the inner side of the outer steel pipe column 6 on one side, and then dock the hexagonal rivet nut 6.2 on the other side, and finally push the universal coupling 4.1 on the same steel mortise and tenon connector 4 into the predetermined position synchronously and lock it to the preset torque.

[0051] Step 3: After assembling the internal spring 5 between the two reinforcing steel rings 3, weld it to the inner side of the internal butt steel pipe 2, wherein the reinforcing steel ring 3 is specifically welded in the middle position of the half opening 2.1.

[0052] Step 4: Insert the upper steel section 1.1 and the lower steel section 1.2 from both sides of the outer steel pipe column 6, connect them through the butt section 1.1.1 and the butt interface to form the inner steel section 1, and then weld and fix them to the outer steel pipe column 6.

[0053] Step 5: After hoisting and fixing the connected steel pipe column vertically to the foundation, make adjustments and acceptance.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A steel pipe column mortise and tenon joint, comprising two outer steel pipe columns (6) connected vertically, characterized in that: It also comprises an internal steel section (1), an internal butt-jointed steel pipe (2), a reinforcing steel ring (3), a steel mortise and tenon joint (4) and an internal spring (5); wherein the internal steel section (1) comprises an upper steel section (1.1) and a lower steel section (1.2); the upper steel section (1.1) is provided with a butt joint section (1.1.1) and a first butt joint hole (1.1.2); the lower steel section (1.2) is provided with a butt joint interface and a second butt joint hole (1.2.1); the butt joint section (1.1.1) and the butt joint interface can be coaxially adaptably connected; The outer peripheral side of the inner steel section (1) is segmented to form flanges of three different widths, and the flanges are segmentedly welded to the outer steel pipe column (6), the inner butt steel pipe (2) and the reinforcing steel ring (3); The internal butt-jointed steel pipes (2) are arranged in two groups, one above the other, and are provided with a half-opening (2.1) and a position limiting guide assembly (2.2) on the side. The half-openings (2.1) of the two groups of internal butt-jointed steel pipes (2) are arranged correspondingly and are used to connect the steel mortise and tenon connectors (4). The half-openings (2.1) are structured so as to be able to vertically limit the steel mortise and tenon connectors (4). The reinforcing steel rings (3) are provided in two groups, which are respectively welded to the inner walls of the two internal butt-jointed steel pipes (2); the internal springs (5) are connected and arranged between the upper and lower reinforcing steel rings (3); the reinforcing steel rings (3) are provided with connecting slots (3.1) for connecting the internal springs (5); The steel mortise and tenon connection piece (4) is provided with a universal coupling piece (4.1); a connection hole (6.1) is provided in a butt joint area of ​​the outer steel pipe column (6), and the connection hole (6.1) is used to connect the universal coupling piece (4.1).

2. A steel pipe column mortise and tenon joint according to claim 1, characterized in that: The first docking hole (1.1.2) is an elliptical hole arranged longitudinally, and the second docking hole (1.2.1) is a circular hole, wherein the upper end of the first docking hole (1.1.2) is aligned with the upper end of the second docking hole (1.2.1).

3. A steel pipe column mortise and tenon joint according to claim 1, characterized in that: The butt ends of the upper and lower outer steel pipe columns (6) are provided with matching notches for engaging and connecting.

4. A steel pipe column mortise and tenon joint according to claim 1, characterized in that: The rod end of the universal coupling (4.1) is provided with a threaded hole, and the end head is provided with a hexagonal screw hole; it also includes a hexagonal rivet nut (6.2), and the hexagonal rivet nut (6.2) is connected and arranged between the universal coupling (4.1) and the connecting hole (6.1).

5. The steel pipe column mortise and tenon joint according to claim 1, characterized in that: The first docking hole (1.1.2) and the second docking hole (1.2.1) are provided with a limit guide groove; and further comprising a high-strength shear-resistant member (1.3), the high-strength shear-resistant member (1.3) being used to connect the first docking hole (1.1.2) and the second docking hole (1.2.1), a limit block (1.3.1) being protruding from a side end of the high-strength shear-resistant member (1.3), the limit block being adapted to the limit guide groove.

6. The steel pipe column mortise and tenon joint according to claim 1, characterized in that: The built-in spring (5) is an M-shaped spring, and connecting portions capable of being matched and connected to the connecting slot (3.1) are provided at both ends of the upper part and the middle position of the lower part of the built-in spring (5).

7. A steel pipe column mortise and tenon joint according to claim 1, characterized in that The steel mortise and tenon connector (4) is provided with two universal coupling members (4.1), which are respectively connected to the connection holes (6.1) on the upper and lower outer steel pipe columns (6).

8. The steel pipe column mortise and tenon joint according to claim 1 is characterized in that , the steel mortise and tenon connection piece (4) is made of shape memory alloy.

9. A construction method for a steel pipe column mortise and tenon joint according to any one of claims 1 to 8, characterized in that , including the following steps: Step 1: Prefabricate each component in the factory; Step 2: docking the outer steel pipe column (6), connecting the steel mortise and tenon joint (4) to the corresponding connection hole (6.1) through the universal joint (4.1), connecting to the docking area, fitting the half opening (2.1) of the inner docking steel pipe (2) to the steel mortise and tenon joint (4), and then welding it to the inner side of the outer steel pipe column (6); Step 3: After assembling the built-in spring (5) between the two reinforcing steel rings (3), weld it to the inner side of the internal butt steel pipe (2), wherein the reinforcing steel ring (3) is specifically welded in the middle position of the half opening (2.1); Step 4: Insert the upper steel section (1.1) and the lower steel section (1.2) from both sides of the outer steel pipe column (6) to form the inner steel section (1) after connecting the butt section (1.1.1) and the butt joint, and then weld and fix it to the outer steel pipe column (6); Step 5: After hoisting and fixing the connected steel pipe column vertically to the foundation, make adjustments and acceptance.

Images