Modular steel structure self-resetting pull rod-bolt connection joint and construction method

Abstract

The invention discloses a construction method of a modular steel structure self-resetting pull rod-bolt connection node, which comprises a lower corner box and an upper corner box, the lower corner box is connected between a module column and a module beam of an upper layer module, and the upper corner box is connected between a module column and a module beam of a lower layer module; the self-resetting assemblies are installed between the module columns and the module beams and arranged in an inclined mode, and the joints of the self-resetting assemblies and the module columns and the joints of the self-resetting assemblies and the module beams are connected through column SMA bolts and beam SMA bolts respectively; the upper-layer module and the lower-layer module are connected into a whole through a pull rod and a connecting sleeve. According to the connecting joint, the whole building is vertically connected into a whole through the pull rods and the connecting sleeves, vertical force transmission is continuous, holes do not need to be formed in the module columns and the module beams during construction, and section weakening is avoided; the upper corner box and the lower corner box are made of high-strength steel materials, and can be suitable for high-rise modular buildings.

Description

Technical Field

[0001] The invention relates to the technical field of building engineering, and in particular to a modular steel structure self-resetting tie rod-bolt connection node and a construction method. Background Art

[0002] With the development of building industrialization, steel structure modular buildings are widely used due to their advantages of fast construction speed and high structural stability. In steel structure modular buildings, the connection quality between modules directly affects the overall performance and safety of the building.

[0003] The existing connection methods of steel structure module buildings mainly include welding connection, bolt connection and welding and bolt combination connection, etc. These connection methods have obvious deficiencies in vertical force transmission continuity, detachability and seismic performance.

[0004] Although welding connections can provide higher connection strength and force transmission performance, they have high requirements on welding technology and quality during on-site construction. The construction is difficult and difficult to control, especially when maintenance or replacement of parts is required, disassembly is extremely inconvenient.

[0005] The bolt connection method is relatively simple to construct and easy to disassemble and maintain, but its vertical force transmission continuity is often not as good as that of the welding connection, which affects the stability and safety of the overall structure.

[0006] Although the welding and bolt connection method combines the advantages of both, its construction process is complicated, on-site operation is inconvenient, and there is also the problem of difficulty in disassembly.

[0007] The existing node connection method has a complex structure, numerous components, and high installation precision requirements. When encountering an earthquake, the frame deforms severely, which increases the construction difficulty and cycle, increases the construction cost, and is not conducive to the promotion and application of steel structure modular buildings.

[0008] Therefore, based on the above technical problems, technicians in this field urgently need to develop a modular steel structure self-resetting tie rod-bolt connection node and construction method. Summary of the invention

[0009] The purpose of the present invention is to provide a modular steel structure self-resetting tie rod-bolt connection node and a construction method, which aims to overcome the shortcomings of existing connection nodes and propose a new connection node that makes the vertical force transmission of the entire building continuous, is suitable for corner columns, side columns and middle columns, has good self-resetting ability after an earthquake, can be disassembled and reinstalled after the building is used, and adapts to the current development concept of green buildings.

[0010] In order to achieve the above object, the present invention provides the following technical solutions:

[0011] A modular steel structure self-resetting tie rod-bolt connection node of the present invention comprises:

[0012] A lower corner box and an upper corner box, wherein the lower corner box is connected between the module column and the module beam of the upper module, and the upper corner box is connected between the module column and the module beam of the lower module;

[0013] A self-resetting component installed between the module column and the module beam and arranged obliquely, wherein the connection between the self-resetting component and the module column and the module beam is respectively connected by a column SMA bolt and a beam SMA bolt;

[0014] The upper and lower modules are connected as a whole through a pull rod and a connecting sleeve.

[0015] Furthermore, the top surface of the lower corner box is welded and fixed to the module column of the upper module, and the lower corner box is provided with a reserved corner box tie rod hole, and the side surface of the lower corner box is welded and fixed to the module beam of the upper module;

[0016] The lower corner box has a lower corner box extension portion protruding to one side, and the lower corner box extension portion is provided with a lower corner box long bolt hole;

[0017] A lower corner box inner partition is provided inside the connection position between the lower corner box and the module column, and between the long bolt holes of the lower corner box.

[0018] Furthermore, the upper corner box and the lower corner box have the same structure, but are installed in different positions;

[0019] An upper corner box flat head bolt hole is opened on the top surface of the upper corner box, and a nut box is welded on one side of the inner side of the upper corner box flat head bolt hole, and a nut is arranged in the nut box;

[0020] An upper corner box long bolt hole is provided at a position where the upper corner box matches the lower corner box long bolt hole, and a nut box is welded to the upper corner box long bolt hole located on the bottom surface of the upper corner box, and a nut is provided in the nut box.

[0021] Furthermore, the tie rod is placed inside the module column, and both upper and lower ends of the tie rod have tie rod threads, and the upper end of the tie rod has a hexagonal tie rod rotating head;

[0022] A T-shaped wrench is provided in cooperation with the pull rod, and the T-shaped wrench cooperates with the pull rod rotating head of the pull rod to screw the pull rod;

[0023] The connecting sleeve comprises:

[0024] A connecting tube connected to the tie rods of the upper and lower modules respectively, wherein the connecting tube has an internal thread to achieve a threaded connection with the tie rod thread; and

[0025] A connecting sleeve fixing plate is formed between the two connecting sleeves, and the connecting sleeve fixing plate is a square plate, and connecting sleeve flat head bolt holes are provided at the four corners of the connecting sleeve fixing plate.

[0026] Furthermore, a connecting plate is provided between the upper and lower modules, and the connecting plate is provided with a square hole that cooperates with the connecting sleeve fixing plate, and long bolt holes for the connecting plate are reserved at both ends of the connecting plate;

[0027] The thickness of the connecting sleeve fixing plate is smaller than the thickness of the connecting plate;

[0028] A corrugated gasket is provided on the contact surface between the connecting sleeve fixing plate and the upper corner box.

[0029] Furthermore, the lower corner box, the connecting plate and the upper corner box are connected by long bolts, and the length of the long bolts is greater than the sum of the height of the lower corner box, the thickness of the connecting plate and the height of the upper corner box;

[0030] The long bolt passes through the lower corner box, the connecting plate and the upper corner box in sequence from top to bottom and is connected with the nut inside the nut box welded to the upper corner box.

[0031] Furthermore, a stiffening rib is welded and fixed between the module column and the corner box surface, and the self-resetting component includes:

[0032] Self-resetting component fixing plate;

[0033] A self-resetting component intermediate plate connected between the two self-resetting component fixing plates; and

[0034] Self-resetting component end plates installed on both sides of the self-resetting component middle plate;

[0035] The self-resetting component middle plate and the self-resetting component end plate are assembled through a deformation structure.

[0036] Furthermore, the deformation structure includes a deformation bolt, and the deformation bolt has a spring and a gasket near its end;

[0037] An SMA wire is connected between the ends of the two deformable bolts.

[0038] Further, a middle plate concave-convex groove is formed on the surface of the matching position between the middle plate of the self-resetting component and the end plate of the self-resetting component, and a side where the end plate of the self-resetting component matches the middle plate of the self-resetting component forms an end plate concave-convex groove;

[0039] The middle plate of the self-resetting component and the end plate of the self-resetting component are respectively provided with middle plate slots and end plate slots;

[0040] The deformed bolt passes through the middle plate slot hole and the end plate slot hole.

[0041] The present invention discloses a construction method of a modular steel structure self-resetting tie rod-bolt connection node. The construction method of the modular steel structure self-resetting tie rod-bolt connection node as described above mainly comprises the following steps:

[0042] S1. Make modular columns, modular beams, self-resetting components, upper corner boxes, lower corner boxes, tie rods, connecting sleeves, connecting plates, long bolts, nuts and stiffening ribs respectively;

[0043] S2. In the factory, the module beam is welded to both ends of the lower corner box and the upper corner box, the module column is welded to the top and bottom surfaces of the lower corner box and the upper corner box, and the two right-angle sides of the stiffening rib are respectively welded to the positions where the module column and the lower corner box and the upper corner box are connected;

[0044] S3, transport the modules and components to the construction site, screw the pull rod into the foundation sleeve or the connecting sleeve of the lower module, place the connecting plate between adjacent modules, and hoist them into the upper module;

[0045] S4. Place the corrugated gasket outside the hole of the connecting sleeve of the upper corner box, rotate the connecting sleeve to connect with the other end of the tie rod, and when the flat head bolt hole of the connecting sleeve is aligned with the flat head bolt hole of the upper corner box, screw in the flat head bolt to fix the connecting sleeve;

[0046] S5. Pass the long bolts through the lower corner box, the connecting plate and the upper corner box in sequence, and tighten them with the welding nuts at the lower part of the upper corner box. Place the self-resetting assembly at the designated position, connect the adjacent modules through the column SMA bolts and the beam SMA bolts, and complete the connection between the modules.

[0047] S6. After the building is put into use, remove the long bolts, flat head bolts, connecting sleeves, column SMA bolts, and beam SMA bolts to complete the dismantling of the upper module.

[0048] In the above technical solution, the present invention provides a modular steel structure self-resetting tie rod-bolt connection node and construction method, which has the following beneficial effects:

[0049] The connection nodes of the present invention use tie rods and connecting sleeves to connect the entire building vertically into a whole, with continuous vertical force transmission. During construction, there is no need to open holes inside the module columns and module beams to avoid weakening of the cross section. The upper corner box and the lower corner box are made of high-strength steel and can be suitable for high-rise modular buildings.

[0050] The connection node of the present invention can select different connection plates according to different module positions and is suitable for connecting different corner columns, side columns and center columns.

[0051] The node corner position of the present invention is equipped with a self-resetting component, which applies a certain pre-tightening force to the deformed bolt of the self-resetting component. At this time, the spring has a certain deformation space, and the middle plate and the end plate of the self-resetting component are tightly fitted. When the structure is deformed, the concave and convex grooves of the middle plate and the end plate that fit each other are displaced, and friction is generated on the contact surface, which plays an energy dissipation role. When the middle plate and the end plate are displaced, the spring is further compressed when the end plate expands outward, and the pre-tightening force of the deformed bolt increases accordingly. The spring generates elastic force to restore the original state, which leads to an increase in the friction between the middle plate and the end plate. When the SMA wire is in a tensile state, restoring the original length will provide a restoring force for the self-resetting component, which has a certain energy dissipation capacity and will increase the friction between the middle plate and the end plate. When the structure is deformed, the beam SMA bolts and the column SMA bolts will be elongated, generating a higher restoring force, forming a force couple to bear most of the bending moments at the ends of the beams and columns, thereby improving the energy dissipation capacity of the self-resetting component.

[0052] After the building is completed, the connection node of the present invention can be removed by removing the long bolts, flat head bolts, connecting sleeves and tie rods to enable the upper module to be removed, thereby realizing the architectural concept of green building. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0054] Figure 1 It is a schematic diagram of the exploded structure of the modular steel structure self-resetting tie rod-bolt connection node disclosed in the embodiment of the present application;

[0055] Figure 2 This is a schematic diagram of the overall structure of a modular steel structure self-resetting tie rod-bolt connection node disclosed in an embodiment of the present application;

[0056] Figure 3 It is a front view of a modular steel structure self-resetting tie rod-bolt connection node used for a corner column disclosed in an embodiment of the present application;

[0057] Figure 4 A top view of a modular steel structure self-resetting tie rod-bolt connection node disclosed in an embodiment of the present application;

[0058] Figure 5 It is a structural schematic diagram of a self-resetting assembly of a modular steel structure self-resetting tie rod-bolt connection node disclosed in an embodiment of the present application;

[0059] Figure 6 It is a structural exploded diagram of a self-resetting assembly of a modular steel structure self-resetting tie rod-bolt connection node disclosed in an embodiment of the present application;

[0060] Figure 7 It is a structural explosion diagram of the deformation structure of the modular steel structure self-resetting tie rod-bolt connection node disclosed in the embodiment of the present application;

[0061] Figure 8 It is a structural schematic diagram of the lower corner box of the modular steel structure self-resetting tie rod-bolt connection node disclosed in the embodiment of the present application;

[0062] Fig. 9 It is a structural schematic diagram of the upper corner box of the self-resetting tie rod-bolt connection node of the modular steel structure disclosed in the embodiment of the present application;

[0063] Fig.10 It is a schematic structural diagram of a tie rod of a self-resetting tie rod-bolt connection node of a modular steel structure disclosed in an embodiment of the present application;

[0064] Fig.11 It is a structural schematic diagram of a connecting sleeve of a modular steel structure self-resetting tie rod-bolt connecting node disclosed in an embodiment of the present application;

[0065] Fig.12 A schematic structural diagram of a connection plate of a modular steel structure self-resetting tie rod-bolt connection node disclosed in an embodiment of the present application;

[0066] Fig.13 A schematic diagram of the structure of a T-type wrench for a modular steel structure self-resetting tie rod-bolt connection node disclosed in an embodiment of the present application;

[0067] Fig.14 This is an installation diagram of the tie rod of the modular steel structure self-resetting tie rod-bolt connection node disclosed in an embodiment of the present application.

[0068] Description of reference numerals:

[0069] 1. Module column; 2. Module beam; 3. Self-reset assembly; 4. Lower corner box; 5. Upper corner box; 6. Pull rod; 7. Connecting sleeve; 8. Connecting plate; 9. Long bolt; 10. Nut; 11. Stiffening rib; 12. Flat head bolt; 13. Corrugated gasket; 14. Column SMA bolt; 15. Beam SMA bolt; 16. T-type wrench;

[0070] 31. Self-resetting assembly fixing plate; 32. Self-resetting assembly middle plate; 33. Self-resetting assembly end plate; 34. Fixing bolts; 35. Deformation bolts; 36. SMA wire; 37. Spring; 38. Gasket;

[0071] 311, beam SMA bolt hole; 312, fixing plate fixing bolt hole;

[0072] 321, concave-convex groove of the middle plate; 322, slot hole of the middle plate;

[0073] 331, end plate concave-convex groove; 332, end plate slot hole;

[0074] 41. Lower corner box tie rod hole; 42. Lower corner box connecting sleeve hole; 43. Lower corner box long bolt hole; 44. Lower corner box inner partition;

[0075] 51. Upper corner box tie rod hole; 52. Upper corner box connecting sleeve hole; 53. Long bolt hole on the bottom of the upper corner box; 54. Flat head bolt hole on the upper corner box; 55. Inner partition of the upper corner box;

[0076] 61. Tie rod thread; 62. Tie rod rotating head;

[0077] 71. Connecting sleeve; 72. Connecting sleeve fixing plate; 73. Connecting sleeve flat head bolt hole;

[0078] 81. Square hole; 82. Long bolt hole in connecting plate. DETAILED DESCRIPTION

[0079] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0080] See also Figures 1 to 14 As shown;

[0081] This embodiment discloses a modular steel structure self-resetting tie rod-bolt connection node, and the connection node of this embodiment includes:

[0082] A lower corner box 4 and an upper corner box 5, wherein the lower corner box 4 is connected between the module column 1 and the module beam 2 of the upper module, and the upper corner box 5 is connected between the module column 1 and the module beam 2 of the lower module;

[0083] The self-resetting component 3 is installed between the module column 1 and the module beam 2 and arranged obliquely. The connection between the self-resetting component 3 and the module column 1 and the module beam 2 is connected by the column SMA bolt 14 and the beam SMA bolt 15 respectively. In this embodiment, the self-resetting component 3 is installed between the module column 1 and the module beam 2. When the structure is subjected to earthquake or force, the module beam 2 and the module column 1 are relatively deformed. The self-resetting component 3 can play an energy dissipation role through the friction of the contact surface, and use its integrated spring 37 to restore the shape to squeeze the gasket 38 and the end plate 33 back to the original position. The self-resetting component 3 has an SMA wire 36 that provides a restoring force and has a certain energy dissipation capacity. The self-resetting component 3 is connected to the module column 1 and the module beam 2 respectively by the column SMA bolt 14 and the beam SMA bolt 15, both of which are made of shape memory alloy. Its superelastic effect provides the energy dissipation capacity and self-resetting capacity of the node.

[0084] The upper and lower modules are connected as a whole via a pull rod 6 and a connecting sleeve 7 .

[0085] Preferably, the top surface of the lower corner box 4 of this embodiment is welded and fixed to the module column 1 of the upper module, and the lower corner box 4 has a reserved corner box tie rod hole 41, and the side surface of the lower corner box 4 is welded and fixed to the module beam 2 of the upper module;

[0086] The lower corner box 4 has a lower corner box extension portion protruding to one side, and the lower corner box extension portion is provided with a lower corner box long bolt hole 42;

[0087] A lower corner box inner partition plate 43 is provided inside the connection position between the lower corner box 4 and the module column 1 and between the long bolt holes 42 of the lower corner box.

[0088] Based on the structure of the lower corner box 4, this embodiment further defines the structure of the upper corner box 5, wherein the upper corner box 5 of this embodiment has the same structure as the lower corner box 4, but has different installation positions;

[0089] As a difference from the lower corner box 4, the top surface of the upper corner box 5 of this embodiment is provided with an upper corner box flat head bolt hole 54, and a nut box is welded to one side of the inner side of the upper corner box flat head bolt hole 54, and the nut box has a nut 10 inside; the upper corner box 5 has a long bolt hole 53 starting from the position where the upper corner box 5 matches the long bolt hole 43 of the lower corner box, and the long bolt hole 53 on the bottom surface of the upper corner box 5 is welded with a nut box, and the nut box has a nut 10 inside.

[0090] Preferably, the tie rod 6 of this embodiment is placed inside the module column 1, and both the upper and lower ends of the tie rod 6 have tie rod threads 61, and the upper end of the tie rod 6 has a hexagonal tie rod rotating head 62;

[0091] A T-shaped wrench 16 is provided in cooperation with the pull rod 6, and the T-shaped wrench 16 cooperates with the pull rod rotating head 62 of the pull rod 6 to screw the pull rod 6;

[0092] The connecting sleeve 7 comprises:

[0093] A connecting tube 71 connected to the tie rods 6 of the upper and lower modules respectively, wherein the connecting tube 71 has an internal thread to achieve a threaded connection with the tie rod thread 61; and

[0094] A connecting sleeve fixing plate 72 is formed between the two connecting tubes 71 , and the connecting sleeve fixing plate 72 is a square plate. Connecting sleeve flat head bolt holes 73 are formed at four corners of the connecting sleeve fixing plate 72 .

[0095] As the connection structure of the upper and lower modules and in conjunction with the above-mentioned connecting sleeve 7, a connecting plate 8 is provided between the upper and lower modules of this embodiment, and the connecting plate 8 is provided with a square hole that cooperates with the connecting sleeve fixing plate 72, and long connecting plate bolt holes 73 are reserved at both ends of the connecting plate 8;

[0096] The thickness of the connecting sleeve fixing plate 72 is smaller than the thickness of the connecting plate 8;

[0097] A corrugated gasket 13 is provided on the contact surface between the connecting sleeve fixing plate 72 and the upper corner box 5 .

[0098] Based on the design of the above-mentioned connecting plate 8, the upper corner box 5 and the lower corner box 4, the lower corner box 4, the connecting plate 8 and the upper corner box 5 of this embodiment are connected by long bolts 9, wherein the length of the long bolts 9 is greater than the sum of the height of the lower corner box 4, the thickness of the connecting plate 8 and the height of the upper corner box 5;

[0099] The long bolt 9 passes through the lower corner box 4 , the connecting plate 8 and the upper corner box 5 in sequence from top to bottom and is connected with the nut 10 inside the nut box welded to the upper corner box 5 .

[0100] As an extended implementation method, when used for side column or middle column connection, a side column connection plate or a middle column connection plate is placed between two adjacent modules to connect the modules into a whole in the horizontal direction.

[0101] Preferably, a stiffening rib 11 is welded and fixed between the module column 1 and the corner box surface in this embodiment;

[0102] The self-resetting component 3 includes a self-resetting component fixing plate 31, a self-resetting component middle plate 32 connected between the two self-resetting component fixing plates 31, and a self-resetting component end plate 33 installed on both sides of the self-resetting component middle plate 32;

[0103] The self-resetting assembly middle plate 32 and the self-resetting assembly end plate 33 are assembled through a deformation structure.

[0104] Secondly, the deformation structure of this embodiment includes a deformation bolt 35, and the deformation bolt 35 has a spring 37 and a gasket 38 near its end;

[0105] An SMA wire 36 is connected between the ends of the two deformable bolts 35 .

[0106] In order to realize the energy dissipation capacity of the self-resetting component 3, the surface of the self-resetting component middle plate 32 and the self-resetting component end plate 33 in this embodiment is formed with a middle plate concave-convex groove 321, and the self-resetting component end plate 33 and the self-resetting component middle plate 32 are formed with an end plate concave-convex groove 331 on the side where the self-resetting component end plate 33 and the self-resetting component middle plate 32 are matched;

[0107] The middle plate 32 of the self-resetting assembly and the end plate 33 of the self-resetting assembly are respectively provided with a middle plate slot 322 and an end plate slot 332;

[0108] The deformed bolts 35 pass through the middle plate slots 322 and the end plate slots 332 .

[0109] Based on the structure of the above-mentioned self-resetting component 3, when the structure is subjected to earthquake or force, the module beam 2 and the module column 1 are relatively deformed, and the middle plate concave-convex groove 321 of the middle plate 32 of the self-resetting component and the end plate concave-convex groove 331 of the end plate 33 of the self-resetting component are relatively displaced, and the friction force on the contact surface is used to dissipate energy. When the middle plate 32 of the self-resetting component and the end plate 33 of the self-resetting component are displaced, the spring 37 is compressed, and the spring 37 compresses the gasket 38 and the end plate 33 of the self-resetting component to restore the shape and return to the original position. The SMA wire 36 provides a restoring force after deformation, and has a certain energy dissipation capacity.

[0110] The present invention discloses a construction method of a modular steel structure self-resetting tie rod-bolt connection node. The construction method of the modular steel structure self-resetting tie rod-bolt connection node as described above mainly comprises the following steps:

[0111] S1, respectively manufacture the module column 1, the module beam 2, the self-resetting assembly 3, the upper corner box 5, the lower corner box 4, the tie rod 6, the connecting sleeve 7, the connecting plate 8, the long bolt 9, the nut 10 and the stiffening rib 11;

[0112] S2. In the factory, the module beam is welded to the two ends of the lower corner box 4 and the upper corner box 5, the module column 1 is welded to the top and bottom surfaces of the lower corner box 4 and the upper corner box 5, and the two right-angle sides of the stiffening rib 11 are respectively welded to the positions where the module column 1 and the lower corner box 4 and the upper corner box 5 are connected;

[0113] S3, transport the modules and components to the construction site, screw the pull rod 6 into the base sleeve or the connecting sleeve 7 of the lower module, place the connecting plate 8 between adjacent modules, and hoist them into the upper module;

[0114] S4, place the corrugated gasket 13 outside the hole of the connecting sleeve 7 of the upper corner box 5, rotate the connecting sleeve 7 to connect with the other end of the tie rod 6, and when the connecting sleeve flat head bolt hole 73 is aligned with the upper corner box flat head bolt hole 54, screw in the flat head bolt 12 to fix the connecting sleeve 7;

[0115] S5. Pass the long bolts 9 through the lower corner box 4, the connecting plate 8 and the upper corner box 5 in sequence, and tighten the welding nuts on the lower part of the upper corner box 5. Place the self-resetting assembly 3 at the designated position, connect the adjacent modules through the column SMA bolts 14 and the beam SMA bolts 15, and complete the connection between the modules.

[0116] S6. After the building is used, the long bolts 9, flat head bolts 12, connecting sleeves 7, column SMA bolts 14, and beam SMA bolts 15 are dismantled to complete the dismantling of the upper module.

[0117] In the above technical solution, the present invention provides a modular steel structure self-resetting tie rod-bolt connection node and construction method, which has the following beneficial effects:

[0118] The connection nodes of the present invention use tie rods 6 and connecting sleeves 7 to connect the entire building vertically into a whole, with continuous vertical force transmission. During construction, there is no need to open holes inside the module columns 1 and module beams 2 to avoid weakening of the cross section. The upper corner box 5 and the lower corner box 4 are made of high-strength steel and can be suitable for high-rise modular buildings.

[0119] The connection node of the present invention can select different connection plates according to different module positions and is suitable for connecting different corner columns, side columns and center columns.

[0120] The node corner of the present invention is equipped with a self-resetting component 3, and a certain pre-tightening force is applied to the deformed bolt 35 of the self-resetting component 3. At this time, the spring 37 has a certain deformation space, and the middle plate and the end plate of the self-resetting component 3 are tightly fitted. When the structure is deformed, the concave and convex grooves of the middle plate and the end plate that fit each other are displaced, and friction is generated on the contact surface, which plays an energy dissipation role. When the middle plate and the end plate are displaced, the spring 37 is further compressed when the end plate expands outward, and the pre-tightening force of the deformed bolt 35 increases accordingly. The spring 37 generates elastic force to restore the original state, which leads to an increase in the friction between the middle plate and the end plate. When the SMA wire 36 is in a tensile state, restoring the original length will provide a restoring force for the self-resetting component 3, which has a certain energy dissipation capacity and increases the friction between the middle plate and the end plate. When the structure is deformed, the beam SMA bolt 15 and the column SMA bolt 14 will be elongated, generating a higher restoring force, forming a force couple to bear most of the bending moment at the ends of the beam and column, thereby improving the energy dissipation capacity of the self-resetting component 3.

[0121] After the building is completed, the connection node of the present invention can be dismantled by removing the long bolts 9, the flat head bolts 12, the connection sleeves 7 and the pull rods 6 to dismantle the upper modules, thus realizing the architectural concept of green building.

[0122] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. Modular steel structure self-resetting tie rod-bolt connection node, characterized in that: The connection node includes: A lower corner box (4) and an upper corner box (5), wherein the lower corner box (4) is connected between the module column (1) and the module beam (2) of the upper module, and the upper corner box (5) is connected between the module column (1) and the module beam (2) of the lower module; A self-resetting component (3) is installed between the module column (1) and the module beam (2) and is arranged obliquely, wherein the connection between the self-resetting component (3) and the module column (1) and the module beam (2) is respectively connected via a column SMA bolt (14) and a beam SMA bolt (15); The upper and lower modules are connected as a whole via a pull rod (6) and a connecting sleeve (7).

2. The modular steel structure self-resetting tie rod-bolt connection node according to claim 1, characterized in that: The top surface of the lower corner box (4) is welded and fixed to the module column (1) of the upper module, and the lower corner box (4) is provided with a reserved corner box tie rod hole (41), and the side surface of the lower corner box (4) is welded and fixed to the module beam (2) of the upper module; The lower corner box (4) has a lower corner box extension portion protruding toward one side, and the lower corner box extension portion is provided with a lower corner box long bolt hole (43); A lower corner box inner partition plate (44) is provided inside the connection position between the lower corner box (4) and the module column (1) and between the long bolt holes (43) of the lower corner box.

3. The modular steel structure self-resetting tie rod-bolt connection node according to claim 2, characterized in that: The upper corner box (5) and the lower corner box (4) have the same structure, but are installed in different positions; An upper corner box flat head bolt hole (54) is provided on the top surface of the upper corner box (5), and a nut box is welded to one side of the interior of the upper corner box flat head bolt hole (54), wherein a nut (10) is provided in the nut box; An upper corner box long bolt hole (53) is provided at a position where the upper corner box (5) matches the lower corner box long bolt hole (43), and a nut box is welded to the upper corner box long bolt hole (53) located on the bottom surface of the upper corner box (5), and a nut (10) is provided in the nut box.

4. The modular steel structure self-resetting tie rod-bolt connection node according to claim 3, characterized in that: The pull rod (6) is placed inside the module column (1), and both upper and lower ends of the pull rod (6) are provided with pull rod threads (61), and the upper end of the pull rod (6) is provided with a hexagonal pull rod rotating head (62); A T-shaped wrench (16) is provided in cooperation with the pull rod (6), and the T-shaped wrench (16) cooperates with a pull rod rotating head (62) of the pull rod (6) to screw the pull rod (6); The connecting sleeve (7) comprises: A connecting tube (71) connected to the pull rods (6) of the upper and lower modules respectively, wherein the connecting tube (71) has an internal thread to achieve threaded connection with the pull rod thread (61); and A connecting sleeve fixing plate (72) is formed between the two connecting sleeves (71), and the connecting sleeve fixing plate (72) is a square plate (81). Connecting sleeve flat head bolt holes (73) are provided at four corners of the connecting sleeve fixing plate (72).

5. The modular steel structure self-resetting tie rod-bolt connection node according to claim 4, characterized in that: A connecting plate (8) is provided between the upper and lower modules, and the connecting plate (8) is provided with a square hole (81) that matches the connecting sleeve fixing plate (72), and long connecting plate bolt holes (82) are reserved at both ends of the connecting plate (8); The thickness of the connecting sleeve fixing plate (72) is smaller than the thickness of the connecting plate (8); A corrugated gasket (13) is provided on the contact surface between the connecting sleeve fixing plate (72) and the upper corner box (5).

6. The modular steel structure self-resetting tie rod-bolt connection node according to claim 5, characterized in that: The lower corner box (4), the connecting plate (8) and the upper corner box (5) are connected by a long bolt (9), and the length of the long bolt (9) is greater than the sum of the height of the lower corner box (4), the thickness of the connecting plate (8) and the height of the upper corner box (5); The long bolt (9) passes through the lower corner box (4), the connecting plate (8) and the upper corner box (5) in sequence from top to bottom and is connected to the nut (10) inside the nut box welded to the upper corner box (5).

7. The modular steel structure self-resetting tie rod-bolt connection node according to claim 1, characterized in that: A stiffening rib (11) is welded and fixed between the module column (1) and the corner box surface, and the self-resetting component (3) comprises: Self-resetting component fixing plate (31); A self-resetting component intermediate plate (32) connected between the two self-resetting component fixing plates (31); and Self-resetting component end plates (33) installed on both sides of the self-resetting component middle plate (32); The self-resetting component middle plate (32) and the self-resetting component end plate (33) are assembled through a deformation structure.

8. The modular steel structure self-resetting tie rod-bolt connection node according to claim 7, characterized in that: The deformation structure comprises a deformation bolt (35), and the deformation bolt (35) has a spring (37) and a gasket (38) near its end; An SMA wire (36) is connected between the ends of the two deformable bolts (35).

9. The modular steel structure self-resetting tie rod-bolt connection node according to claim 8, characterized in that: The surface of the self-resetting component middle plate (32) at the matching position with the self-resetting component end plate (33) is formed with a middle plate concave-convex groove (321), and the self-resetting component end plate (33) is formed with an end plate concave-convex groove (331) on one side where the self-resetting component middle plate (32) matches the self-resetting component end plate (33); The self-resetting component middle plate (32) and the self-resetting component end plate (33) are respectively provided with a middle plate slot hole (322) and an end plate slot hole (332); The deformed bolt (35) passes through the middle plate slot hole (322) and the end plate slot hole (332).

10. A construction method for a modular steel structure self-resetting tie rod-bolt connection node, characterized in that: The construction method of the modular steel structure self-resetting tie rod-bolt connection node according to any one of claims 1 to 9 mainly comprises the following steps: S1. respectively manufacture a module column (1), a module beam (2), a self-resetting assembly (3), an upper corner box (5), a lower corner box (4), a tie rod (6), a connecting sleeve (7), a connecting plate (8), a long bolt (9), a nut (10) and a stiffening rib (11); S2. In the factory, the module beam (2) is welded to the two ends of the lower corner box (4) and the upper corner box (5), the module column (1) is welded to the top surface and the bottom surface of the lower corner box (4) and the upper corner box (5), and the two right-angle sides of the stiffening rib (11) are respectively welded to the positions where the module column (1) and the lower corner box (4) and the upper corner box (5) are connected; S3, transport the modules and components to the construction site, screw the pull rod into the base sleeve or the connecting sleeve (7) of the lower module, place the connecting plate (8) between adjacent modules, and hoist them into the upper module; S4, place the corrugated gasket (13) outside the hole of the connecting sleeve (7) of the upper corner box (5), rotate the connecting sleeve (7) to connect with the other end of the pull rod (6), and when the flat head bolt hole (73) of the connecting sleeve is aligned with the flat head bolt hole (54) of the upper corner box, screw in the flat head bolt (12) to fix the connecting sleeve (7); S5. Pass the long bolt (9) through the lower corner box (4), the connecting plate (8) and the upper corner box (5) in sequence, and tighten the long bolt (9) with the welding nut (10) at the lower part of the upper corner box (5). Place the self-resetting assembly (3) at the designated position, and connect the adjacent modules through the column SMA bolts (14) and the beam SMA bolts (15) to complete the connection between the modules. S6. After the building is used, the long bolts (9), flat head bolts (12), connecting sleeves (7), column SMA bolts (14), and beam SMA bolts (15) are dismantled to complete the dismantling of the upper module.

Images